JPH08340349A - Connection control method and communication processing unit using the method - Google Patents

Abstract

PURPOSE: To attain automatic connection of a terminal by performing connection to the terminal or a printer based on whether or not a port monitor is monitoring a logic channel in the case where the logic channel is of a permanent virtual circuit. CONSTITUTION: A packet switching network 200 is connected to a host computer 100, the switching network 200 has a PAD 201, and TTY terminals 300A, 300B are connected to the computer 100 via a line 11 and the PAD 201. The TTY terminal 300C is connected to the computer 100 via the PAD 201 and a line 12. Furthermore, a printer 400 is connected to the computer 100 via the PAD 201 and a line 13. If it is decided that a logic channel is of a virtual circuit, the connection to the terminals 300A, 300B is conducted. If it is decided that a logic channel is in of a permanent virtual circuit, the connection to either the terminal 300C or the printer 400 is conducted depending on whether or not the port monitor is monitoring the logic channel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection control method and a communication processing apparatus using the method, and in particular, connection control to a terminal and a printer via a packet assembling / disassembling (PAD) function provided in a packet switching network. And a communication processing device for connecting to a terminal and a printer via a PAD function provided in the packet switching network via the packet switching network.

[0002]

2. Description of the Related Art Conventionally, when a terminal that connects via a PAD function provided in a packet switching network and a host computer that connects to the packet switching network are connected in a TTY procedure, the terminal computer is conventionally used to connect the terminals. The connection (incoming call connection) is being made after waiting for the connection request to.

When the terminals are connected under the same wiring, the same PAD parameters are set. Here, the PAD parameter is a parameter that defines the operation of the PAD function, and the PAD recall,
Echo presence / absence, packet transmission character type, packet transmission timing, accessory device control, service signal transmission, PAD operation selection at break signal reception, data discard, CR
Padding after (Carriage Return), number of lines printed, communication speed, data reception control, insertion of LF (Line Feed), padding after LF are set items.

[0004]

As described above, in the above-mentioned conventional technique, since the PAD parameters of the terminals under the same line are set to the same, the screen display, the control of the transmission timing, the control of the output destination, etc. are performed. There is a problem that each user cannot control as desired.

Further, since only an incoming call connection can be made from the terminal, the user has to input the host computer name of the connection destination every time the power is turned on or reset, which is troublesome.

The present invention has been made in view of such circumstances, and the terminals are automatically connected even if an incoming call connection is not made from the terminals, and terminals under the same line are connected to different terminals.
It is a first object to provide a connection control method capable of connecting with AD parameters.

Further, the present invention provides a communication processing apparatus in which a terminal is automatically connected without making an incoming call connection from the terminal, and terminals under the same line can be connected with different PAD parameters. This is the second issue.

[0008]

[Means for Solving the Problems]

<< First Connection Control Method of the Present Invention >> In order to solve the first problem described above, the first connection control method of the present invention is directed to a terminal that goes through a packet assembling / disassembling function provided in a packet switching network, and The connection control method for the printer is configured as follows (corresponding to claim 1). FIG.
FIG. 3 is a principle flow chart of the first connection control method.

That is, it is determined whether the logical channel, which is a management unit of packet transfer to the terminal and the printer, is a partner selection connection or a partner fixed connection (S1). Then, when it is determined that the logical channel is the connection for selecting the other party, the incoming call connection control from the terminal is performed (S2).

On the other hand, when it is determined that the logical channel is the fixed connection, the port monitor is connected to either the terminal or the printer based on whether the port monitor is monitoring the logical channel. Control (S
3).

The packet assembling / disassembling function is performed by the PAD.
Is a function of. Here, PAD is a non-packet terminal (NPT) that communicates in character mode.
A kind of "protocol converter" that allows an inal) and a packet terminal (PT) to interact.
And has the following basic functions of and.

Packet assembly / disassembly, transfer and X. 25
Management of virtual call, etc. Operation control of NPT (data transfer, processing of control signal, etc.) Also, the partner selection connection is called VC (Virtual Circuit).

The fixed connection of the other party is PVC (Perman
ent Virtual Circuit), which means that the communication partner is always fixed to one partner. According to this PVC, communication is possible without performing a procedure such as calling the other party's line number.

<< Second Connection Control Method of the Present Invention >> The second connection control method of the present invention is configured as follows in order to solve the above-mentioned first problem (corresponding to claim 2). ).

That is, in the first connection control method, when it is determined that the logical channel is a fixed connection, the connection is controlled to the terminal when the port monitor is being monitored, and the port monitor is connected. Is monitored, the connection control to the printer is performed.

<< Communication Processing Device of the Present Invention >> The communication processing device of the present invention is configured as follows (corresponding to claim 3) in order to solve the above-mentioned second problem. FIG. 2 is a principle configuration diagram of the communication processing device.

That is, in a communication processing device for connecting via a packet switching network to a terminal and a printer via a packet assembling / disassembling function provided in the packet switching network,
The environment information setting unit 1 and the driver unit 2 are provided.

The environment information setting unit 1 determines at least the type of logical channel which is a unit of packet transfer management for the terminal and the printer, whether or not the port monitor is monitored for the logical channel, and the operation of the packet assembling / disassembling function. Set the information about the specified parameters. The packet assembling / disassembling function corresponds to one function of the PAD as in the first connection control method. The parameter that defines the operation corresponds to a so-called PAD parameter.

The driver section 2 controls the connection to the terminal and the printer by the first or second connection control method based on the information set by the environment information setting section 1.

[0020]

According to the first connection control method of the present invention, it is determined whether the logical channel is a partner selected connection or a partner fixed connection, and the incoming call connection control from the terminal is performed for the logical channel that is the partner selected connection. Done. On the other hand, with respect to the logical channel that is the fixed connection, the connection control for either the terminal or the printer is performed based on the presence / absence of monitoring by the port monitor.

According to the second connection control method of the present invention, in the first connection control method, when the port monitor is being monitored for the logical channel which is the fixed connection, the terminal monitor Connection control is performed. On the other hand, when the port monitor is not monitoring, the printer is connected and controlled.

According to the communication processing apparatus of the present invention, connection control is performed for the terminal and the printer by the first or second connection control method based on the information set by the environment information setting unit 1.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. << Structure of Embodiment >> (Overall Structure) FIG. 3 is an overall structure diagram of the embodiment. As shown in the figure, this embodiment has a host computer (hereinafter, host) 100. A packet switching network 200 is connected to the host 100, and the packet switching network 200 has a PAD 201. Then, via the PAD 201, the TTY terminal 300A
And 300B are connected to the host 100 by the line 11. Also, via the PAD 201, the TTY terminal 30
0C is connected to the host 100 by the line 12. Further, the printer 400 is connected to the line 1 via the PAD 201.
3 to the host 100.

Here, the TTY terminals 300A and 300B
As described above, a plurality of terminals may be connected under the same wiring, or one terminal may be connected under one wiring such as the TTY terminal 300C.

(Functional Configuration) FIG. 4 is a functional configuration diagram of the embodiment. As shown in FIG.
It has the functions of -1) to (B-5). (A-1) Environment setting process 115 (A-2) Stream link command issuing process 11
1 (A-3) TTY terminal control command issuing process (hereinafter also referred to as port monitor) 112 (A-4) Printer request command issuing process 1
13 (A-5) X. 29 Control information notification command issuing process 114 (B-1) File management unit 121 (B-2) Stream compatible module unit 122 (B-3) Standard stream terminal line control module unit 1
23 (B-4) driver section 124 (X.29 driver section 12
4A and X. 25 driver unit 124B) (B-5) network common control unit 125 (A-1) to (A-5) are programs that operate as processes, and (B-1) to (B-5) are kernels. Is a program that operates as.

The above (A-1) to (B-5) will be described below. (A-1) Environment Setting Process 115 The environment setting process 115 performs environment settings such as logical channel types of the physical lines 11 to 13, presence / absence of monitoring by the port monitor 112, and PAD parameters.

Logical channel type and port monitor 1
The presence or absence of monitoring by 12 is stored in a terminal control information file (not shown) in the format shown in FIG. Here, the format format shown in FIG. 5 is “device name”.
(“Device name”), “line name” (“line nam
e ”),“ X.25 host name ”(“ X.25 host nam
e ”),“ logical channel number ”(“ LC type ”),“ baud rate (line speed) ”(“ baudrate ”) and“ whether the port monitor 112 is monitored ”(“ ttymon ”) To be done. In FIG. 5, “x2” on the fourth line from the top
"9pad001" is an example of a device name, "line0" is an example of a line name, "host20" is an example of an X.25 host name, "recv" is an example of a logical channel type, and "9600". Is an example of the baud rate, and “yes” is an example of whether or not the port monitor 112 is monitored (in this case, monitored).

On the other hand, the PAD parameter value is stored in the PAD parameter file (not shown) in the format shown in FIG. Here, the format shown in FIG. 6 is “line name” (“line name”), “device name”
(“Dev name”), “PAD parameter” (“p1 to p2
2 ”),“ Packet transmission time ”(“ ot ”),“ Number of delivery confirmation interval packets ”(“ ws ”),“ Protocol ID ”
(“Pid”), “Protocol ID for calling PVC” (“cpi
d ”),“ logical channel number ”(“ lc ”),“ transmission side throughput value ”(“ stpc ”),“ reception side throughput value ”(“ rtpc ”),“ transmission side packet size ”(“ sp
s ”),“ receiver packet size ”(“ rps ”),“ sender window size ”(“ sws ”),“ receiver window size ”(“ rws ”), and“ DTE address ”(“ dte
a ”) composed of 15 elements.

(A-2) Stream link command issuing process 111
29 driver unit 124A and X. 25 driver section 124
B and the network common control unit 125 to the physical line 1
A command to combine in a stream is issued every 1 to 13.

(A-3) TTY terminal control command issuing process 112 TTY terminal control command issuing process 112
Issues a command for notifying the terminal 300 of control information by I / O control.

The TTY terminal control command issuing process 112 is also called a port monitor. (A-4) Printer request command issuing process 1
13 The printer request command issuing process 113 issues a command for notifying the printer 400 of control information.

(A-5) X. 29 control information notification command issuing process 114 X. 29 Control Information Notification Command Issuing Process 114
Is the terminal control information stored in the terminal control information file and the PA stored in the PAD parameter file.
If the D parameter information is X. A command for notifying the 29 driver unit 124A is issued.

(B-1) File Management Unit 121 The file management unit 121 manages files used inside the kernel. (B-2) Stream compatible module 122 The stream compatible module 122 converts an I / O control call supported by an old type terminal control driver into an I / O control call supported by a terminal I / O interface. Convert to.

(B-3) Standard Stream Terminal Line Control Module Unit 123 The standard stream terminal line control module unit 123 controls the line of the terminal 300.

(B-4) Driver Unit 124 29 driver unit 124A and X. If the logical channel type is VC, the incoming call connection process from the terminal 300 is performed, while the logical channel type is PVC.
If the port monitor 112 is being monitored, the TTY terminal 300 is requested to connect,
If the port monitor 112 is not being monitored, a connection request is issued to the printer 400.

Here, when making a connection request, the PVC unique information defined in the PAD parameter file created by the environment setting process 115 is set in the connection request packet shown in FIG. And X. 29 driver unit 12
4A to X. 25. The connection request primitive is transmitted to the 25 driver unit 124B.

The connection request packet, as shown in FIG.
"PRIM_type", "DSET_length", "DSET_offset",
"CONN_flags", "QOS_length", "QOS_offset",
It has areas called "partner DTE address setting area" and "QOS setting area". Each area will be described below.

In the "PRIM_type" area, a connection request primitive is set. The beginning of this area is the variable "b_rp
The destination station address setting area length is set in the "DSET_length" area referenced by the pointer value of "tr".

The offset of the partner station address setting area is set in the "DSET_offset" area. Nothing is set in the "CONN_flags" area.

The option setting area length is set in the "QOS_length" area. The offset of the option setting area is set in the “QOS_offset” area. The partner station address is set in the "partner DTE address setting area" area.
At the beginning of this area, set the pointer value of the variable "b_rptr" to "DS
It is referred to by a value obtained by adding the set value of the “ET_offset” area. Further, the area length of this area is set to the set value of the “DSET_length” area.

Option information is set in the "QOS setting area" area when a connection is established with a parameter different from the control information of the defined line. . At the beginning of this area, the pointer value of the variable “b_rptr” is set to “QOS_
It is referred to by the value obtained by adding the set value in the "offset" area.
Further, the area length of this area is set to the set value of the “QOS_length” area.

The option information includes "opt_type" and "opt_
It has areas called "length" and "option value." Each area will be described below. Option types are set in the "opt_type" area.

The length of the option value field is set in the "opt_length" area. The setting value corresponding to the option type is set in the "option value" area.

FIG. 8 shows an example of option information.
As shown in the figure, the option type includes the throughput on the transmission side, the throughput on the reception side, the packet size on the transmission side, the packet size on the reception side, the window size on the transmission side,
There are a receiving side window size, a VC / PVC connection type, a logical channel, and the like.

(B-5) Network Common Control Unit 125 The network common control unit 125 controls the external packet switching network 200 so that the driver unit 124 can perform common input / output.

<< Operation of Embodiment >> As an operation example of the embodiment,
The incoming call connection processing sequence, the printer connection sequence, and the terminal connection sequence will be described.

In the following description, the port monitor 112 will be described.
The printer request command issuing process 113 will be described with a higher name. X. 29 Driver unit 1
24A operates in two stages, upper and lower, but it operates them as X.264. 29 upper and X.29. The description will be divided into 29 lower parts. Further, in FIG. 25 from the driver unit 124B to the network common control unit 125. X.25 mainly processed by the H.25 driver unit 124B. 25 parts, and X. Two
A description will be given separately for the control unit that mainly processes the parts other than the five parts.

(A) Incoming Call Processing Sequence An incoming call processing sequence will be described with reference to FIG. From the top X. When a "link" command is issued to the upper 29 units (S
701), X. The upper 29 parts are X. A "link request request" is issued to the lower part of 29 (S702). X. 29 lower part,
Based on the “link request request” in S702, the X. A "link request" is issued to 25 copies (S703).

Next, X. 25 parts from X. When the "normal link acceptance notification" is returned to the lower part of 29 (S704),
X. The lower part of X.29 is X.29. A "link completion notice" is sent to the upper 29 units (S705). X. 29 upper part is S704
The "normal end" is notified to the upper layer which has issued the "link" command based on the "link completion notification" (S706).

Next, X. When an "open" command is issued to the upper part of the upper layer 29 (S707), the X. The upper 29 parts are X. While issuing an "incoming call request request" to the lower part of 29 (S708), the upper part which issued the "open" command is notified of "open completion" (S709).

Next, when the TTY terminal 300 makes an "incoming call" (S710), the control unit receives the incoming call, and the X.X. Report to 25 copies (S711). X. Based on the incoming call reception in S711, X. An "incoming call connection instruction" is issued to the upper 29 units (S712).

Then, X. The upper 29 parts are X. A "call-in connection instruction reception notification" is issued to the lower part of 29 (S713).
X. The subordinate part of the X.29 subordinates the X. "Affirmative response to the incoming call connection instruction" is issued to the 25th copy (S716).

X. The twenty-fifth unit issues a "connection instruction" to the control unit based on the output in S716 (S717). The control unit receives the “call” based on the “connection instruction” in S717.
Notify the TY terminal 300 of "incoming call acceptance" (S71
8).

In addition, X. The 25th copy is based on the output in S716. "Normal acceptance response" is sent to the lower part of 29 (S
719). X. Based on the “normal acceptance response” in S719, the lower part of X.29. 29 "Upcoming call acceptance completion notification"
Is notified (S720).

Here, in the steps from S716 to S719, X. 29 "Data transmission request" issued to the upper rank
(S714) is temporarily suspended (S715). Next, in order to perform the data transmission suspended in S715,
X. The upper 29 parts are X. A "data transmission request request" is issued to the lower part of 29 (S723). X. 29 lower part is S72
X.3 based on “Data transmission request request”. A "data transmission request" is issued to 25 copies (S724).

Then, X. The twenty-fifth unit requests the control unit to transmit data (S725). The control unit transmits “data” to the TTY terminal 300 based on the request of S725 (S726).

The "data transmission request" held in S715 is released after S723 (S727). (B) Printer Connection Sequence The printer connection sequence will be described with reference to FIG.

From the top, X. When a “link” command is issued to the upper part of the X.29 (S801), the X. The upper 29 parts are X.
A "link request request" is issued to the lower part of 29 (S802).
X. Based on the “link request request” in S802, the lower part of X. Issue a "link request" to 25 copies (S80
3).

Next, X. 25 parts from X. When the "normal link acceptance notification" is returned to the lower part of 29 (S804),
X. The lower part of X.29 is X.29. Twenty-five copies are notified of "PVC designation" (S805).

Next, X. 25 parts from X. When a "PVC designated affirmative response" is issued to the lower part of 29 (S806),
X. The lower part of X.29 is X.29. "Link request request complete" is issued to the upper 29 units (S807). And X. The upper 29 units notify “normal end” to the upper unit which has issued the “link” command based on “completion of link request request” in S807 (S808).

Next, X. When an "open" command is issued to the upper part of the X.29 (S809), X.29. The upper 29 parts are X. Issue an "incoming call request request" to the lower part of 29 (S81
0). X. The lower 29 parts are “incoming call request request” in S810.
Based on X. Issue "call connection instruction" to copy 25 (S8)
11).

Next, X. The unit 25 issues a "calling connection instruction" to the control unit based on the "calling connection instruction" in S811 (S812), and X. A "normal acceptance response" is issued to the lower part of 29 (S814). Then, the control unit S812.
A "reset request" is issued to the printer 400 based on the "calling connection instruction" (S813).

Next, when "reset confirmation" is returned from the printer 400 to the control unit (S815), the control unit causes the X.
Twenty-five copies are notified of "call connection completed" (S816).
X. The 25th copy is X. An "affirmative response to the calling connection instruction" is issued to the lower part of 29 (S817). X. Based on the “acknowledgement to call connection instruction” in S817, the lower part of the X. The upper 29 units are notified of “incoming call request request completed” (S818).

Next, X. The upper layer of 29 notifies the upper layer which has issued the “open” command of “open completion” (S819), and X. A "data transmission request request" is issued to the lower part of 29 (S820). After this S820, data transfer becomes possible (S824).

Next, X. Based on the “data transmission request request” of S820, the lower part of X.29. A "data transmission request" is issued to 25 copies (S821). X. 25 copies are S821
The control unit is requested to transmit data based on the "data transmission request" (S822). The control unit transmits data to the printer 400 based on the request of S822 (S82).
3).

(C) Counterpart fixed connection sequence The partner fixed connection sequence will be described with reference to FIGS. 11 and 12. From the top X. When a "link" command is issued to the upper part of the X.29 (S901), the X. The upper 29 parts are X. Two
A "link request request" is issued to the lower 9 parts (S902).
X. Based on the “link request request” in S902, the lower part of X. Issue a "link request" to 25 copies (S90
3).

Next, X. 25 parts from X. When the "link normal acceptance notification" is returned to the lower part of 29 (S904),
X. The lower part of X.29 is X.29. Twenty-five copies are notified of "PVC designation" (S905).

Next, X. 25 parts from X. When a "PVC designated affirmative response" is issued to the lower part of 29 (S906),
X. The lower part of X.29 is X.29. "Link request request complete" is issued to the upper 29 units (S907). And X. The upper 29 units notify "normal end" to the upper unit which has issued the "link" command based on "completion of link request request" in S907 (S908).

Next, X. When an “open” command is issued to the upper part of the X.29 (S909), the X. The upper 29 units notify “open completed” to the upper layer that has issued the “open” command (S910).

Next, X. When the “message notification” is issued to the upper part of the 29 upper layer (S911), the X. The upper 29 units notify “message notification completed” to the upper unit that has issued the “message notification” (S912).

Next, X. When an "open" command is issued to the upper part of the X.29 (S913), the X. The upper 29 parts are X. While issuing an "incoming call request request" to the lower part of 29 (S915), the upper part which issued the "open" command is notified of "open completion" (S914).

Then, X. The lower part of the X.29 part of the X.29 based on the “request for incoming call request” in S915. A "calling connection instruction" is issued to the 25th copy (S916). Next, X. 25 copies are S91
Based on the "calling connection instruction" of No. 6, the "calling connection instruction" is issued to the control unit (S918), and X. A "normal acceptance response" is issued to the lower part of 29 (S917). Then, the control unit issues a “reset request” to the TTY terminal 300 or the printer 400 based on the “call connection instruction” in S918 (S919).

Next, X. When a “message notification” is issued to the upper part of the X.29 (S920), X.29. The upper 29 units notify "message notification completed" to the upper layer that has issued the "message notification" (S921).

Similarly, X. When a “message notification” is issued to the upper part of the 29 upper layer (S922), X.
The upper 29 units notify “message notification completed” to the upper layer that has issued the “message notification” (S923).

Here, in steps S923 to S929, X. 29 "Data transmission request" issued to the upper rank
(S924) is temporarily suspended (S925). Next, when "reset confirmation" is returned from the TTY terminal 300 or the printer 400 to the control unit (S926), the control unit causes the X. Twenty-five copies are notified of "call origination connection completed" (S92).
7). X. Based on the “calling connection completion” in S927, the 25th copy. 29 "Lower response to call connection instruction"
Is output (S928). X. Based on the “acknowledgement to the calling connection instruction” in S928, the lower part of X.29. The upper part of 29 is notified of "incoming call request request completed" (S929).

Next, X. The upper 29 parts are X. A "data transmission request request" is issued to the lower part of 29 (S930). This S
After 930, the suspension of S925 is released (S93
4). Next, X. Based on the “data transmission request request” of S930, the lower part of X.29. A "data transmission request" is issued to 25 copies (S931). X. The twenty-fifth unit requests the control unit to transmit data based on the “data transmission request” of S931 (S932). The control unit transmits data to the TTY terminal 300 or the printer 400 based on the request of S932 (S933).

<< Effects of the Embodiment >> The effects of this embodiment will be described with reference to FIGS. FIG. 13 shows the TTY terminal 30 before and after the incoming call connection processing which is also performed in the conventional technique.
The display example of 0 is shown. The left side of the figure is a display state before the incoming call connection processing, and the right side of the figure is a display state after the incoming call connection processing.

In the incoming call connection processing, when the host name (“C_HOST1” in this case) to log in is input from the terminal side,
The message "logi" indicating that the login was accepted
n: ”is displayed below the host name.

On the other hand, FIG. 14 shows a display example of the TTY terminal 300 before and after the fixed partner connection processing according to this embodiment. The left side of the figure is the display state before the fixed remote connection process,
The right side of the figure is the display state after the fixed partner connection process. It should be noted that before the partner fixed connection process here corresponds to, for example, before the terminal power is turned on, and after the partner fixed connection process corresponds to, for example, after the terminal power is turned on.

In the fixed partner connection process, the message "login:" indicating that the login has been accepted is automatically displayed by turning on the power of the terminal without inputting the host name for logging in. This is because even if the TTY terminal 300 is under the same wiring, different PAD parameters can be set, so that a connection request is issued from the host 100 side and a permanent virtual connection (PVC) can be performed.

[0081]

According to the first and second connection control methods of the present invention, with respect to a logical channel which is a fixed remote connection,
Since the connection control for either the terminal or the printer is performed based on the presence or absence of monitoring by the port monitor, the terminal is automatically connected even if an incoming call connection is not made from the terminal, and the PAD with different terminals
You can connect with parameters.

In particular, according to the second connection control method of the present invention, it is possible to select either the fixed connection of the terminal or the fixed connection of the printer. According to the first communication control device of the present invention, since the driver unit for performing connection control using the first and second connection control methods is provided, the terminal is automatically connected even if an incoming call connection is not made from the terminal. , And terminals under the same line can be connected with different PAD parameters.

[Brief description of drawings]

FIG. 1 is a principle flow of a connection control method of the present invention.

FIG. 2 is a principle configuration diagram of a communication processing device of the present invention.

FIG. 3 is an overall configuration diagram of an embodiment.

FIG. 4 is a functional configuration diagram of the embodiment.

FIG. 5 is an example of terminal control information according to the embodiment.

FIG. 6 is an example of a PAD parameter of the embodiment.

FIG. 7 is an example of a connection request packet according to the embodiment.

FIG. 8 is an example of option information of a connection request packet according to the embodiment.

FIG. 9 is an incoming call connection processing sequence according to the embodiment.

FIG. 10 is a printer connection sequence according to the embodiment.

FIG. 11 is a partner fixed connection sequence (No. 1) of the embodiment.

FIG. 12 is a partner fixed connection sequence (2) of the embodiment.

FIG. 13 is a diagram showing a display example of a terminal before and after an incoming call process.

FIG. 14 is a diagram showing a display example of a terminal before and after a fixed partner connection process.

[Explanation of symbols]

1 ... Environmental information setting unit 2 ... Driver unit 11-13 ... Line 100 ... Host computer (host) 111 ... Stream link command issuing process 112 ... TTY terminal control command issuing process 113 ... Printer request command issuing process 114 ... X. 29 control information notification command issuing process 115 ... environment setting process 121 ... file management unit 122 ... stream compatible module unit 123 ... standard stream terminal line control module unit 124A ... 29 driver section 124B ... X. 25 driver section 125 ... network common control section 200 ... packet switching network 201 ... PAD 300 ... terminal 400 ... printer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Naoshi Kurasawa, Inventor Naofumi Kurasawa 2-4-19 Shin-Yokohama, Kohoku Ward, Yokohama City, Kanagawa Prefecture Fujitsu Program Giken Co., Ltd. No. 19 Fujitsu Program Giken Co., Ltd.

Claims (3)

[Claims] 1. A connection control method for a terminal and a printer via a packet assembling / disassembling function provided in a packet switching network, wherein a logical channel serving as a management unit of packet transfer to the terminal and the printer is a partner selection connection or a partner. If it is determined to be a fixed connection, if the logical channel is determined to be the other party selected connection, the incoming call connection control from the terminal is performed, if the logical channel is determined to be the other party fixed connection Includes a connection control method for controlling connection to either the terminal or the printer based on whether or not a port monitor is monitoring the logical channel. 2. When it is determined that the logical channel is a fixed connection, the connection is controlled to the terminal when the port monitor is being monitored, and when the port monitor is not being monitored. The connection control method according to claim 1, further comprising controlling connection to the printer. 3. A communication processing device for connecting to a terminal and a printer via a packet assembling / disassembling function provided in a packet switching network via the packet switching network, at least managing packet transfer to the terminal and the printer. An environment information setting unit for setting information on the type of logical channel as a unit, presence / absence of port monitor monitoring for the logical channel, and information regarding parameters defining the operation of the packet assembling / disassembling function, and the environment setting unit set by the environment setting unit. Claim 1 based on information
Alternatively, the communication processing apparatus is provided with a driver unit that performs connection control with respect to the terminal and the printer by the connection control method according to Item 2.