JPH02265342A - Communication terminal equipment - Google Patents

Abstract

PURPOSE:To eliminate human connection error and to realize quick switching by devising the terminal equipment such that a channel is switched in the communication mode having a designated transmission capability automatically by allowing one equipment to have only to give a changeover request in the case of the changeover to the communication mode with different transmission capability. CONSTITUTION:When communication is implemented with a transmission capability (x) in a communication terminal equipment 12 having a communication function with plural different transmission capabilities and plural communication channels, a communication channel 10 connects to a transmission capability x converter 17 thrown by a communication channel changeover switch 16 via layers 1, 2, 3 and when a mute switch 24 is closed (switch 25 is opened), the channel 10 connects to a transmission information input output circuit 19. When a switching request to the communication mode requiring transmission capability (y) is reached, a slave CPU 20 applies the state control of the line till the switching is finished after the switching request information comes from a master CPU 21 when the transmission with a capability (y) is available and the switch 16 is thrown to the transmission capability (y) converter 18 side via layers 1, 2, 3 and the communication channel 11 connects to the transmission information input/output circuit 19 while a mute signal 25 is in the ON state (switch 24 is turned off).

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of industrial application to which the invention pertains The present invention relates to a communication terminal device having communication functions with a plurality of communication channels and a plurality of different transmission capabilities.

C) Conventional technology and its problems Conventionally, in communication terminal devices such as digital telephones that have multiple channels and have communication functions with multiple different transmission capabilities, transmission capabilities (X) to (y) are changed during communication.
When switching the communication mode, specify the transmission capability (y) information for an empty channel, make a call to the other party, and when the other party answers, confirm that it is the same as the other party you are communicating with, and then The communication path is switched and the channel of transmission capacity (x) is disconnected. On the other hand, when a call is received during communication with transmission capacity (y), the side to be switched checks whether the called party is the same as the other party with which it is communicating, switches the communication route, and transfers the transmission capacity (X). The channel will be disconnected.

In this series of operations, the switching requesting party calls the other party again, confirms the other party, switches the communication route, and disconnects the old channel.
Another disadvantage is that the side requesting wave switching or switching must manually respond to an incoming call, confirm the other party, switch the communication route, and disconnect the old channel.

Furthermore, when switching is performed manually, the timing of switching is different between the switching requesting side and the switching requesting side. ), there were problems such as noise.

(3) Purpose of the Invention In order to eliminate these drawbacks, the present invention, when switching to a communication mode with a different transmission capacity, automatically switches to the communication mode with the specified transmission capacity by simply requesting the switching. The present invention provides a communication terminal device in which a communication path is switched between the two.

The present invention will be explained in detail below using the drawings.

(4) Description of structure and operation of the invention FIG. 1 is a block diagram showing an embodiment of the invention.
0.11 (ISDN line) is two communication channels existing in one l5DN line, 12 is communication terminal equipment connected to the l5DN line, 13 (layer 1) is TTC
It specifies the electrical and physical conditions when connecting a terminal (TE) to a network termination equipment (NT) in accordance with the "Standard JT-1430r I SDN Basic User/Network Interface Layer 1 Specification." This includes the frame structure on the interface, pulse waveforms of transmitted and received signals, wiring configuration specifications, connector settings, etc. 14 (layer 2)
manages the transfer of variable-tone message information exchanged to realize the I5DN service in accordance with the TTC Standard JT-Q921 rI SDN User-Network Interface Layer 2 Specification. 15 (Layer 3) is based on the TTC Standard JT-Q931 rlsDN User-Line Interface Layer 3 Specification, and uses the layer 2 message transfer function to exchange control information between the user and the rope. Controls call setup, maintenance, release, etc. according to user requests. 6 is a communication channel changeover switch that connects and switches two communication channels to each converter; 17 is a transmission capacity (X) converter; 18 is a transmission capacity (Y) converter; 19 is, for example, a voice information transmission In this case, it is a transmission information input/output circuit consisting of a microphone (MIC) and an earphone (EP). 20 is layer 1゜2
．． Slave CPU that controls the line status of No. 3, controls the communication channel changeover switch, communication path mute switch, and communication path changeover switch, and exchanges information with the master CPU.
It is U. A master CPU 21 has a man-machine interface function of reading keyboard information and controlling a display, and controls slave CPUs based on user information. 22 is a display, 23 is a keyboard,
24 and 25 are communication path mute switches.

In FIG. 1, the state in which communication is being performed with the transmission capacity (x, for example, a transmission band of 3.4 KHz) means that the communication channel 10 of the 15DN line is connected to each layer 1.2 of 13, 14, and 15.
．． 3, the communication channel changeover switch 16 changes the transmission capacity (
x) It is connected to the converter 17 side, and is connected to the transmission information input/output circuit 19 with the mute switch 24 on (25 is off). Here, the communication ability (y) is transmitted from the user using means such as the keyboard 23.

For example, when there is a request to switch to a communication mode that requires a transmission band of 7 K II z, switching request information is transmitted from the master CPU 21 to the slave CPU 20 . The slave CPU 20 controls the state of the line from when this switching request information is received from the master CPU 21 until the switching is completed, and when communicating at the transmission capacity (y), the communication channel 11 is 13.14. 15 layers 1, 2 .
3, the communication channel changeover switch 16 changes the transmission capacity (y
) is connected to the converter 18 side, and when the mute switch 25 is on (24 is off), it is connected to the transmission information input/output circuit 19.

Control according to the present invention is performed within this slave CPU 20.

Control by the slave CPU 20 will be explained below.

FIG. 2 is a conceptual diagram of communication mode switching according to an embodiment of the present invention, in which 1 indicates a communication terminal device (A) such as a digital telephone;
and (B) indicate a state in which communication is performed using the transmission capability (x), 2 indicates a state in which the communication mode is switched, and 3 indicates a state in which communication is performed using the transmission capability (y). When initially communicating with transmission capability (x) (state 1), the communication terminal device (A) requests a communication mode switch of transmission capability (y) (state 2), and after the switching is established, transmission Communicate with ability (y) (3
This is the setting.

Figure 3 shows the details of the communication mode switching form 112 in Figure 2, and Figure 4 shows the flow of interactions between the switching requesting side, the switching requested side, and the network when operating according to Figure 3. This is what is shown. Below, FIG. 3 and FIG. 4 will be explained together.

When the communication terminal device (A) is communicating with the communication terminal device (B) in a communication mode with transmission capacity (x),
When the communication mode that requires transmission capability (y) is switched from the communication terminal f(A), "81" in FIG.
If it is determined that there is a switching request, the process proceeds to step 32, and in step S2, a call is made to the party (communication terminal W(B)) with which communication is currently being made on an empty channel with the addition of information on the transmission capability (y). conduct. This corresponds to t2 in FIG.

At this time, in the communication terminal device (B), during communication in S6, "
It is determined that there is an incoming call, and the process proceeds to S7. This S6 corresponds to t6 in FIG. 4. In S7, it is determined whether communication is possible with the communication capability requested by the other party, and if it is "possible", S is sent.
The process proceeds to S8, and in S8 it is determined whether the address of the called party is the same as the address of the currently communicating party, and if it is "the same", the process proceeds to S9. In S9,
"Answer" to the called party. This S9 corresponds to t9 in FIG. 4.

When the communication terminal device (B) responds in S9, the communication terminal device (A) indicates that “the other party has responded” in S3.
It is determined that this is the case, and the process proceeds to S4. This S3 is t in FIG.
Corresponds to 3. In S4, the communication route is switched from the old channel to the new channel.

This S4 is executed at timing t4 in FIG. 4.

Then, in S5, the old channel is "disconnected" and the communication mode switching is completed. This S5 corresponds to 5 in FIG.

On the other hand, the communication terminal f(B), after making the "response" in S9, proceeds to slO and switches the communication route from the old channel to the new channel. This slO is executed at the timing tlo in FIG. 4. After that, the process proceeds to sll, the old channel is "released", and communication mode switching is completed. This sll
corresponds to tll in FIG.

In addition, during this series of operations, when switching between the new and old channels, if the switching timing is different between communication terminal equipment (A) and (B) due to the type and situation of the exchange on the network side, the new channel and the old channel will be switched. When connected, information from the other party may be received as noise due to differences in transmission capabilities, so it is also possible to mute the communication path to prevent noise during switching. FIG. 4 shows t20 and t21 as examples of the timing of muting. This t2
0. The period t21 indicates that the mute switches 24 and 25 in FIG. 1 are turned off.

In the above explanation, slave CPU 20 and master CPU 2
Although six examples have been described in which one is separated from the other, it is also possible to form these with one CPU.

(5) Effects of the Invention As explained in detail above, according to the present invention, when it is desired to switch to communication modes with different transmission capacities, one side only needs to make a switching request, and the channel is automatically designated as an empty channel. It is convenient that a call of the transfer capacity can be connected and the communication route can be switched, and no human intervention is required on either the switching requesting side or the switching requesting side.

Furthermore, since all procedures associated with channel switching, such as calling and receiving calls, confirming the other party, disconnecting, and releasing, are performed automatically, human connection errors are eliminated, and switching can be performed accurately and very quickly.

Furthermore, by muting the call path or adjusting the timing of the signal path during switching, it is possible to prevent unnecessary noise from occurring in communication data and voice signals.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a configuration example of the device of the present invention, FIG. 2 is a flowchart showing the concept of communication mode switching used in the present invention, and FIG. 3 is a block diagram showing the concept of communication mode switching used in the present invention.
FIG. 4 is a time chart showing the flow of network exchanges when the communication terminal device of FIG. 1 is operated. 10, 11 (ISDN line)...Two communication channels, 12...Communication terminal, 13...Layer 1,
14...Layer 2, 15...Layer 3, 16...
Communication channel changeover switch, 17...transmission capacity (x
) converter, 18...transmission capacity (y) converter, 19.
...Transmission information input/output circuit iW, 20...Slave CPU
, 21...Master CPU, 22...Display unit, 23...Keyboard, 24, 25...Communication path mu) 7C inch. Figure 2 Communication terminal! (c) 3I! Communication A bundle device (B) Figure 1 Figure 3

Claims (1)

[Claims] Accommodating a plurality of communication channels and having a plurality of communication functions with different transmission capacities, and changing from a communication mode of transmission capacity (x) to a transmission capacity (y) during communication.
) When making a switching request to switch to a communication mode that requires
), and when the other party answers, the communication route is switched to the channel with the transmission capability (y) and the channel with the transmission capability (x) is disconnected; When requested, if there is an incoming call during communication, it compares the address of the other party on the currently communicating channel with the address of the called party, and determines whether communication is possible with the transmission capability (y) of the incoming call. A communication terminal device having a function of automatically responding when a call is received, switching the communication route to the channel of the incoming call, and opening the channel of the transmission capacity (x) with which the call was initially communicated.