CN1139222C

CN1139222C - Line concentrator for telephone set and communication method of lan

Info

Publication number: CN1139222C
Application number: CNB971982163A
Authority: CN
Inventors: 薄叶伸司; 和; 小西友和; 则; 关根芳则
Original assignee: Oki Electric Industry Co Ltd
Current assignee: Oki Electric Industry Co Ltd
Priority date: 1997-07-24
Filing date: 1997-07-24
Publication date: 2004-02-18
Anticipated expiration: 2017-07-24
Also published as: CN1231788A

Abstract

The present invention enables a sound telephone to contain in an LAN, for example, when a sound telephone 5 carries out the communication to a sound telephone 8, the information exchange and the call control are carried out between a personal computer 1 and a personal computer 4 which are arranged in parallel on the sound telephone 5 and the sound telephone 8 through an LAN concentrator 10, an LAN exchanger 50, and an LAN concentrator 20. All the sound data of the telephone 5 and the telephone 8 carries out the data packing process respectively in data in an MAC frame through TLSs 30, 40 and intermediately continues to LAN-SW interfaces 30a, 40a; the data of the interfaces 30a, 40a is applied to a frame with functions of change and absorption. All the sound data carrying out the data packing process according to MAC addresses of the MAC frame is respectively sent to the telephone 8 and the telephone 5 through the LAN exchanger 50, and the TLAs 40, 30.

Description

The line concentrator that is used for the voice call machine

Technical field

The present invention relates to a kind of line concentrator that is used for the voice call machine of accommodating equipment such as voice call machine by the Local Area Network interface.

Background technology

At present, generally in one was handled official business in-house communication, accommodating by PBX (Private Branch Exchange, inner exchanging machine) of voice call machine undertaken, and data communication is then undertaken by LAN, and both are independently.Particularly in recent years, along with the reduction of personal computer prices such as (hereinafter to be referred as PC) and the raising of performance, PC has popularized and has come, and almost can mention in the same breath with the voice call machine.Along with the appearance of this situation, people wish that in-company communication system can become the environment that LAN and voice call machine can both add.

But, in existing intracompany communication, have following problem.

Though can unify to constitute in-company fabric among the LAN by the voice call machine is housed in, but promptly periodically just in time opposite with the character of sudden and high reliability that mainly is the data communication carried out on LAN with real-time as " sound " distinctive character, it is very difficult to unite.As a result, the relevant devices of PBX equipment and LAN need be set, also need the distribution of 2 relevant therewith systems in intra-company.

The objective of the invention is to the unification of in-company communication fabric in LAN, need not PBX and can realize accommodating of voice call machine.

Summary of the invention

In order to address the above problem, among the application first invention is for being used for the line concentrator of voice call machine, this line concentrator that is used for the voice call machine is arranged on LAN, this LAN comprises: the LAN switch that a plurality of interfaces of accommodating is switched connection, and be connected with above-mentioned LAN switch by above-mentioned interface respectively and accommodate a plurality of LAN line concentrators that carry out the equipment of data communication by LAN, this is used for being constructed as follows of line concentrator (hereinafter referred to as TLA, i.e. Telephone LAN Adapter) of voice call machine.

As the TLA of the 1st invention, have 1 group that the LAN interface that is connected with above-mentioned LAN converting means and 1 or many voice call machines be connected or organize voice call machine interface more.In addition, among this TLA, the voice data that the voice data of receiving and send to them from above-mentioned 1 or many voice call machines is transformed into the mac frame with regular length and is transformed into above-mentioned mac frame is interrupted to above-mentioned LAN interface.

Among the application the 2nd invention is: in the TLA of the 1st invention, except the LAN interface that above-mentioned LAN switch is connected, realize the 2LAN interface that sends and receive between CPU that also is provided with in this TLA self inside and the above-mentioned LAN line concentrator.

The 3rd invention is: among the TLA of the 1st invention, the line signal of analog subscriber is transformed into the signal of the regulation that meets the call control protocol on the LAN, to accommodate pseudo subscriber terminal.

The 4th invention is: among the TLA of above-mentioned the 1st invention, except the LAN interface that above-mentioned LAN switch is connected, also be provided with the 2LAN interface that the CPU to this TLA self inside sends and receives; And carry out TCP/IP and call out control sequence, to be transformed into TCP/IP packet or UDP/IP packet (User Data Protocol/Internet protocol from the voice data that above-mentioned many voice call machines of accommodating are received, User DatagramProtocol/Internet Protocol), these TCP/IP packets of reception or the UDP/IP packet that sends through above-mentioned 2LAN interface.

The 5th invention is: be connected with the router that this 2LAN interface is connected with LAN external network or the selection of above-mentioned LAN line concentrator on the above-mentioned 2LAN interface among the TLA of the 4th invention.

Adopt above-mentioned the 1st invention, because the formation of TLA as mentioned above, relaying was given LAN interface after the voice data that receive and that send to them of the voice call machine from be housed in TLA was transformed into mac frame, and was added on the LAN switch by this LAN interface.Switching by the LAN switch connects, and its voice data can be delivered on other voice call machines by other TLA.

Adopt the words of the 2nd invention, since in the TLA of the 1st invention, be provided with different with the LAN interface that is connected of above-mentioned LAN switch, between the CPU of device self inside and above-mentioned LAN line concentrator, realize sending and the 2LAN interface of reception, so can be in the 6th invention, realize that by being housed in personal computer in the LAN line concentrator or work station the calling of carrying out for the voice call machine that is housed among the TLA controls.

Adopt the 3rd invention, the analog subscriber circuit signal transformation that TLA sends the common acoustic telephone set becomes the call control protocol among the TCP/IP.That is, call out control, also can carry out controlling with the calling of telephone set in TLA one side without personal computer or work station.

Adopt the words of the 4th and the 5th invention, because TLA is transformed into TCP/IP packet or UDP/IP packet to the voice data of receiving from the voice call machine, and the above-mentioned 2LAN interface of process sends and receives these TCP/IP packets or DUDP/IP packet, therefore, can send with the network of LAN outside and receive through router from the voice call machine.

Description of drawings

Fig. 1 is the formation block diagram of sound switching system among the LAN of expression the 1st embodiment of the present invention.

Fig. 2 is the block diagram of the formation of the TLA30 in the presentation graphs 1.

Fig. 3 is the schematic diagram that is used for the mac frame form that key diagram 1 adopted.

Fig. 4 is the schematic diagram of the operating sequence of presentation graphs 1.

Fig. 5 is the precedence diagram as the LAN communication means of the 2nd embodiment of the present invention.

Fig. 6 is the formation block diagram as the TLA of the 3rd embodiment of the present invention.

Fig. 7 is the schematic diagram of a variation of presentation graphs 1.

Fig. 8 is the additional block diagram that the TLA of function is arranged of expression.

Embodiment

Sound switching system among this LAN comprises: a plurality of personal computers as the information processing kind equipment (PC) 1,2,3,4; The

voice call machine

5,6,7,8 that is provided with accordingly with them; Accommodate 2

LAN hubs

10,20 of these personal computers 1～4; 2 TLA30,40 of

tut telephone set

5,6,7,8 have been accommodated.Under some occasion, what the LAN hub was accommodated is work station, rather than personal computer 1～4.

Personal computer

1,2,3,4 has IEEE 802.3 LAN interface, as 10base-T communication port and TCP (UDP)/IP communication protocol.By meeting the LAN interface 1a of IEEE 802.3,2a's each PC1,2 links to each other with LAN hub 10 respectively, PC3,4 LAN interface 3a by same IEEE 802.3, and 4a links to each other with LAN hub 20.Each

voice call machine

5,6,7,8 has the words of sending function respectively and is talked about function, but not necessarily must possess the transmission receiving function of call control information.

The 2 line formula digital audio telephone sets of group more than each TLA30,40 has respectively interfaces (below, abbreviate sound interface as) and meet 2 LAN interface that IEEE 802.3 stipulates.Each

voice call machine

5,6 links to each other with TLA30 respectively by sound interface 5a, 6a that TLA30 had, and voice call machine 7,8 then is connected with TLA40 by sound interface 7a, the 8a that TLA40 had respectively.

Each

LAN hub

10,20 links to each other with LAN switch 50 by LAN interface 10a, the 20a that meets IEEE 802.3 regulations.

30a, a 40a in 2 LAN interface that each TLA30,40 all has links to each other with a port of LAN switch 50 respectively.Below, we are called the LAN-SW interface with interface 30a, 40a.Another

interface

30b, 40b in 2 LAN interface that each TLA30,40 is had are the 2LAN interface, link to each other with a port on each

LAN hub

10,20 respectively.Below, we are called the LAN-HUB interface to these

ports

30b, 40b.

LAN switch 50 is the connector between the LAN, has the frame function of exchange of using in the data communication that LAN carries out, and it exchanges handover operation according to the MAC Address in the LAN frame.What link to each other with this LAN switch 50 is a NS device 51, and the connection between them is undertaken by the interface 51a of IEEE 802.3 regulations.

Storage has databases such as client mac address among the LAN and terminal recognition number in the NS device 51.For from the client among the LAN such as PC1～5, LAN10,20, TLA30,40 inquiry, NS device 51 has the function that database information is provided.

TLA30 has TLA control unit 30A and interface module unit 30B.

TLA control unit 30A has: the LANC circuit 31 that links to each other with LAN-SW interface 30a, the PF circuit 32 that links to each other with this LANC circuit 31.AAL1 circuit 33 is connected to PF circuit 32, and HWIF circuit 34 and PLL circuit 35 are connected to ALL1 circuit 33.The output of above-mentioned PLL circuit 35 also is connected to HWIF circuit 34.Constitute input/output relation between HWIF circuit 34 and the interface module unit 30B.Also be provided with CPU36 and LAN circuit board 37 in the TLA control unit.CPU36 has the formation of control LANC circuit 31, PF circuit 32, AAL1 circuit 33, HWIF circuit 34 and LAN circuit board 37.LAN circuit board 37 is connected with LAN-HUB interface 30b.On the other hand, in interface module unit 30B, be provided with TI circuit 38.TI circuit 38 is connected on the HWIF circuit 34, and simultaneously, this TI circuit 38 also is connected with sound interface 5a by circuit corresponding unit 39.Accommodating a plurality of telephone sets except that voice call machine 5 among the interface module unit 30B.Therefore, though omit to some extent among Fig. 2, TI circuit 38 and circuit corresponding unit 39 are to be provided with accordingly with above-mentioned a plurality of telephone sets.Each TI circuit 38 also is subjected to the control of CPU36.The internal structure of TLA40 is identical with TLA30.

Fig. 3 is the schematic diagram that is used for the mac frame form of key diagram 1 use.

In the present embodiment, adopted MAC (Media Access Control) frame as frame format.As shown in Figure 3, mac frame is by preceding prelude (PA), SFD (Start FrameDelimiter, the start frame delimiter), hardware DA (Destination Address, end address), hardware SA (Source Address, source address), ETYPE, data portion and FCS (FCS) constitute.In the sound switching system shown in Fig. 1, voice data is carried out the data packetize and handles.In the voice data bag frame, the data division of mac frame is suitable for ATM (Asynchronous Transfer Mode, asynchronous transfer mode) AAL1 type (JT1.363) frame.ATMAAL1 type frame by the ATM head, have the drift absorption function SAPDU-H field and voice data section constitute.Following one side is with reference to figure 3, Yi Bian describe the function of each several part in the TLA30.

LANC circuit 31 is the circuit that produce and decompose mac frame.LAN circuit board 37 is configured for carrying out IEEE 802.3 LAN interface that control information is communicated by letter with other PC etc.PF circuit 32 is used for removing MAC Address the mac frame that receives from LANC circuit 31, takes out the ATMAAL1 type frame among Fig. 3, and it is added on the AAL1 circuit 33.In addition, PF circuit 32 has in AAL1 circuit 33 MAC Address that adds the CPU36 appointment on editor's ATMAAL1 type frame, the length that sends data and control bit (CTL) and delivers to function in the LANC circuit 31 afterwards.

AAL1 circuit 33 will be transformed into ATMAAL1 type frame from the voice data that interface module unit 30B receives with time division multiplexing mode, deliver to PF circuit 32 then; Simultaneously, will be transformed into the time division multiplexing interface from the ATMAAL1 type packet that the PF circuit receives, and deliver to interface module unit 30B.AAL1 circuit 33 has the function of the voice data bag time of advent poor (that is so-called " drift ") that absorption causes by asynchronous interface.

HWIF circuit 34 for interface module unit 30B between dock, use PLL circuit 35 to produce the synchronizing signal that is used to carry out the time division multiplexing transmission, and carry out the transmission and the reception of sound and control data with time division multiplexing mode with interface module unit 30B.In addition, HWIF circuit 34 keeps sending signals such as silent mode, maintenance or tone ringer for the voice call machine from the CPU36 data downloaded; Simultaneously, also has the function of carrying out the PAD modulation for the data download that receives from PC.TI circuit 38 bases among the interface module unit 30B are carried out the frame format conversion of circuit from the synchronizing signal of HWIF circuit 34, and carry out the transmission and the reception of sound and control data with time division multiplexing mode and this HWIF circuit 34.

Fig. 4 is the operation flow sheet among Fig. 1, there is shown during sending direction and the processing, has wherein also added the interface number among Fig. 1 on the sending direction.Below, on one side with reference to Fig. 4, explanation on one side sends, converses and operation when hanging up from the voice call machine 5 that is set up in parallel with PC1 to the voice call machine 8 that is set up in parallel with PC4.Here, be equipped with the MAC Address that adds respectively on TLA30,40 LAN-

SW interface

30b, 40b and LAN-SW interface 30A, the 40A, the telephone number that uses in the CTL position of the voice call machine of accommodating among each TLA30,40 by the VPI/VCI number in the ATM head among Fig. 3 or this figure is determined.Also added the MAC Address that need not other special conditions of contract on PC or workstation1～4 and the NS device 51 respectively.In addition, in the present embodiment, the use of communicating by letter (than defending oneself) the tcp/ip communication agreement on the interface beyond interface 5A, 30A, 40A and the 8A shown in Fig. 4.

The calling that at first is used to communicate by letter is controlled.

The user of voice call machine 5 inquires the information (MAC Address, the IP address that comprise PC4) of PC4 and the information (comprising the LAN-HUB interface 40B of TLA40 and the MAC Address of LAN-SW interface 40A, the number of voice call machine 8) of telephone set 8 from PC1 to NS device 51, and obtains these information (A among Fig. 4).That carry out above-mentioned inquiry use is interface 1A, 10A and the 51A that is connected with LAN switch 50 with LAN hub 10.

The PC1 that is subjected to above-mentioned information sends calling and setting request (SET-UP) information through interface 1A, 10A, 20A and 40A to PC4.Contain the MAC Address of LAN-SW interface 30A of TLA30 and the number of sound telephone set 5 in this calling and setting solicited message.

PC4 asks processing with it as calling for after receiving above-mentioned calling and setting request SET-UP information, interface 4A, 20A, 10A and the 1A of use and calling and setting request reversed in order send " breathing out " information (ALERT).When PC4 detect the user by modes such as keyboard input carry out reply the time, promptly send (CONN) information of replying to PC1.In current the transmission, use be interface 4A, 20A, 10A and the 1A identical with the information of breathing out.In addition, PC4 also sends to the number information of the MAC Address of the number information of voice call machine 8, TLA30 and voice call machine on the LAN-HUB interface 40B of TLA40 for to the selected route of the voice data on the direction of voice call machine 8 → voice call machine 5.The current transmission owing to being undertaken, so that use is interface 4A, 20A and 40B by LAN switch 50 and LAN hub 20.Above-mentioned information is given CPU36 by the LAN circuit board 37 in the TLA40.

TLA40 is after receiving above-mentioned information, on corresponding voice data, adding the MAC Address of LAN-SW interface 30A of TLA30 and the number of sound telephone set 5 with the number of voice call machine 8, then, send to LAN switch 50 through LAN-SW interface 40A with form shown in Figure 3.

On the other hand, receiving that from after the replying of PC4 PC1 delivers to the number information of MAC Address that is used for number information, TLA40 to the voice call machine 5 of the selected route of the voice data on the direction of voice call machine 5 → voice call machine 8 and voice call machine 8 the LAN-HUB interface 30B of TLA30 through interface 1A and LAN hub 10.LAN circuit board 37 in these information vias TLA30 is added on the CPU36.

TLA30 is after receiving above-mentioned information, with the corresponding voice data of the number of voice call machine 5 on add the MAC Address of LAN-SW interface 40A of TLA40 and the number of voice call machine 8, send to LAN switch 50 with the form shown in Fig. 3 then.(B among Fig. 4).

Like this, the voice data bag has just been finished through the Route Selection of interface 5A, 30A, 40A and 8A, has just entered talking state (C among Fig. 4) between voice call machine 5 and the sound telephone set 8.

When the user of voice call machine 5 wants to finish conversation, will hang up (DISC) information from PC1 and give PC4 through interface 1A, 10A, 20A and 4A.Simultaneously, send the indication that discharges connection to TLA30.The indication that TLA30 is sent adds to LAN switch 50 through interface 1A, 10A, delivers to TLA30 from this LAN switch 50 through interface 10A, 30B again.

TLA30 stops to send and the corresponding voice data bag of the number of voice call machine 8 after receiving the indication that discharges connection; And in the descending voice data of voice call machine 8, send silent mode by the HWIF circuit 34 among the TLA30.On the other hand, the PC4 that receives the information of hanging up sends the indication that discharges connection to TLA40.Later operation identical with TLA30 (D among Fig. 4).

The formation of voice data frame (data in the channel) is described below.

The interface module unit 30B that docks with the LAN hub shown in Fig. 2 connects with a large amount of voice call machines (for example, 32 circuits), and the frame format on these circuits has B1 channel and D channel.Voice data sends and receives by the D channel by B1 channel, other control informations.TL circuit 38 among the interface module unit 30B carries out frame format and time division multiplexing interface (to call " expressway " in the following text) conversion on the circuit under the effect from the synchronizing signal of HWIF circuit 34.

According to the indication of CPU36, HWIF circuit 34 can be selected to carry out with the relaying of AAL1 for descending acoustic channel or send silent mode, maintenance, ring back tone adjusting data.AAL1 circuit 33 is transformed into ATMAAL1 frame (JT-1.363) with the voice data that 30B sends here through HWIF circuit 34.At this moment to carry out the poor change time of advent of voice data bag in the non-synchronous network in the conversion.What carry out data packetize processing in AAL1 circuit unit 33 is the scope of showing out as (i) among Fig. 3.

PF circuit 32 adds DA, SA, ETYPE and the CTL position of calling out when the taking place mac frame of the IEEE 802.3 of appointment on the process voice data of processing data packets according to the indication from CPU36 in AAL1 circuit 33, send to LANC circuit 31 then.The scope shown in (ii) is the scope of carrying out the data packetize in PF circuit 32 among Fig. 3.LANC circuit 31 is added PA, SFD, FCS on this basis, carry out as among Fig. 3 (iii) shown in 802.3 mac frameizations of IEEE completely after, send to LAN switch 50.

In sum, the 1st embodiment of the present invention has following advantage.

(1) in the LAN that comprises LAN switch 50 and the

LAN hub

10,20 of accommodating equipment such as PC1～4 or work station,, just can not need PBX just can carry out audio communication by adding TLA30,40.

(2) relevant with calling out control information is controlled by PC1～4, so need not in the voice call machine 5～8 to send 10 numerical keys selecting signal to use, the formation of telephone set can be very simple.

(3) the voice data bag frame that after the data packetize, sends again among the LAN, employing be that ATMAAL1 type frame data portion, shown in Fig. 3 of distributing to mac frame constitutes.Therefore, compare with the situation of distributing with (for example) UDP/IP frame, the house-keeping of voice data bag is less, and throughput can be improved.Simultaneously, the protocol processes ratio is easier to, and to handle the time of delay produce fewer because of carrying out the data packetize.In addition, the outer Route Selection of device need not router and handles, simultaneously, the processing that can be undertaken on the mac frame rank by LAN switch 50, like this, Route Selection can reduce required time of delay, and the debatable especially deterioration by the sound quality that postpones to cause can reduce in audio communication.

In addition, the voiced frame of distributing to the mac frame data portion has absorbed the change that is produced by ATMAAL1, thereby can absorb the variation that LAN switch 50 converges the time of advent of voice data bag under the state, guarantees at LAN in the dialogue of carrying out nature.

(4) owing to possess LAN-SW interface 40A independently mutually with LAN-HUB interface 40B, can not clash with the data of other PC or work station, therefore, the voice call machine accommodates quantity and can calculate at an easy rate on each device.For instance, the operation throughput of circuit is as being 6.144Mb/s when being dual 10base-T all, and an interface can guarantee to accommodate 94 circuits when each channel of voice data was 64Kb/s.

(5) by setting up the needs that the TLA 30, the 40... that are housed in the LAN switch 50 can adapt to high capacity simply, the scale expansion is with respect to for the conditional PBX of the heap(ed) capacity of accommodating circuit also being easy the realization.

The 2nd embodiment

In the 1st embodiment, problem that just can not call telephone set 8 when existing the power remove as PC4.That is, in the 1st above-mentioned embodiment, the calling relevant with the communication between voice call machine control is undertaken by PC1,4, is off state as the power supply of the PC4 of incoming call side, and calling can't be carried out.The 2nd embodiment of the present invention a kind ofly carries out improved LAN communication means to the problems referred to above.

Just (B2) represented part different with Fig. 4 of expression the 1st embodiment among Fig. 5, the represented part of other (A), (B), (C) is identical with the 1st embodiment.Below a part to (B2) is described.In addition, short of special expression, below said " information " be meant the content identical with the 1st embodiment.

PC1 sends calling and setting request (SET-UP) information by after the order shown in (A) receives the information of voice call machine 8 among Fig. 5 to PC4, starts a software timer (connection waiting timer) T0 simultaneously.During the power remove of PC4, will not reply (ALERT, CONN) for the calling and setting request and return.When overtime (TO) took place T0, PC1 sent calling and setting request (HS-SET-UP) to TLA40.Comprise the number of MAC Address, the voice call machine 5 of the LAN-SW interface 40A of TLA40 in the information of sending, by necessary address (MACIP etc.) among the LAN of the number of the voice call machine 8 of incoming call and PC, deliver to LAN hub 20 through

interface

1a, 10a, 20a, deliver on the TLA40 by interface 40B again.

TLA40 after receiving calling and setting request (HS-SET-UP), with its be identified as to voice call machine 8 go into to exhale, and the down channel by sound interface 8A is sent the ring signal of ringing to voice call machine 8.Simultaneously, send one back to PC1 and that is to say, inform that it is just at call telephone set 8 just at call signal (HS-ALERT).The loopback of this information is undertaken by interface 40B, LAN hub 20 and interface 20A, 10A, 1A.

On the other hand, voice call machine 8 is receiving that ring rings after the signal, and the ring of ringing is notified the user to have to call out and come.During user's off-hook of voice call machine 8, voice call machine 8 is through the ascending control channel notice TLA40 of sound interface 8A: the user is off-hook.

TLA40 detects voice call machine 8 behind the off-hook, send (HS-CONN) information of replying to PC1, and on the voice data corresponding with the number of voice call machine 8, add after the number of the MAC Address of LAN-SW interface 30A of TLA30 and sound telephone set 5, send to LAN switch 50 with the form shown in Fig. 3.

On the other hand, PC1 selects the voice data on the direction that is used to voice call machine 5 → voice call machine 8 number, the MAC Address of TLA40 and the information such as number of voice call machine 8 of the voice call machine 5 of route to send to the LAN-HUB of TLA30 interface 30B after receiving response message.

TLA30 adds the MAC Address of LAN-SW interface 40A of TLA40 and the number of sound telephone set 8 on the voice data corresponding with the number of voice call machine 5 after receiving these information, send to LAN switch 50 by the form shown in Fig. 3 then.

In sum, among superincumbent the 2nd embodiment, even arrive because callee's PC power source also can use the control channel notice of callee's voice call machine interface 8A to have to call out for off state, and can detect and reply, therefore it had both had the advantage identical with the 1st embodiment, even also can call out when the power supply of PC is turned off simultaneously, no matter when all can carry out audio communication to voice call machine 8 grades.

The 3rd embodiment

Among the superincumbent the 1st and the 2nd embodiment,, but can not accommodate general analog subscriber phone though the voice call machine do not need can take the easy structure of 10 numerical keys.The 3rd embodiment here can be housed in general analog telephone among the LAN.

The TLA here has the TLA control unit identical with Fig. 2 and the different interface module 60 with Fig. 2.

Interface from interface module 60 to the outside is the line interface of general analog subscriber, and terminals such as the regular analog phone machine of popularizing, G3 facsimile machine all can be connected with this interface at present.

Interface module 60 has for the analog subscriber circuit in the switch necessary so-called BORSCHT function, powers up, operations such as ring, dial impulse (PB/DP) supervision.Select the reception and the transmission of the relevant information with calling out control such as signal reception result between the CPU36 among interface module 60 and the TLA control unit 30A.CPU36 with interface module 60 between receive and send, with call out the calling control sequence of controlling on the LAN that relevant information conversion becomes TCP/IP etc. (identical) with the 1st embodiment.Like this, interface module 60 and CPU36 have just constituted and have had the device that will the signal (as: off hook signal, dialing signal, bell signal and on-hook signal etc.) relevant with the calling control of analog subscriber circuit be transformed into the function of the call control protocol among the LAN.That is CPU36 has the function identical functions with PC1～4 described in the 1st and the 2nd top embodiment.

Therefore, in this 3rd embodiment of the present invention, general analog subscriber can be accommodated in the voice call machine in LAN, general purpose terminal, analog telephone, G3 fax etc. can also be accommodated.

The 4th embodiment

For the TLA shown in Fig. 2 or Fig. 6 30,40, function that will be transformed into UDP/IP (perhaps TCP/IP) packet and the function that these packets is sent and receive through LAN-HUB interface 30B, 40B have been increased among the TLA among the 4th embodiment from the voice data of a plurality of voice call machines of being accommodated.

When possessing such function, can carry out the voice data that obtains from interface module 30B or 60 is transformed into the processing of UDP/IP (perhaps TCP/IP) packet by the TLA control unit 30A among (for example) TLA30.The information relevant with calling out control sends and receives with the tcp/ip communication agreement.The UDP/IP that obtains in this processing (perhaps TCP/IP) packet is delivered to LAN-HUB interface 30B.If this LAN-HUB interface 30B goes up and is connected to router, packet is just delivered to external network by this router.

In sum, among superincumbent the 4th embodiment, owing to connected the device that can carry out Route Selection by the IP address of router etc. on the LAN-HUB interface, therefore the voice call machine 5～8 that can pass through among IP network (as the internet) and the LAN communicates.

In addition, the present invention is not limited to the above embodiments, can also make all distortion.These variation can have several below (for example).

(1) in the sound switching system in Fig. 1, NS device 51 is connected to LAN switch 50.In fact, be connected arbitrarily, also can be suitable for

LAN hub

10,20.

(2) the NS device 51 among Fig. 1 can interiorly be ensconced among the TLA30,40.

(3) above-mentioned each TLA30,40 and each

LAN hub

10,20 all be to constitute by independent device, in fact, with in keep TLA30 and LAN hub 40, TLA40 and LAN hub 20 and incorporate devices and constitute and also be fine.

The variation of Fig. 1 shown in Fig. 7, shown in it is integrated TLA40 and LAN hub 20 and device that constitute.So, can make distribution simplification between integrated apparatus and personal computer on the other side (PC) 4 and the voice call machine (TEL) 8.Constitute a pair of voice call machine and just can realize being connected by 8 core cables of a standard, very simplification with the connector (as RJ-45) on being located at integrated apparatus with PC.There are 6 to be used for communication in 8 cores.

In addition, this integrated apparatus can be used as simple LAN hub and uses under the state that the voiceless sound telephone set joins with it.

(4) in the superincumbent description, accommodated a plurality of TLA30,40 among the LAN, in fact,, also can obtain the effect identical with the above embodiments even a unique TLA only is set at LAN.At this moment, the LAN-SW interface of a TLA is used (need not LAN switch 50) with the ways of connecting of turning back.

(5) Fig. 8 is the block diagram that has increased the TLA of function.

Except the function described in the 4th embodiment, further increase sound compression and fax transmission-receiving function can also for TLA, make it more effectively to be used.Among Fig. 8, in the input of the LAN-HUB interface side of TLA30, be provided with the facsimile modulation/demodulation unit 70 harmony sound press unit 80 that contracts.Facsimile modulation/demodulation unit 70 has the formation of carrying out conversion between analog-and digital-, can send and receive by external networks such as router and G3 facsimile machines.

Sound compression unit 80 has the function that voice data is compressed, and has the maximum compression rate that is (for example) 8kb/s to the maximum.By sound compression unit 80 is set, can and external network between the voice data that sends and receive compressed.

As detailed above, adopt above-mentioned the 1st invention, can in the LAN that need not equipment such as PBX, carry out audio communication.

Adopt the 2nd invention, can simplify the structure of voice call machine.Therefore, just can not clash with other personal computers or work station, the voice call machine number that each device is accommodated also can easily calculate.

Adopt the 3rd invention, can accommodate general pseudo subscriber terminal.Therefore, also just can accommodate the devices such as G3 facsimile machine that are connected with the analog subscriber interface.

Adopt the 4th and the 5th invention, just can carry out audio communication with the LAN outside.

Adopt the 6th invention, can simplify the structure of voice call machine.

Adopt the 7th invention, even when the power supply of the personal computer of the calling control of carrying out the called party or work station is turned off, also can carry out audio communication.

And comparatively speaking adopt the 8th invention,, can be adapted to high capacity simply the conditional PBX of the heap(ed) capacity of accommodating circuit.

Adopt the 9th invention, compare with the situation that adopts (for example) UDP/IP frame to distribute, the protocol processes ratio is easier to, and carries out that the data packetize is handled and time of delay of causing is also few.In addition, the outer Route Selection of device can be handled without router, but finish by the processing of LAN switch on the mac frame rank, Route Selection is less caused time of delay, and promptly the deterioration by the sound quality that postpones to cause is also few for distinctive problem in the audio communication.In addition, the change of the time of advent of voice data bag guarantees can carry out the dialogue of nature in LAN in the time of can also absorbing the LAN switch and converge.

Claims

1. line concentrator that is used for the voice call machine, this line concentrator that is used for the voice call machine is arranged on LAN, this LAN comprises: the LAN switch that a plurality of interfaces of accommodating is switched connection, and be connected with above-mentioned LAN switch by above-mentioned interface respectively and accommodate a plurality of LAN line concentrators that carry out the equipment of data communication by LAN, this line concentrator that is used for the voice call machine is provided with:

The LAN interface that is connected with above-mentioned LAN switch; And

Be connected with 1 or many voice call machines 1 group or organize voice call machine interface more,

It is characterized in that: receive and the voice data that sends is transformed into mac frame by above-mentioned 1 or many voice call machines, and the voice data that is transformed into mac frame is given above-mentioned LAN interface by relaying.

2. the line concentrator that is used for the voice call machine as claimed in claim 1, it is characterized in that, except with LAN interface that above-mentioned LAN switch is connected, also be provided with at this and be used for realizing between the CPU of line concentrator inside of voice call machine and the above-mentioned LAN line concentrator 2LAN interface that sends and receive.

3. be used for the line concentrator of voice call machine according to claim 1, it is characterized in that, in this device, the line signal of analog subscriber is transformed into the signal of the regulation that meets the call control protocol on the LAN, to accommodate pseudo subscriber terminal.

4. the line concentrator that is used for the voice call machine as claimed in claim 1, it is characterized in that, except above-mentioned and LAN interface that the LAN switch is connected, also be provided with the 2LAN interface that this CPU that is used for line concentrator self inside of voice call machine is sent and receives; And will be transformed into TCP/IP packet or UDP/IP packet, and send and receive these TCP/IP packets or UDP/IP packet through above-mentioned 2LAN interface from the voice data that above-mentioned many voice call machines of accommodating are received.

5. as being used for the line concentrator of voice call machine as described in the claim 4, it is characterized in that, be connected with on the above-mentioned 2LAN interface this 2LAN interface and LAN external network or above-mentioned LAN line concentrator are selected the router that is connected.