JP2585426B2 - Multi-line communication control method and device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication method, particularly to a communication method and apparatus suitable for multi-line communication control.

[Conventional technology]

As communication speeds increase and communication data increases in capacity, communication control methods in information processing devices such as personal computers and workstations also perform all data transmission control and data processing while the system processor controls the line controller. The system has been changed from a system in which a communication adapter is provided, a processor dedicated to communication control processing, a memory, and the like are provided in the communication adapter in addition to a line controller, thereby reducing the load on the communication control processing of the system processor.
For example, Japanese Patent Application No. 63-181882 filed earlier by the applicant
In the "communication adapter control method and communication adapter", a memory shared with a processor dedicated to communication is provided in the communication adapter, and data transfer is performed via the shared memory. Also, a so-called gateway is realized in which two communication adapters are connected to a system processor to control two different lines and absorb a difference in protocol conversion and transmission speed between the two lines.

[Problems to be solved by the invention]

However, when controlling a plurality of lines by the above-described technology, a communication adapter is required for each line, which not only increases the scale, but also requires the system processor to control each of several distributed adapters. , Not easy to manage. Further, it is not easy to exchange information between communication processors in different communication adapters. In particular, when connecting to an ISDN (Integrated Services Digital Network), three channels, for example, 2B + D, are multiplexed on one line, and the D channel takes charge of call control of two B channels. Therefore, it is not easy to share each channel of 2B + D with three adapters.

An object of the present invention is to easily execute a multi-line such as ISDN,
It is another object of the present invention to provide a communication control method and device for controlling at high speed.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, there is provided a multi-line communication control method for performing communication control of a plurality of lines, and a communication control group including a plurality of communication control units corresponding to a plurality of communication paths. Are provided so that they can be controlled independently of each other. Also, one channel for connecting this communication control group and higher-level software that controls the communication control group is provided. Of 1
Specify one communication control unit. Further, a call control unit is provided in the communication control group, and multi-line communication control is performed while a call command is passed to a call control unit directly or indirectly through one of the communication control units through a channel. . Also, the call control unit is directly visible from the host software, and the communication control of the multi-line is performed by specifying one of the call control unit and the communication control unit by the identifier in the command. is there.

In addition, control can be performed by a different communication procedure for each communication channel as needed.

Further, a shared memory that can access a channel between the communication adapter and the host software from both sides is provided, and data is transferred via the shared memory.

[Action]

Since the upper software and the communication controller operate independently, high-speed communication control can be performed for each communication path, and the communication procedure can be easily changed for each communication path. In addition, since the host software and the plurality of communication control units are connected by one channel, the interface is simplified, so that not only control is simplified, but also errors in the operation procedure are reduced.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration example of a multi-line communication control system to which the present invention is applied. In FIG. 1, reference numeral 1 denotes a workstation main body, on which a communication adapter 3 as a communication control group is mounted, and a higher-level program 4 controls the communication adapter 3. The communication adapter 3 and the host program 4 are logically connected by one connection port 5, and data exchange is performed in a shared memory described in detail after being provided in the connection port 5. The communication adapter 3 is connected to an ISDN line 371 and a handset 365 for talking, for example, to connect to an ISDN providing a basic interface of 2B + D. The ISDN line 371 can simultaneously use, for example, two B channels and one D channel for voice and data communication. In the present embodiment, there are the following two types of modes using channels.

(A) Data communication (D channel) + data communication (B channel) + data communication (B channel) (b) Data communication (D channel) + data communication (B channel) + voice communication (B channel) In this case, the handset 365 is not always necessary.

As shown in FIG. 1, the communication adapter 3 includes an adapter processing unit a51, a data communication processing unit c52, a transmission control unit c53, a data communication processing unit d54, a transmission control unit d55, a call processing unit f56, and a data communication processing unit b57. , Voice processing unit e58, transmission control unit g59, line multiplexing unit
Consists of 60. Here, the data communication processing unit 52c and the transmission control unit c53 are one communication control unit, and the data communication processing unit 54d and the transmission control unit d55 are one communication control unit and the data communication processing unit b5.
8, Transmission control unit g59 is one communication control unit, adapter processing unit a
51 and the voice processing unit e58 are each one communication control unit. The call processing unit f56 and the transmission control unit g59 constitute a call control unit.

On the other hand, the host program 4 includes an adapter service unit a41,
It comprises a data communication service section c42, a data communication service section d43, a call service section f44, a data communication service section b45, and a telephone service section e46. The service units a to e except the call service unit f in the higher-level program 4 and the processing units a to e except the call processing unit f in the communication adapter 3 are connected to the identifiers a to Operation instructions and reports can be made only with the partner corresponding to e. The call service unit f44 of the higher-level program 4 is a part that provides a connection service for data or telephone communication, is connected to service units other than the data communication service unit b45, and issues a call setting instruction to the communication adapter 3 through the service units a to e. Is issued. The call service unit f44 and the data communication service unit b45 are not connected.
This is because the channel data communication is limited to the packet switching system and call control is not required.

The adapter processing unit a51 manages and manages the entire adapter such as initialization of the communication adapter 3 and self-diagnosis as described in detail later.
Perform control. After the power is turned on, the first operation is performed by the adapter processing unit a51.

The data communication processing unit c52 and the transmission control unit c53 perform data communication of the B1 channel. Data communication processing unit c52
Is responsible for the interface with the data communication service unit c42, and passes commands relating to calls to the call processing unit f56, and commands relating to other data communications to the transmission control unit c53. The transmission control unit c53 is an open system interconnection (O
It is in charge of controlling the data link layer of layer 2 in the seven-layer model of SI), and here, for example, HDLC-BA (High Level
Data Link Control Procedure (balanced asynchronous balanced mode class) packet switching method or HDLC-BA, HDLC
-Performs data communication control by circuit switching method of UN (High Level Data Link Control Procedure unbalanced normal response mode class).

The call processing unit F56 performs a call control for data communication and voice communication corresponding to the network layer portion of the OSI layer 3.
In response to a call setting request from the data communication processing unit c52, the data communication processing unit d54, and the voice processing unit e58, call control is performed in accordance with CCITT Recommendation I.451.

The data communication processing unit d54 and the transmission control unit d55 are units that perform data communication on the B2 channel. Data communication processing unit d54
Is responsible for interfacing with the data communication service unit d43, and passes commands relating to calls to the call processing unit f56 and commands relating to other data communications to the transmission control unit d55. Similarly to the transmission control unit c53, the transmission control unit d55 includes, for example, a packet switching method using HDLC-BA or an HDLC-BA, H
Data communication is controlled by the DLC-UN circuit switching system.

The data communication processing unit b57 is a part that performs D-channel data communication. It once receives a command from the data communication service unit b45 and passes it to the transmission control unit g59.

The voice processing unit e58 is a part that performs voice communication. An area for inputting and outputting audio is provided in the shared memory in the connection port 5. This is called an audio file. Voice communication is performed between the voice file and the handset 365 and either the B1 channel or the B2 channel. If you connect the handset 365 to the ISDN network, you can use normal telephone communication. If you connect the handset 365 to an audio file, you can record and play back messages locally. Also, if the audio file is connected to ISDN, the voice of the other party can be recorded, and the contents of the audio file can be reproduced and transmitted. When recording, use ADPCM (A
Audio is compressed from 64Kbps to 32Kbps or 24Kbps by daptive Differential Pulse Code Moduration (Daptive Differential Pulse Code Moduration) method to extend the recording time. At the time of playback, it is expanded to return to 64Kbps digital audio. Voice and data communication can be performed simultaneously if the channels are different.

The transmission control unit g59 controls transmission of the D channel corresponding to the data link layer portion of the OSI layer 2. Call processing unit f56
And data from the data communication processing unit b57 according to CCITT recommendation I.44
1 (LAPD: Link Access Procedure on the D-channel)
And flow to the D channel.

The line multiplexing unit 60 corresponds to the physical layer portion of the OSI layer 1 and multiplexes the D, B1, and B2 channels according to CCITT recommendation I.430.

In summary, the communication adapter 3 in this embodiment
Has three functions: data communication function, voice communication function, and call control function.
It can be seen that there are various types of functions.

Data communication uses all of the D channel, the B1 channel, and the B2 channel. In the D channel, data communication is performed by a packet switching method according to CCITT recommendation I.441 (LAPD). In the B1 and B2 channels, data communication is performed by a packet switching method using HDLC-BA or a circuit switching method using HDLC-BA and HDLC-UN. The transmission speed is 16 for the D channel.
The Kbps, B1, and B2 channels are 64 Kbps. The D channel, the B1 channel, and the B2 channel can, of course, independently perform data communication.

Voice communication is performed by selecting either the B1 channel or the B2 channel. In voice communication, recording / playback to a voice file is also possible.

Call control uses the D channel. Performs channel connection for data communication and voice communication. The control method follows the procedure of CCITT recommendation I.441 (LAPD) and I.451.

FIG. 2 shows an example of a network utilization form to which the present embodiment is applied. Workstation (WS)
1, 11, host computer 12, gateway (GW) 1
3, 14 are connected to the ISDN 15 with the communication adapter 3 shown in the embodiment of FIG. Among them, the host computer 12 and the GWs 13 and 14 do not have a handset. GW13,14
On the other hand, a local area network (LAN) is composed of WS16, 17, 18, and 19, and data is transferred from LAN to ISDN
15, It has the role of getting on the LAN from ISDN15. At this time, by storing the packetized data and transmitting it, for example, a difference in transmission speed between a 10 Mbps LAN and a 64 Kbps ISDN 15 is absorbed, and a difference in a communication procedure between the LAN and ISDN 15 is absorbed by protocol conversion.

Each device connected to the ISDN 15 has three channels B1, B2, and D, and can communicate with different parties in any combination. FIG. 2 shows the following three communication modes.

(A) Inter-WS communication (b) Cluster communication (c) Inter-LAN communication In the inter-WS communication of (a), data and voice are simultaneously communicated between WS1 and WS11 using the B1 and B2 channels. Voice is naturally real-time communication. The cluster communication (b) is a 1: n communication in which the host computer 12 communicates with a plurality of WSs via the GW 13. At this time, the GW 13 serves as a terminal control device and controls the WSs 16 and 17 operating as terminals.
In the LAN communication (c), the GW 13 and the GW 14 are connected to each other via the ISDN 15, so that the LAN of the GW 13 and the LAN of the GW 14 are logically connected to one another.
It is for showing to LAN. Thus, for example, W
S17 can communicate with WS19 as if it were on the same LAN.

In FIG. 2, the host computer 12 and the gateway (G
W) 13 and 14 do not have a handset, but it is possible to attach a handset. In the case where GW13 and GW14 are installed at remote values with respect to the host computer 12,
For example, it becomes difficult to add a WS connected to the LAN and perform a trial run, or to investigate the cause when a failure occurs. In such a case, if a handset is provided in the host computer 12 and the GWs 12 and 13, the maintenance personnel can easily perform a trial run and an investigation of the cause of the failure while talking with each other using the handset.

FIG. 3 is a diagram showing an example of a housing arrangement of WS1;
Here, the workstation 2050/32 made by Hitachi, Ltd. is taken as an example. The main unit 101 has option slots No. 1 to No. 7, and the communication adapter 3 in FIG.
It can be mounted anywhere in the empty slot 106 of o.5.
When installing, the dummy package 111 of the slot
And insert it. 1 is stored in an optional memory package mounted on the basic memory package 109 and the main memory slot 110, and
Executed in package 105.

Next, the interface between the host program 4 and the communication adapter 3 in FIG. 1 will be described. Top program 4
An operation instruction from the communication adapter 3 to the communication adapter 3 is called a start command, and a report from the communication adapter 3 to the host program 4 is called a report command. The start command and the report command are transferred via the connection port 5. The start command and the report command flow at the same time, but only one command each. In other words, although there are logically five channels in FIG. 1,
Physically, it is one channel.

FIG. 4 shows the format of the start command, and FIG. 5 shows the format of the report command. Each of the start command and the report command is composed of 8 words and 16 bits / word. The start command code and the report command code represent the type of command, and the parameters are command modification information. The order number is used in the order in which the commands are issued. For example, if the start command is issued, +1 is added. In the report command, the order number of the start command is copied and passed as it is. Can be determined by checking the report command code and the sequence number even if the response is to the issued start command. The identifier is obtained by coding the destination of the start command and the report command, and indicates the corresponding processing unit of the communication adapter 3 or the corresponding service unit of the higher-level program 4.

FIG. 6 shows service units and processing units corresponding to the identifiers. There are five types of identifiers, 00 to 04. A large amount of data attached to the start command and the report command, such as transmission / reception data, is transferred to a shared memory in the connection port 5. The start address of the data is indicated by a pointer in the start command and the report command, and the data length is the size of the data. The call identifier is for identifying a call that exists simultaneously between one service unit and a processing unit. For example, when an incoming call is received during a call, a higher-level program is notified using a call identifier different from that during the call, and a call waiting service or the like is realized. FIG. 7 shows a start command, a type and a code of a report command, a service unit and a processing unit which can use the command.

An example of using the start command and the report command will be described with reference to the sequence charts in FIG. 8 and subsequent figures. Start command,
The letters a to e in parentheses after the report command are abbreviations of identifiers.

FIG. 8 is a rise sequence diagram. When the power is supplied to the communication adapter 3, the adapter processing unit a5 shown in FIG.
1 operates, initializes the inside of the communication adapter 3, performs a self-diagnosis, and starts up the result.
(A) ”indicates the adapter service part a41 of the upper-level program 4
Report to The adapter service unit a41 stores the data communication processing units c52 and d54 of the communication adapter 3 in the shared memory in the connection port 5.
The program of b57, call processing unit f56, and voice processing unit e58 is set, and a program loading command “IPL (a)” is issued. When the adapter processing unit a51 receives the “IPL (a)” command, the corresponding program is loaded into the communication adapter 3, and after completion, the loading end command “IPL end”
(A) "is returned and the program jumps to the loaded program. The programs of the transmission control units c53 and d55 are loaded immediately before performing data communication. The transmission control unit g59 and the line multiplexing unit 60 can be realized by a program. Then dedicated
An LSI is used, and therefore no program loading is performed.

FIG. 9 is a diagram showing an example of a data communication sequence using the B1 channel. In the sequence between the communication adapter 3 and the ISDN 15, a bold line indicates that the D channel is used, and a thin line indicates that the B channel is used. First, when a call setting request is sent from the call service unit f44 to the data communication service unit c42, the data communication service unit c42 transmits the call setting request command “Ca11
(C) is issued. When the data communication processing unit c52 receives this and passes it to the call processing unit f56, the call processing unit f56 controls according to the procedure of I.451, and further, the transmission control unit g59 controls the LAPD data. Sends a call setup message (SET UP) to the D channel of ISDN15 while controlling the link and waits for a response message (CONN) Call setup acceptance message (CALL PROC)
Is a message notifying that ISDN 15 has received the call setup message (SET UP). When a response message (CONN) comes from ISDN 15, a response confirmation message (CONN ACK) is returned to ISDN 15 and the data communication service unit c42
To the call setting end command “Called (c)”.

When the data communication service unit c42 notifies the call service unit f44 that the call has been set, the B1 channel is connected to the other party, and thereafter, communication is performed on the B1 channel.
First, the data communication service unit c42 sets the program of the transmission control unit c53 in the shared memory in the connection port 5 and issues the program loading command “IPL (c)”. When the data communication processing unit c52 receives “IPL (c)”,
The corresponding program is loaded to the communication adapter 3 and a loading end command “IPL end (c)” is returned. ILP
Is completed, the data communication service unit c42 issues a link setting command “Connect (c)”, and upon receiving the command, the transmission control unit c53 uses the B1 channel and follows the HDLC-BA procedure in the asynchronous balanced mode. Outputs the set frame “SABM” and waits for the report frame “UA”. Report frame "UA"
Is returned, a link setting end command "Connected (c)" is returned to the data communication service unit c42, whereby the link of the B1 channel is established and information transfer becomes possible. In the data transmission procedure, first, the data communication service unit c42 sets the transmission data in the shared memory in the connection port 5, and issues a transmission command “SND (c)”. In the transmission control unit c53, HDLC-BA
This is transmitted to the B1 channel as an information transfer frame “I” according to the procedure of
Wait for. Upon receiving the “RR” frame, the transmission control unit c53
Then, the transmission end command “S
ND Buf Rel (c) "is returned to notify that transmission has been completed and the buffer containing the transmission data has been released.

When disconnecting the link of the B1 channel, the data communication service unit c42 sends a link disconnection command “Disconnect”.
(C) ", the transmission control unit c53 receiving the
Output the disconnection mode setting frame "DISC" to one channel and wait for the report frame "UA". When the report frame “UA” arrives, a disconnection end report command “Disconnected (c)” is returned to the data communication service unit c42, and this means that the information transfer link of the B1 channel has been disconnected. Disconnecting a call is the same procedure as setting up a call. When a call disconnection request is sent from the call service unit f44 to the data communication service unit c42, the data communication service unit c42 transmits a call disconnection request command “Ki11
(C) ". When the data communication processing unit c52 receives this and passes it to the call processing unit f56, the call processing unit f56 and the transmission control unit g5
Sends a disconnect message (DISC) to ISDN 15 while controlling in step 9, and waits for a release message (REL). When the release message (REL) arrives, a release completion message (REL C
OMP) and a disconnection end command “Killed (c)” to the data communication service unit c42. When the data communication service unit c42 notifies the call service unit f44 that the call has been disconnected, the B1 channel is completely released from the ISDN 15.

The procedure of incoming call and data communication is as shown in the right half of FIG. The start-up sequence is as shown in FIG. 8, and hereafter the start-up will be described. The transmission control unit g59 sends a call setup message (SET
UP), this is notified to the call processing unit f56, and the call processing unit f56 selects an empty channel from the B1 and B2 channels.
Now, assume that the B2 channel is empty. Call processing unit f56
Notifies the call service unit f44 through the data communication processing unit d54 and data communication service unit d43 of the B2 channel that the call has been received using the call report command "Call Req (d)", and issues an instruction from the call service unit f44. wait. At this time, a call setting acceptance message (CALL PROC) is returned to ISDN15. In the call service unit f44, when the call setup is ready, the call processing unit f43 is passed through the data communication service unit d43 and the data communication processing unit d54.
The call confirmation command “CALL Cnf (d)” is returned to 56. In response to this, the call processing unit f56 controls according to the procedure of I.451, and the transmission control unit g59 sends a response message (CON
N). The B2 channel is now connected to the other party. Response confirmation message from ISDN15 (CONN A
CK) is a message notifying that ISDN 15 has received the response message (CONN).

Next, the host program 4 loads the program of the transmission control unit d55 to the communication adapter 3 using the program loading command “IPL (d)”, but this procedure is as described above, and is omitted here. I do. When the transmission control unit d55 operates in accordance with the HDL-BA and receives the asynchronous balanced mode setting frame “SABM” from the B2 channel, the state transits to the link established state and returns the report frame “UA”. Processing unit d54
Through the link setting request command “Connect Req (d)” to the data communication service unit d43 to report that the link setting request has been established. This allows data transmission and reception on the B2 channel. When the transmission control unit d55 receives the information transfer frame “I” from the B2 channel, the notification frame “R”
R "to inform the other party that the information transfer frame" I "has been received, and to the data communication service unit d43 through the data communication processing unit d54, the reception report command" RCV ".
(D) "notifies that the data has been received. The data communication service unit d43 processes the received data, and then returns the reception buffer to the transmission control unit d55 with the reception confirmation command" RCV Buf Rel (d) ". When the control unit d55 receives the disconnection mode setting frame “DISC” from the B2 channel, the control unit d55 transits to the link disconnection state, returns a report frame “UA”, and sends the link disconnection report command “Disconnect” to the data communication service unit d43 through the data communication processing unit d54. Req (d) "reports that the link has been disconnected. When the transmission control unit g59 receives the disconnection message (DISC) from the D channel, it transmits this to the call processing unit f5.
6, the call processing unit f56 sends a call disconnection report command “Kill Re” to the call service unit f44 through the data communication service unit d43.
In step q (d) ", it notifies that there is a call disconnection request from ISDN 15 and waits for an instruction from call service unit f44. Call service unit f
At 44, when the call disconnection is ready, a call disconnection confirmation command “Kill Cnf (d)” is returned to the call processing unit f56 through the data communication service unit d43 and the data communication processing unit d54. Upon receiving this, the call processing unit f56 controls according to the procedure of I.451, and sends a release message (REL) from the transmission control unit g59 to the ISDN 15. The ISDN 15 notifies that the release message (REL) has been received by a release completion message (REL COMP). with this
The B2 channel is completely released from ISDN15.

FIG. 10 is a diagram showing an example of a voice communication sequence. The call setting and the incoming call processing are performed by the telephone service unit e4 in FIG.
6 and the voice processing unit e58. The processing procedure is the same as the case of the data communication in FIG. In the case of a call on the left side in FIG. 10, when the telephone service unit e46 receives the call setting end command “Called (e)” from the voice processing unit e58, in the case of a call on the right side in FIG. 10, the voice processing unit e58. Sends a response message (CONN) to ISDN 15 in response to the call confirmation command “Call Cnf (e)” from the telephone service unit e46, and when the handset 365 receives the response confirmation message (CONN ACK) from ISDN 15, Connected to one of the B2 channels to enable talking.
A message voice can be transmitted while talking on the telephone. When the telephone service unit e46 sets the message voice in the shared memory in the connection port 5 in FIG. 1 and issues a playback command "Play Back (e)" to the voice processing unit e58, the voice processing unit e58
Disconnects the channel from the handset 365 and sends a voice message in the shared memory to the channel. When all the message voices have been transmitted, the voice processing unit e58 is switched to the telephone service unit e46.
Returns the playback end command “Play Back end (e)” to
Reconnect handset 365 to the original channel. If you want to record the other party's voice during a call, do so as shown on the right side of FIG. The telephone service unit e46 issues a recording command “Record (e)” to the voice processing unit e58. The voice processing unit e58 also records the voice input to the handset 365 in the shared memory designated by the telephone service unit e46, and after a lapse of the designated time, sends a recording end command “Recorded” to the telephone service unit e46.
(E) "is returned. The voice being recorded can be heard by the handset 365 if necessary. The disconnection of the call is the same as that in the case of the data communication in FIG.

FIG. 11 is a block diagram showing an embodiment of another multi-line communication control system employing the present invention. In the figure, reference numeral 101 denotes a workstation main body,
As shown in the figure, a communication adapter 301 is mounted on the main body 101, and the upper program 4 controls the communication adapter 301.
01. The communication adapter 301 and the host program 401 that controls the communication adapter 301 are logically connected through a connection port 501. The configuration of the host program 401 is the same as the example in FIG.
It comprises an adapter service unit a411, a data communication service unit c421, a data communication service unit d431, a call service unit f441, a data communication service unit b451, and a telephone service unit e461. The configuration of the communication adapter 301 is the same as in the example of FIG. 1, and includes an adapter processing unit a511, a data communication processing unit c521, a transmission control unit c531, a data communication processing unit d541, a transmission control unit d551, a call processing unit f561, and a data communication process. It comprises a unit b571, an audio processing unit e581, a transmission control unit g591, and a line multiplexing unit 601. In this embodiment, the call service unit f441 and the call processing unit f561 are connected via the adapter service unit a441 with the identifier a and the adapter processing unit a551. Thereby, there is an advantage that the call control and the data communication or the voice communication are separated, and the command between the service unit in the host program 401 and the processing unit in the communication adapter 301 is simplified.

FIG. 12 shows the format of the start command, and FIG. 13 shows the format of the report command. 4 and 5 is that a request identifier and a response identifier are newly provided. The request identifier is the communication adapter used by the call service unit f441.
It is used to specify a data communication processing unit and a voice processing unit that are call setting targets when making a call setting request to 301. The response identifier is used to specify a data communication service unit and a voice service unit to be called when the call processing unit f561 receives a call and notifies the call service unit f441 of the call.

FIG. 13 shows examples of start commands, types and codes of report commands, and service units and processing units that can use the commands. What is different from FIG.
“Call”, “Called”, “Call Req”, “Call Cnf”, “Kill”,
"Killed", "Kill Req", "Kill Req", "Kill Cnf" are handled by the adapter service unit a411 and the adapter processing unit a511, and the rest is the same. Accordingly, the processing procedure is also the same as that of the commands “Call” and “Calle” in FIGS. 9 and 10.
d "," Call Req "," Call Cnf "," Kill "," Killed "," Kil
l Req "and" Kill Cnf "are all a
The procedure itself does not change.

FIG. 26 is a block diagram showing a configuration example of another multi-line communication control system employing the present invention. In the figure, reference numeral 102 denotes a workstation main body,
As shown in the figure, a communication adapter 302 is mounted on the main body 102, and the communication adapter 302 is controlled by a host program 4.
02. The communication adapter 302 and the host program 402 that controls the communication adapter 302 are logically connected through a connection port 502. The configuration of the host program 402 is the same as the example in FIG.
It comprises an adapter service unit a412, a data communication service unit c422, a data communication service unit d432, a call service unit f442, a data communication service unit b452, and a telephone service unit e462. The configuration of the communication adapter 302 is the same as that of the example of FIG. 1, and includes an adapter processing unit a512, a data communication processing unit c522, a transmission control unit c532, a data communication processing unit d542, a transmission control unit d552, a call processing unit f562, and a data communication process. It comprises a unit b572, an audio processing unit e582, a transmission control unit g59, and a line multiplexing unit 60. This embodiment is different from the embodiment shown in FIG. 1 in that the call service unit f442 and the call processing unit f562 are directly connected. As a result, the command related to the call and other commands are separated by the identifier, so that the command between the service unit in the host program 402 and the processing unit in the communication adapter 302 is simplified, and errors are less likely to occur. Also, for example, when a call is received from another party during a call using the handset 365, the call processing unit f and the call service unit f are directly connected unlike in FIG. it can. The format of the start command and the report command is the same as the example of FIG. 11, and is shown in FIGS. 12 and 13. The request identifier is the call service unit f4
When the communication adapter 302 makes a call setting request, the communication adapter 42 is used to specify a data communication processing unit and a voice processing unit that are call setting targets. The response identifier is used to designate a data communication service unit and a voice service unit to be called when the call processing unit f562 receives a call and notifies the call service unit f442 of the call.

FIG. 27 shows examples of start commands, types and codes of report commands, and service units and processing units that can use the commands. What is different from FIG.
“Call”, “Called”, “Call Req”, “Call Cnf”, “Kill”,
“Killed”, “Kill Req”, “Kill Cnf” are sent to the call service unit f44.
The point that it is handled by the call processing unit f562 with 2 does not change. Therefore, the processing procedure is also the same as that of the commands “Call”, “Called”, “Call Req”, “Call C” in FIGS.
Only the identifiers of “nf”, “Kill”, “Killed”, “Kill Req”, and “Kill Cnf” are all f, but the procedure itself does not change.

Next, a description will be given of an embodiment of the hardware of the communication adapter 3 for realizing FIGS. 1, 11 and 26. FIG. In the following, the method of realization will be described based on the embodiment of FIG. 1, but it goes without saying that the same configuration can be similarly applied to the embodiments of FIGS. 11 and 26.

FIG. 15 is a block diagram of the communication adapter 3. Regarding this configuration, for example, Japanese Patent Application No.
Please refer to No. 3 “Multi-line communication control method”. Now, one workstation main body is provided with a system processor section 23, and this main body 1 has a communication adapter 3
Is mounted. The communication adapter 3 is connected to an ISDN line 371 providing a basic interface of 2B + D and a handset 365 for communication. System processor unit 23
Is a CP that controls the entire main unit 1 and the communication adapter 3
It comprises a U2 and a main memory 21 in which programs and data of the CPU 2 are stored. The system processor unit 23 and the communication adapter 3 are connected by a system bus 22. Communication adapter 3
Are main processor units 32 and 33 that perform B-channel or B2 channel data communication, and perform B-channel voice communication, D-channel data communication, and D-channel call control.
4. LAPD processing unit 35 which performs data link layer level processing for data communication and call control of D channel, D channel,
Line driver 37, B1 for multiplexing and demultiplexing B1 and B2 channels
Channel and B2 channel are connected to the sub-processor units 32 and 33 and the handset, and the B-channel control unit 36 that performs audio compression / decompression processing, the system processor unit 23, the main processor unit 34, and the sub-processor units 32 and 33 share memory. The memory sharing unit 31 performs data exchange while sharing.

The upper program 4 in FIG. 1 is the main memory 21 in FIG.
And executed by CPU2. The line multiplexing unit 60 in FIG.
The transmission control unit g59 includes the line driver 37 and the LAPD processing unit 35 shown in FIG.
The transmission control unit c53 and the transmission control unit d55 in FIG. 1 are program-processed by the CPU and the RAM of the sub-processor units 32 and 33 in FIG. Other adapter processing unit a51, data communication processing unit c52, data communication processing unit d54, data communication processing unit b57,
The call processing unit f56 and the voice processing unit e58 are all programmed by the CPU 341 and the RAM 343 of the main processor unit 34 in FIG. However, part of the adapter processing unit a51 is stored in the ROMa342
Performed at 341. The connection port 5 in FIG. 1 corresponds to the memory sharing unit 31 in FIG. 15, and the shared memory inside the connection port 5 is realized by the RAMe 312 in the memory sharing unit 31.

The system processor unit 23 and the memory sharing unit 31 are connected by a system bus 22. The memory share unit 31, the main processor unit 34, and the sub-processor units 32 and 33 are connected to a local bus e313 to exchange data. The local bus a345 of the main processor 34 has a line driver 3
7. The LAPD processing unit 35 and the B channel control unit 36 are connected, and the main processor unit 34 controls them. 2B + of ISDN line 371
The D channels are demultiplexed and multiplexed by a line driver 37. Of the channels, the D channel is connected to an LAPD processing unit 35, and the B1 and B2 channels are connected to a B channel control unit 36. In the B channel control unit 36, the B1 and B2 channels are connected to the handset 365, the sub processor units 32 and 33, and the main processor unit 34 according to an instruction from the main processor unit 34.

The main processor unit 34, the sub processor units 32 and 33, the LAPD processing unit 35, and the system processor unit 22 each have a CPU (Central Processing Unit), a memory, and a bus, and can operate independently.

The main processor 34 comprises a ROM (read only memory) a342, a RAMa343, a CPUa341 that executes programs of the ROMa342 and the RAMa343, and a controller a344, which are connected to a local bus a345. ROMa342 is
This is a read-only memory for storing a program for self-diagnosis of the communication adapter 3 and for loading a program stored in the RAMa 343 from the RAMe 312, and has a capacity of 32 Kbytes. When the power of the communication adapter 3 is turned on, the CPUa341 executes the program from the beginning of the ROMa342. RAMa343
Is a readable / writable memory for storing programs for processing voice communication and call control procedures, and has a capacity of 128 kbytes. Controller a344 is a local bus e313
Bus control between CPU and local bus a345 and CPUa341 is ROMa342, R
Performs access control when accessing AMa343. RAMa
For example, the CPUa341 that executes the RAMa343 uses an HD64180S 8-bit microcomputer manufactured by Hitachi, which operates at 10 MHz.

The sub processor unit 32 is a subordinate processor that operates under the main processor unit. The sub processor unit 32 is a RAMb 32
2, CPUb321 for executing the program of RAMb322, controller b324 and line 32 connected to B1 or B2 channel
6 includes a serial controller b322 for transmitting and receiving data, and these are connected to a local bus b325.
RAMb322 is a H-channel data link control procedure.
It is a read / write memory that stores programs for processing DLC-BA and HDLC-UN, and has a capacity of 32 Kbytes. The controller b324 controls the path between the local bus e313 and the local bus b325, the access control when the CPUb321 accesses the RAMb322, the command handshake for the main processor unit 34 to instruct the subprocessor unit 32 to operate, and to receive a report. Perform control. CPUb321 that executes the program in RAMb322 and serial controller b323
For example, it is assumed that an HD64180S one-chip 8-bit microcomputer manufactured by Hitachi, which operates at 10 MHz is used. The sub-processor 32 has no ROM. Therefore, the main processor unit 34
Downloads the program to the RAMb322 via the controller b324, and then starts the CPUb321.

The sub processor unit 33 is a subordinate processor that operates under the main processor unit. The sub processor unit 33 is a RAMc 33
2, the CPU 33 that executes the program of the RAMc 332, the controller c334, and the line 33 connected to the B1 or B2 channel
6 includes a serial controller c332 for transmitting and receiving data, and these are connected to a local bus c335.
RAMc 332 is a H-channel data link control procedure.
It is a read / write memory that stores programs for processing DLC-BA and HDLC-UN, and has a capacity of 32 Kbytes. The controller c334 controls a path between the local bus e313 and the local bus c335, an access control when the CPU c331 accesses the RANc332, a command handshake for the main processor unit 34 to instruct the sub-processor unit 33 to operate or to receive a report. Perform control. CPU that executes RAMc332
The c331 and serial controller c333 are, for example, a one-chip 8-bit microcomputer manufactured by Hitachi, which operates at 10 MHz, an HD
64180S shall be used. The sub processor unit 33 has no ROM. Therefore, the main processor unit 34 sets the controller c3
The program is downloaded to the RAMc332 via 34, and then the CPUc331 is started.

The LAPD processing unit 35 operates under the main processor unit 34.
This is a PD dedicated processing unit. The LAPD processing unit 35 includes a CPU d351 that executes a program of the ROM d352, a serial controller d353 that transmits and receives data to and from the D channel line 372, and a controller d354, and these are connected to the local bus d355. The ROMd 352 is a read-only memory that stores a program for processing the LAPD, which is a data link control procedure for the D channel. The controller d354 controls a path between the local bus a345 and the local bus d345. LAPD
As the processing unit 35, for example, μPD72305 manufactured by NEC Corporation is used.

The B channel control unit 36 includes an ADPCM 361, a CODEC (coder / decoder) 363, a driver 364 for connecting to a handset 365, and a line switching circuit 362, and a local bus a3.
It is controlled by the main processor unit 34 through 45. ADPCM361
Is the B1, B2 channel of ISDN line 371 or handset 36
64Kbps PCM audio from 5 compressed to 32Kbps or 24Kbps
Record on RAMe312 or compress RAMe312 compressed audio to 64Kbps PC
This is a compression / decompression circuit for decompressing into M voice and transmitting it to the B1 and B2 channels or the handset 365. CIDEC363 is 64
This is a digital-to-analog conversion circuit that exchanges Kbps PCM voice and analog voice. The line switching circuit 362 connects the B1 channel 373 and the B2 channel 374 to the line 326, the line 336 or the AD.
Connect to PCM361 or CODEC363 or ADPCM361 and CODEC3
This is a line switching circuit for directly connecting 63. ADPCM361 is
For example, the μPD77C30 and CODEC363 manufactured by NEC use HD44278 manufactured by Hitachi, Ltd.

The line driver 37 is connected to the CPUa34 through the local bus a345.
The D channel 372, the B1 channel 373, and the B2 channel 374 are separated from the multiplexed ISDN line 371 controlled by 1, and, for example, μPD98201GF manufactured by NEC Corporation is used.

The memory sharing unit 31 includes a RAM e312 and a controller e311. RAMe312 is connected to system bus 22 and local bus e
It is a read / write shared memory that can be accessed from both the 313 and has a capacity of 512K bytes.
The controller e311 is connected to the system bus 22 and the local bus e3.
The memory contention arbitration at the time of simultaneously accessing the RAMe 312 from the memory 13, the bus contention arbitration for the use request of the local bus e 312 from the main processor unit 34, the sub processor unit 32, and the sub processor unit 33, and the system processor unit 23 It performs command handshake control for giving an operation instruction to the unit 34 and receiving a report.

FIG. 16 shows a memory storage state of the RAMe 312. Start up communication adapter 3 for CPUa341, CPUb
321, the transmission buffer and the reception buffer area of the CPU 331 are used. The system processor unit 23 puts the program of the CPUa341 into the transmission / reception buffer area of FIG. 16, and instructs the CPUa341 to load the program. Loading is ROMa
After the program 342 is executed and the corresponding program is loaded into the RAMa 343, the storage state shown in FIG. 16 is obtained. CPUa341
Areas used in (1) include an initial setting block, a transmission buffer and a reception buffer used for D-channel data communication, and a voice storage area used for voice communication. Areas used by the CPUb 321 include an initialization block, a transmission buffer used for B-channel data communication, and a reception buffer. Areas used by the CPU c331 include an initialization block, a transmission buffer used for B-channel data communication, and a reception buffer. The initial setting block is an area used to determine operating conditions between the system processor unit 23 and the communication adapter 3 at first. For example, the maximum transmission / reception data length and timeout value set by the system processor unit 23, the transmission allocated by the adapter, There are the position and size of the buffer and the receiving buffer. Communication control program A and communication control program B are programs executed by CPUb321 and CPUc331.
Leave it on Me312. The main processor unit 34 can freely exchange communication control programs by downloading to the sub-processor unit 32 or the sub-processor unit 33 as necessary. The failure logging area is where communication errors and hardware errors occurring in the communication adapter 3 are recorded, where the CPUa341, CPUb321, CP
Used in common with Uc331.

FIG. 17 shows a memory space of four local buses 325, 335, 313, and 345 in the communication adapter 3 of FIG. 15, which is a CP connected to each local bus.
It can also be said to represent the memory space position of the hardware resource as viewed from U. The bold line in the figure indicates the location of the actual local bus, and other local buses can see
The mapping position is as shown in the figure.

The local bus b325 has a memory space of 1 Mbyte,
The program is stored from the lowest part of the memory space 32
The Kbyte RAMb322 and the controller b324 are allocated, and the RAMe312 is allocated at the top of the memory space. Sub-processor 32
Is a subordinate processor that operates under the main processor unit 34, so that the sub processor unit 32
And the hardware resources of the main processor unit 34 are not visible.

The local bus c335 has a memory space of 1 MB,
The program is stored from the lowest part of the memory space 32
A K byte RAMc332 and a controller c334 are allocated, and a RAMe312 is allocated at the top of the memory space. Sub-processor 33
Is a subordinate processor that operates under the main processor unit 34, so that the sub processor unit 33
And the hardware resources of the main processor unit 34 are not visible.

The local bus e313 has a space of 1 Mbyte, and allocates the controller e311 to the lowest part of the memory space and the RAMe312 to the highest part of the memory space. Also, RAMc33 which is a hardware resource of the local bus b325 and the local bus c335
(2) In order to make the controller c334, the RAMb322, and the controller b324 accessible from the local bus a345,
It is once mapped in the memory space of the local bus e313 as shown. The RAMb322 and the controller b324 have different memory spaces between the local bus b325 and the local bus e313.
This address conversion is performed by the controller b324. In addition, the controller c334 performs address conversion for the RAM c332 and the controller c334.

The local bus a345 has a memory space of 1 Mbyte,
ROMa342, RAMa343, controller a344, controller d354, line driver 37, ADPCM361, C
The ODEC 363, the controller e311, the controller c334, the controller b324, the RAMc332, the RAMb322, and the RAMe312 are allocated.
Controller e311, RAMc332, Controller 334, RAMb322,
Controller b324 has local bus e313 and local bus a3
Although the memory space differs from that of the 45, this address conversion is performed by the controller a344.

FIG. 18 shows a controller of the memory sharing unit 31 in FIG.
FIG. 18 is a block diagram illustrating a configuration of e311. Controller e311
Is a system bus control unit 311 that controls the system bus 22.
1. Local bus e control unit 3 for controlling local bus e313
113, RAM simultaneously from system bus 22 and local bus e313
It comprises a RAM control unit 3112 that performs memory contention arbitration when accessing e312, a start flag 3115, a start register 3116, a report flag 3118, a report register 3117, and a local bus e contention arbitration unit 3114. Start flag 3115, Start register 3116
Is a flag that indicates the presence or absence of an operation instruction from the system processor unit 23 to the main processor unit 34, and a register that stores operation instruction information. The report flag 3118 and the report register 3117
Is a flag indicating a report from the main processor unit 34 to the system processor unit 23, and a register for storing report information. The local bus e contention arbitration unit 3114 controls the local bus e3
Bus access contention arbitration is performed so that 13 is used by the main processor unit 34, the sub processor unit 32, and the sub processor unit 33.

The system bus 22 and the local bus e313 are independent asynchronous buses and want to freely access the RAMe312 without being aware of each other. Therefore, the RAM control unit 3112
The access right to the e312 is recognized, and when one of the buses is accessing the RAMe312, the access from the other bus is made to wait.

Next, an operation instruction from the system processor unit 23 to the main processor unit 34 will be described with reference to FIG.
The CPU 2 of the system processor unit 23 sets the transmission data in the RAMe 312, sets the transmission instruction operation information in the activation register 3116, and then sets the activation flag 3115. As a result, an interrupt occurs in the CPUa 341 of the main processor unit 34 via the local bus e313. In CPUa341, this interrupt causes C
Knows that operation has started from PU2. After that, CPUa3
41 saves the contents of the activation register 3116 in the RAMa 343, resets the activation flag 3115, and starts data transmission according to the operation instruction. The start flag 3115 can be read from the CPU 2, and the CPU 2 knows that the main processor unit 34 can accept the next operation instruction by resetting the start flag 3115. This is the main processor section 34
Is an interface for enabling the operation instruction from the CPU 2 to be continuously received without loss. This process is executed promptly as an interrupt process asynchronously with the data communication.

Next, the receiving operation will be described. The CPUa341 instructs the LAPD processing unit 35 to store the received data in the RAMe312. The LAPD processing unit 35 receives the data in the RAMe 312 according to the instruction of the CPUa341, and terminates the receiving operation.
Inform PUa341 that it was received by interruption. CPUa
When the 341 checks that the reception has been normally performed by checking the termination state of the LAPD processing unit 35, the 341 sets the reception report information in the report register 3117 and sets the report flag 3118. This causes an interrupt to CPU2, and CPU2 reports
The report information of 3117 is read and the report flag 3118 is reset. The CPUa 341 knows that the report from the main processor unit 34 can be accepted by the CPU 2 by resetting the report flag 3118.

This is an interface for enabling the CPU 2 to continuously receive the report from the CPUa341 without losing it.

The start register 3116 is a register readable / writable from the CPU 2, and the report register 3117 is a register readable / writable from the CPUa341. In any case, the reason why the reading is possible is that the failure check of the register is performed by the CPU on the writing side.

Next, an outline of the operation of the local bus e contention arbitration unit 3114 will be described. Bus use request signal (REQ) and use permission signal (ACK)
Are a signal requesting the main processor unit 34, the sub processor unit 32, and the sub processor unit 33 to use the local bus e313, and a signal permitting use of the local bus e313. (ADR) is 20 address signals representing a 1-Mbyte space, (DATA) is an 8-bit data signal, (AE) is an address enable signal indicating that (ADR) is enabled, (R / W) Is a read / write signal indicating the read / write direction, (RD
Y) is a ready signal for notifying that (DATA) has become valid, and these signals are common to the main processor unit 34, the sub processor unit 32, and the sub processor unit 33.

FIG. 19 shows an example of a time chart in the case where the main processor unit 34 reads and writes the RAMe 312. The use request signal (REQ
When a) is turned on, the local bus e contention arbitration unit 3114 checks the bus use status, waits for use termination if the local bus e313 is in use, turns on the use permission signal (ACKa), and turns on the main processor. The right to use the bus is given to the unit 34. In the main processor unit 34, when (ACKa) is turned on, (R /
W) Set the signal in the reading direction, output the address of the RAMe 312 to be read out to (ADR), and turn on (AE). The local bus e control unit 3113 controls the (AD) of the local bus e313.
R) constantly monitors whether or not the controller e311 or RAMe312 has been accessed. Now, (AE), (AD
When it is found from (R) and (R / W) that a read request has been made to the RAMe 312, the local bus e control unit 3113 instructs the RAMe control unit 3112 to read data from the RAMe 312. When the data is read, the local bus e control unit 3113
This is output as a (DATA) signal, and the (RDY) signal is turned on for a predetermined period. In the main processor unit 34, at the timing when the (RDY) signal is turned on, (DDY)
ATA). As for the termination method, the local bus e contention arbitration unit 3114 turns off (ACKa) when (RDY) is turned off from on, so that the main processor unit 34 (REQa), (R / W) , (AD
Turn off R) and (AE) immediately. (DATA) turns off at the timing when (RDY) turns off. After the (RDY) is turned off, the local bus e313 is released after a specified time, so that the next use request can be accepted.

A method of writing data from the main processor unit 34 to the RAMe 312 has the same procedure. When the use request signal (REQa) of the local bus e313 is turned on from the main processor unit 34, the local bus e contention arbitration unit 3114 checks the bus use status.
If the local bus e313 is in use, after waiting for the end of use, the use permission signal (ACKa) is turned on to turn on the main processor unit.
Give 34 the right to use the bus. In the main processor section 34, (AC
Ka) is turned on, the (R / W) signal is set in the writing direction, and the address and data of the RAMe312 to be written are written to (AD
R), output to (DATA) and turn on (AE). The local bus e control unit 3113 constantly monitors whether (ADR) of the local bus e313 has accessed the controller e311 or the RAM e312.

Now, when it is found from (AE), (ADR) and (R / W) that a write request has been made to the RAMe 312, the local bus e control unit 3113 instructs the RAMe control unit 3112 to write data to the RAMe 312. The local bus e control unit 3113 turns on the (RDY) signal while data is being written. The local bus e contention arbitration unit 3114 terminates (RDY)
Is turned off from on, (ACKa) is turned off, so that the main processor 34 (REQa), (R /
W), (ADR). Turn off (AE) immediately. (DATA) turns off at the timing when (RDY) turns off. (RD
Y) After turning off the local bus e313 after a specified time
Is released, and the next use request can be accepted.

The controller e311 in FIG. 18 has an adapter identification function,
RAMe312 has a position designation function and a slot identification function.

The adapter identification function is such that a plurality of identical adapters can be mounted on one workstation, or can be used in combination with different adapters. An identification code is assigned to the adapter itself in advance, and this can be read from the system processor unit 23. In FIG. 18, when the controller e311 is mounted on the communication adapter 3, an adapter ID signal 3119 is input from the adapter board to the controller e311. When the CPU 2 issues an adapter ID reading request via the system bus 22, the system bus control unit 3111 uses an adapter ID register (not shown) and sends the adapter ID 3119 signal to the CPU 2 as it is. In this embodiment, the adapter ID is, for example,
Binary "1011" shall be used.

The RAMe position designation function uses the RAMe312
Is capable of dynamically locating an address seen from the system processor unit 23. No.
The system bus control unit 3111 in FIG. 18 has a RAMe pointer. RAMe pointer is RAMe312 viewed from system bus 22
This register indicates the start position of the
Is set first. After setting, the system bus controller
3111 compares the address of the system bus 22 with the RAMe pointer, and when the
A read / write request to 312 is made.

The slot identification function is such that the communication adapter 3 can be inserted into a plurality of slots provided in one workstation regardless of the slot. In FIG. 18, each slot is provided with a unique slot number 221 in addition to the signal of the system bus 22. The system bus control unit 3111 inputs the slot number 221 and changes the addresses of various registers viewed from the system processor unit 23 according to the number. The registers visible from the system processor unit 23 include an adapter ID, a RAMe pointer, a start flag 3115, a start register 3116, a report register 3117, and a report flag 3118 in FIG. For example, as shown in FIG. 20, slot number 0 is "F3" in hexadecimal for a system bus 22 having a memory space of 16 Mbytes.
0000-F31FFF "and thereafter every 8 Kbytes. For the system bus control unit 3111, for example, the same system as that used for the workstation 2050/32 manufactured by Hitachi, Ltd. can be used.

FIG. 21 is a block diagram showing a configuration of the controller b324 in FIG. The controller b324 is connected to the local bus e3
Local bus controller 3241 controlling local bus 13 and local bus b3
Local bus b control unit 3247 for controlling 25, start flag 32
43, start register 3244, report flag 3246, report register 3
245 and an address conversion unit 3242. Start flag 3243,
The start register 3244 is a register for storing a flag indicating the presence or absence of an operation instruction from the main processor unit 34 to the sub-processor unit 32, and operation instruction information.The report flag 3246 and the report register 3245 are provided from the sub-processor unit 32 to the main processor unit. A flag indicating a report to the unit 34 and a register for storing report information.

The address conversion unit 3242 transfers the RAMb322 to the local bus e313.
When accessing from the local bus b3 shown in FIG.
Performs address translation to 25. Since only access from the local bus e313 to the local bus b325 is permitted, the data flow of the address conversion unit 3242 is unidirectional.

Next, an operation instruction from the main processor unit 34 to the sub-processor unit 32 will be described with reference to FIG. The CPUa 341 of the main processor unit 34 sets the transmission data in the RAMe 312 and sets the transmission instruction operation information in the activation register 3244, and then sets the activation flag 3243. This allows the local bus
An interrupt occurs in the sub-processor unit 32CPUb321 via b325. The CPUb321 knows that the operation is started from the CPUa341 by this interrupt. After that, the CPUb 321 saves the contents of the start register 3244 in the RAMb 322 and sets the start flag 3
After resetting 243, data transmission is started according to the operation instruction. The activation flag 3243 can be read from the CPUa341, and the CPUa341 knows that the sub-processor unit 32 can accept the next operation instruction by resetting the activation flag 3243. This is the sub processor section 32
Is an interface for enabling an operation instruction from the CPUa341 to be continuously received without loss. This process is executed promptly as an interrupt process asynchronously with the data communication.

Next, the receiving operation will be described. The CPU b321 instructs the serial controller b323 to store the received data in the RAMe312. Serial controller b323
When receiving the data according to the instruction of the CPUb321 and ending the receiving operation, the CPUb321 notifies the CPUb321 that the reception has been performed by interruption. When checking that the serial controller b323 has been properly received by checking the termination state of the serial controller b323, the CPU b321 sets the reception report information in the report register 3245 and sets the report flag 3246. This causes an interrupt to the CPUa341, and the CPUa341 reads the report information of the report register 3245 and resets the report flag 3246. The CPUb 321 knows that the report from the sub-processor unit 32 can be accepted by the CPUa 341 by resetting the report flag 3246.

This is an interface for enabling the CPUa341 to continuously receive the report from the CPUb321 without losing it.

The start register 3244 is a register readable / writable from the CPUa341, and the report register 3245 is a register readable / writable from the CPUb321. In any case, the reason why the reading is possible is that the failure check of the register is performed by the CPU on the writing side.

Signal 3248 is a controller ID for identifying controller b324 and controller c334. Controller b324
And the controller 334 are the same circuit, and the controller ID3
248 identifies the two. Local bus e control unit 3241
Then, it is determined whether a write / read request has been received from the local bus e313 to the sub-processor unit 32 using the controller ID 3248. The address conversion unit 3242 performs an address conversion as shown in FIG. 17 using the controller ID 3248. Note that the controller ID 3248 can also be read by the program of the sub processor unit 32 through the local bus b control unit 3247.

FIG. 22 is a block diagram showing a configuration of the controller c334 in FIG. The controller c334 is connected to the local bus e3
A local bus e control unit 3341 for controlling the local bus
Local bus c control unit 3347 that controls c335, start flag
3343, a start register 3344, a report flag 3346, a report register 3345, and an address conversion unit 3342. Start flag 334
3, the start register 3344 is a register for storing a flag indicating the presence or absence of an operation instruction from the main processor unit 34 to the sub-processor unit 33, and operation instruction information.The report flag 3346 and the report register 3345 are transmitted from the sub-processor unit 33. Main processor
This is a flag that indicates a report to 34 and a register that stores report information. When the RAM c332 is accessed from the local bus e313, the address conversion unit 3342 performs address conversion to the local bus c335 shown in FIG. Since only access from the local bus e313 to the local bus c335 is permitted, the arrow is unidirectional.

Next, an operation instruction from the main processor section 34 to the sub-processor section 33 will be described with reference to FIG. 22, taking transmission as an example. The CPUa 341 of the main processor 34 sets transmission data in the RAMe 312 and sets transmission instruction operation information in the activation register 3344, and then sets the activation flag 3343. This allows the local bus
An interrupt is generated in the CPU c331 of the sub processor unit 33 via c335. The CPUc331 knows that the operation has been started from the CPUa341 by this interrupt. Thereafter, the CPU c331 saves the contents of the activation register 3344 in the RAMc332, resets the activation flag 3343, and starts data transmission according to the operation instruction. The activation flag 3343 can be read from the CPUa341, and the CPUa341 knows that the sub-processor 33 can accept the next operation instruction by resetting the activation flag 3343. This is the secondary processor
Reference numeral 33 denotes an interface for enabling an operation instruction from the CPUa 341 to be continuously received without loss. This process is executed promptly as an interrupt process asynchronously with the data communication.

Next, the receiving operation will be described. The CPU c331 instructs the serial controller c333 to store the received data in the RAMe312. Serial controller c333
Receives the data according to the instruction of the CPUc331, and when the receiving operation is completed, notifies the CPUc331 of the reception by an interrupt. When checking that the serial controller c333 has been properly received by checking the termination state of the serial controller c333, the CPU c331 sets the reception report information in the report register 3345 and sets the report flag 3346. This causes an interrupt to the CPUa341, and the CPUa341 reads the report information of the report register 3345 and resets the report flag 3346. CPUc331
Knows that the report flag 3346 has been reset, so that the CPUa 341 can accept the next report from the sub-processor unit 33.

This is an interface for enabling the CPUa341 to continuously receive the report from the CPUc331 without losing it.

The start register 3344 is a register readable / writable from the CPUa341, and the report register 3345 is a register readable / writable from the CPUc331. In any case, the reason why the reading is possible is that the failure check of the register is performed by the CPU on the writing side.

Signal 3348 is a controller ID for identifying controller b324 and controller c334. Controller b324
And the controller 334 are the same circuit, and the controller ID3
348 identifies the two. Local bus e controller 3341
Then, it is determined whether a write / read request has been received from the local bus e313 to the sub-processor unit 33 using the controller ID 3348. The address conversion unit 3342 performs the address conversion as shown in FIG. 17 using the controller ID 3348. Note that the controller ID 3348 can also be read by a program of the sub processor unit 33 through the local bus c control unit 33.

FIG. 23 is a block diagram showing a configuration of the controller a344 in FIG. Controller a344 is connected to local bus e3
Local bus e control unit 3441 that controls 13 local bus
It comprises a local bus a control unit 3443 for controlling the a345, an address conversion unit 3442, and an interrupt control unit 3444. When the CPUa341 accesses the controller e311, the RAMc332, the controller c334, the RAMb322, and the controller b324, the address conversion section 3442 performs the address conversion to the local bus e313 shown in FIG. Because it is a unidirectional access from CPUa341,
The data flow of the address conversion unit 3442 is unidirectional.

The interrupt control unit 3444 includes an interrupt signal INTe from the start flag 3115 in the controller e311, an interrupt signal INTb from the start flag 3243 in the controller b324, an interrupt signal INTc from the start flag 334 in the controller c334, and CPUd.
It controls six interrupt signals: a transmission / reception end interrupt signal from the CPU 351, an abnormality notification interrupt signal from the line driver 37, and an ADPCM end interrupt signal from the DMA control unit incorporated in the CPUa 341. The ADPCM end interrupt in the interrupt signal is used to record and play back audio, and the DMA
Use in combination with ADPCM361. The CPUa341 sets the recording / playback time in the DMA control unit in bytes, and the DMA control unit and ADPCM361
To start. The DMA control unit transfers the compressed sound from the ADPCM 361 to the RAMa 312 at the time of recording, transfers the compressed sound at the RAMe 312 to the ADPCM 361 at the time of reproduction, and generates an ADPCM end interrupt signal at the point where the transfer ends. Thus, voice input / output can be performed automatically without the intervention of a program.

The six interrupt signals are logically ORed by the interrupt control unit 3444, and when any of the signals is turned on, an interrupt is generated to the CPU a341 via the local bus a345. The CPU a341 that has received the interrupt reads the interrupt factor from the interrupt control unit 3444 through the local bus a control unit 3443, and performs processing for the generated interrupt. When multiple interrupts occur simultaneously, the CPUa341 assigns a priority,
For a low-priority interrupt, the interrupt is masked by a mask register (not shown) in the interrupt control unit 3444 so as to wait.

FIG. 24 (a) is a block diagram showing a configuration of the line switching circuit 362 of FIG. The line switching circuit 362
621, B1 channel selection circuit 3622, B2 channel selection circuit 362
Consists of three. The register 3621 stores the B1 channel and B2 channel switching information, and is set by the CPU a341 via the local bus a345. As shown in FIG. 7B, the register 3621 is an 8-bit register, and the register information is divided into four bits each, and the B1 channel selection circuits 3622 and B2
The signal is input to the channel selection circuit 3623. In the B1 channel selection circuit 3622, the B1 channel 37 separated by the line driver 37 is used.
3 is connected to one or more of the line 326 of the serial controller b323 and the line 336, CODEC 363, and ADPCM 361 of the serial controller c333 according to the contents of the register 3621. Similarly, the B2 channel selection circuit 3623 converts the B2 channel 374 separated by the line driver 37 according to the content of the register 3621 into the line 32 of the serial controller b323.
6, line 336, CODEC363, ADPC of serial controller c333
Connect to one or more of M361. The lines connected by the B1 channel selection circuit 3622 and the lines connected by the B2 channel selection circuit 3623 are respectively ORed. The B1 or B2 channel can be connected to the handset 365 and simultaneously recorded to the RAMe 312. In this case, the register 3621 may be set to “11000000” or “00001100” in binary.
When recording / reproducing locally with the handset 365 and the RAMe 312, the register 3621 stores “1100
0000 "or" 00001100 "may be set, and the line driver 37 may be instructed to open the B1 channel 373 or the B2 channel 374 to disconnect from the ISDN line 371.

FIG. 25 is a diagram showing an example of mounting the communication adapter 3 of FIG. The communication adapter 3 is housed on a board 50 having a size of 335 mm × 100 mm. Xta11 in the figure is a 19.6608 MHz crystal oscillator.
Output to three CPUs, 1, CPUb321 and CPUc331. Xta12 is 16.
This is a 384MHz crystal oscillator. The waveform is shaped by the controller a344, divided by 2, and the 8.192MHz clock is sent to the ADPCM361 and LA.
Output to the PD processing unit 35. Xta13 is a 12.288 MHz crystal oscillator, and is directly connected to the line driver 37. Horizontal or vertical rectangular components are module-type pull-up resistors for driving circuits. The relay connects the communication adapter 3 to the ISDN line 37 when the communication adapter 3 is not energized.
It is for separating 1 The two pulse transformers are used to cut the DC components of the transmission signal and the reception signal and to couple them by AC. Anonymous IC is a system bus
RAMe312 and part of the address signal of local bus e313
Multiplexer circuit for supplying to the local bus e3
13 is a circuit for directly connecting a part of the address signal of the local bus 13 to the local bus a345. This communication adapter 3 has an ISDN line 371
And a handset connector for connecting the handset 365 and a main body connector for connecting to the workstation 1 main body. When the communication adapter 3 is inserted into an empty slot of the workstation 1, the communication adapter 3 is electrically and logically connected to the system processor unit 23 by this body connector.

In the above embodiment, no ROM is used for the sub-processor units 32 and 33. However, in the embodiment shown in FIG.
It has a method of downloading the program from the main processor unit 34 to the RAM with the b322 and the RAMc332, but if the ROM in which the program of the transmission control procedure is written is used instead of the RAMb322 and the RAMc332, the program is downloaded. Saves time.

If the entire sub-processor section 32 and sub-processor section 33 are replaced by one-chip microcomputers, the package shown in FIG. At this time, as in the present embodiment, the program may be downloaded to the RAMb 322 or RAMc 332, or a ROM in which the above-described program is previously written may be used instead of the RAM.

In the embodiment shown in FIG. 1, since the sub-processor units 32 and 33 do not have a ROM, they are stopped in a reset state when the power is turned on, and cannot be operated until the main processor unit 34 downloads the program. Absent. Therefore, the ROMa 342 in the main processor unit 34 is made usable from the sub processor units 32 and 33. First, the memory space of the ROMa 342 is divided into three. Specifically, the ROMa in the local bus a memory space of FIG. 4 is divided into three, and two of them are mapped to the lowest part of the local bus b memory space and the local bus c memory space, and RAMb, RAMc Is located above it. This corresponds to the address conversion unit 3242 of the controller b324 in FIG. 8 and the address conversion unit 334 of the controller c334 in FIG.
2. The contents of the address mapping of the address conversion unit 3442 of the controller a344 shown in FIG. 10 are changed so that the access to the hardware resources of the main processor unit 34 from the sub-processor units 32 and 33 prohibited in this embodiment is allowed. To controller
Modify b324, controller c334, and controller a344.
In this way, the sub-processor units 32 and 33 can run the program in the ROMa 342 at the same time as the power is turned on, and can self-diagnose or load the program into the RAM by themselves. Further, even if hardware including the RAM fails, failure analysis can be performed using the ROM.

In the embodiment of FIG. 1, the LAPD processing unit 35 is removed.
Control of multiple lines other than ISDN becomes possible, and control of multiple lines becomes possible by adding a sub-processor unit.

In the embodiment of FIG. 1, two lines can be directly connected and controlled by removing the LAPD processing unit 35 and the line driver 37, and the control of a plurality of lines can be performed by adding a sub-processor unit. It becomes possible with a communication adapter. For example, GW in FIG.
13 and 14, if the communication control on the LAN side is processed by the sub-processor unit of FIG.
Since the data can be directly transmitted to the ISDN via the AMe312, the load on the system processor is reduced, and the throughput is improved because there is no data movement.

In FIG. 1, the local bus b325 and the local bus c335 can be made into one bus, and the controller b324 and the controller c334 can be integrated into one. In this case, CP on one bus
Since two U's operate, the performance is slightly deteriorated as compared with the embodiment of FIG. 1. For example, if the processing program of HDLC-BA is loaded in RAMb322 and the processing program of HDLC-UN is loaded in RAMc332 in advance, HDLC-BA and HDLC-UN 2
CPUs can be run at the same time.
One HDLC-BA program of AMb322 can be shared and used by two CPUs. By doing so, it is not necessary to download the program from the RAMe 312 every time the transmission control procedure is changed, and the sub-processor program does not need to be resident in the RAMe 312.

A ROM can be added, and the ROMa342 can be easily used from the CPUb321 or the CPUc331. Further, the sub-processor unit itself can be replaced with a one-chip microcomputer. At this time, the program may be downloaded as in the present embodiment, or a ROM may be used instead of the RAM, and the transmission control procedure may be fixed without replacing the program.

Further, if the line driver 37 is removed, multi-line control for directly connecting and controlling a plurality of lines can be realized.

In FIG. 15, if the local bus b325 and the local bus c335 are one and the same bus, the performance is somewhat sacrificed, but the communication protocol program can be shared.

〔The invention's effect〕

As described above, according to the present invention, since a plurality of communication control units operate independently, high-speed communication can be realized by a different communication procedure for each communication path. In addition, a channel for connecting the communication adapter and higher-level software for controlling the communication adapter is set to one.
The simplification of the interface simplifies the control and control.

[Brief description of the drawings]

FIG. 1 is a block diagram of a workstation showing one embodiment of the present invention, FIG. 2 is a diagram of a network using the embodiment of FIG. 1, and FIG. 3 is an arrangement of the workstation housing of FIG. FIGS. 4 and 5 are diagrams showing a start command and a report command format of the embodiment of FIG. 1, respectively. FIG. 6 is an identifier and service section of the first embodiment.
FIG. 7 is a diagram showing a command list of the first embodiment, FIG. 8 is a start-up sequence diagram of the first embodiment, and FIG. 9 is a data communication of the first embodiment. Sequence diagram, FIG. 10 is a voice communication sequence diagram of the first embodiment, FIG. 11 is a block diagram of a workstation showing another embodiment of the present invention, FIG. 12, FIG. 13 is FIG. Start command, report command format diagram, Fig. 14
11 is a diagram showing the relationship between the identifier and the service unit, the processing unit, FIG.
FIG. 15 is a diagram showing one embodiment of a hardware block configuration used in the embodiment of the present invention, FIG. 16 is a diagram showing a storage state of the shared memory of the embodiment of FIG. 15, and FIG. 17 is a local bus. Diagrams showing the memory space of FIG. 18, FIG. 21, FIG. 22, FIG.
23 and 24 show the detailed configuration of the representative block in FIG. 15, FIG. 19 shows a time chart of the local bus, FIG. 20 shows a memory map corresponding to the slot, and FIG. FIG. 26 is a block diagram showing still another embodiment of the present invention, and FIG. 27 is a diagram showing a start command and the like in the embodiment of FIG. Explanation of reference numerals 1,101: workstation, 4,401: host program,
3,301: Communication adapter, 51: Adapter processing unit, 52, 54, 57
... Data communication unit, 58 ... Voice processing unit, 53,55,59 ... Transmission control unit, 56,561 ... Call processing unit, 5,501 ... Connection port, 23 ... System processor unit, 34 ... Main processor unit, 32,33 ... Sub processor Unit, 35 ... LAPD processing unit, 36 ... B channel control unit, 37 ...
Line driver.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshinori Watanabe 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Microelectronics Equipment Development Laboratory, Hitachi, Ltd. (56) References JP-A-62-82845 (JP, A )

Claims (7)

(57) [Claims] 1. A multi-line communication control method for controlling communication of a plurality of lines, comprising: a communication control group comprising a plurality of communication control units for controlling data independently of each other corresponding to a communication path; A higher-level service group including a plurality of higher-level service units performing services in cooperation with each other, and one channel connecting the communication control group and the higher-level service group are provided, and the plurality of higher-level services are identified by an identifier in a command from the higher-level service group. A multi-line communication control method, wherein one of the communication control units is designated. 2. A multi-line communication control method for controlling communication of a plurality of lines, comprising: a communication control group having a plurality of communication control units and a call control unit for independently controlling data corresponding to communication channels; One channel is provided for connecting the communication control group and higher-level software that controls the communication control group. One of the plurality of communication control groups is specified by an identifier in a command from the higher-level software, and the call is performed. A multi-line communication control method characterized by designating a control unit. 3. A multi-line communication control method for controlling communication of a plurality of lines, comprising: a communication control group having a plurality of communication control units and a call control unit for independently controlling data corresponding to communication channels; Providing one channel for connecting the communication control group and host software controlling the communication control group, designating one of the plurality of communication control groups by an identifier in a command from the host software; A multi-line communication control method, wherein a command of a call from is transmitted to the call control unit via the communication control unit. 4. A multi-line communication control device for controlling communication of a plurality of lines, comprising: a call control unit; and one or a plurality of communication control units that independently control data or voice corresponding to a communication path. A communication adapter having a communication control group, and one channel unit for connecting the communication adapter and host software for controlling the communication adapter. The communication control group or the communication control group or an identifier is included in a command from the host software. A multi-line communication control device, wherein one of the call control units is designated. 5. The multi-line according to claim 4, wherein the channel section between the communication adapter and the host software has a shared memory, and information is exchanged using the shared memory. Communication control device. 6. The host software stores a communication control program in one
5. The communication control unit according to claim 4, wherein the communication control unit has a function of replacing the communication control program of the communication control unit in a stopped state when at least one of the communication control units in the communication adapter is operating. Multi-line communication control device. 7. The multi-line communication control device according to claim 4, wherein said communication adapter has means for multiplexing said plurality of lines, and multiplex lines are controlled by said communication adapter.