JPH0357361A - Isdn composite terminal equipment - Google Patents

Abstract

PURPOSE:To attain the processing corresponding to a call by discriminating a call from a PSTN line and connecting the call to a digital telephone set of a terminal equipment or a G3 facsimile equipment. CONSTITUTION:When an ISDN interface section 6 identifies service class information of information transfer capability obtained at the call connection and identifies the call as a call from a PSTN network, a B channel connects to a G3 facsimile communication control section 4 to apply the G3 facsimile communication. In the case of no 3.1kHz service, but in the case of the speech service, the device is discriminated to be a telephone set connecting to the ISDN line, a digital telephone section 2 connects to the B channel to urge the use of the digital telephone set 2. In the case of no-limit 64kbps service, a caller terminal equipment discriminates the device to be a G4 facsimile equipment and connects the B channel to a G4 facsimile communication control section 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ISDN composite terminal device, and particularly to an ISDN composite terminal device that has both a digital telephone and a 63 facsimile function.

[Prior Art] The basic user network interface of an I SDN line can connect up to eight digital telephones and data communication terminals such as facsimiles to two B channels and one D channel. On the other hand, a composite terminal device that combines a digital telephone, a facsimile, etc., can also have up to eight data transmission functions and can be connected to one basic user network interface.

[Problems to be Solved by the Invention] However, the above composite terminal device can be used as a digital telephone and 0.
If the configuration includes G3 facsimile, when a call is received from the PSTN, it is determined whether the call is from an analog telephone or not.
I couldn't tell if it was from a facsimile.

The present invention solves these problems and is capable of discriminating between calls from PSTN lines and processing the calls accordingly.
Provides SDN composite terminal equipment. [Means for Solving the Problem] In order to solve this problem, the ISDN composite terminal device of the present invention is connected to an ISDN line, and is connected to a digital telephone, a G
This is a compound terminal device that has multiple functions such as G.3 facsimile and G4 facsimile, and when it receives a call from a terminal connected to a PSTN line,
means for determining whether the call is from an analog telephone or a 03 facsimile; and based on the determination,
means for connecting said call to a digital telephone facility or a G3 facsimile facility.

[Function] In this configuration, a digital telephone, a G3 facsimile, and other data transmission functions are combined, and the ISDN
When a multifunction terminal device connected to a line receives a call from a terminal connected to a PSTN line, it determines whether the call is from an analog telephone or a G3 facsimile, and based on that determination, the terminal device's digital telephone Alternatively, since the above-mentioned call is connected to the G3 facsimile, processing corresponding to the call is possible.

[Embodiment] FIG. 1 shows a configuration diagram of an ISDN composite terminal device according to an embodiment of the present invention.6 In FIG. 3 is a handset attached to the digital telephone section, 4 is a G3 facsimile communication control section that performs G3 mode communication control, and 5 is a G4 facsimile communication control section that performs G4 mode communication control. The digital telephone unit 2, G3 facsimile communication control unit 4, and G4 facsimile communication control unit 5 are as follows:
B channel of each ISDN line (64Kbps)
to send and receive data as needed. Further, 6 performs control using the D channel and uses the B channel as a digital telephone section 2.03 facsimile communication control section 4, G4
Connect to the facsimile communication control section 5. ISDN line interface section.

7 is a tone generation unit that generates a ringing tone when an incoming call is received;
8 is a subica, 9.10 is a scanner and printer that input and output images during facsimile transmission and reception, and 1l is a main control unit that controls the entire device, including a CPU 11a for controlling the arithmetic unit, a ROM 1lb for storing programs, and an auxiliary unit. It is equipped with a RAM 11c for storage. FIG. 2 is a flowchart showing the operating procedure of the main control section 1l. The operation will be explained in detail according to Figure 2. First, the terminal device is placed in a standby state. In step S20, the I SDN line waits for an incoming call, and
When there is an incoming call from the SDN line, the ISDN interface unit 6 detects it and proceeds to step S21, returns a response message and connects the call. Step S22. S3
1. In S36, the ISDN interface section 6 identifies the service type information of the information transfer capability obtained when connecting the call. Here, if the information transfer capability is "3.1κHz audio service", proceed to step S23,
The B channel is connected to the G3 facsimile communication control section 4.

Here, the calling terminal can be a G3 facsimile connected to an ISDN line, a G3 facsimile connected to a PSTN line, or an analog telephone. Step S2
If the call is identified as coming from the ISDN network based on the information obtained at the time of call connection in step S25, G3 facsimile communication is directly executed in step S25. In step S24, P
If the call is identified as a call from the STN network, then in step S26 a calling tone (CNG) indicating that the calling station is a G3 facsimile connected to the PSTN line and making an automatic call is emitted.
) is detected. FIG. 3 shows the format of a calling tone (CNG), and in this embodiment, the G3 facsimile communication control unit 4 has a detection function.

If a calling tone (CNG) is detected in step S26, the process advances to step S25 to execute G3 facsimile communication. After waiting for the end of the 63 facsimile communication in step S27, the ISDN line interface section 6 performs the end procedure in step S28 to release the B channel, and returns to the standby state. On the other hand, in step S26, the calling tone (CNG)
) is not detected for a certain period of time, the current call is
It is determined that it is an analog telephone connected to the STN line. Then, the process advances from step S29 to step S30, and once B
The channel is released and the process proceeds to step S32. If it is determined in step S22 that the service is not a 3.1 κHz audio service, and if the information transfer capability is "speech service" in step S31, it is determined that the calling terminal is a telephone connected to an ISDN line. When the process proceeds from step S30 or step S31 to step S32, the digital telephone section 2 of the terminal is connected to the B channel to enable communication, and then a pseudo bell sound is sounded from the speaker 8 through the tone generating section 7, and the digital telephone section Encourage the use of 2.
In step S33, off-hook of the handset 3 by the operator is checked, and when this is detected by the digital telephone section 2, the pseudo-bell tone is stopped in step S34, and the telephone call is enabled. In step S35, the voice caller waits for the end of the call and turns on the handset 3, then proceeds to step S28, performs the end procedure, releases the B channel, and returns to the standby state.

3.1K}lz If it is neither an audio service nor a speech service, and the information transfer capacity is "unrestricted 64 Kbps service" in step S36, the outgoing call log is G4.
It is determined that it is a facsimile, and the B channel is connected to the 04 facsimile communication control unit 5 in step S37. Then, in step S38, the 64 facsimile communication is executed, and in step S39, the process waits for the end of the communication. When the communication is completed, the process advances to step S28, performs the end procedure, releases the B channel, and returns to the standby state. [Effects of the Invention] The present invention provides an ISDN composite terminal device that can distinguish between calls from a PSTN line and process calls accordingly. Specifically, the decoding terminal device, which consists of a digital telephone, G3 facsimile, data transmission function, etc. and is connected to an ISDN line, determines whether a call from the PSTN network is from an analog telephone or a G3 facsimile. By providing a means for connecting the call to the digital telephone of this terminal device or a G3 facsimile based on the determination, the effect is that the call can be connected to the corresponding function without requiring operator operation. be.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an ISDN decoding terminal device according to an embodiment of the present invention, FIG. 2 is a flowchart showing the operation procedure of the main control unit 1l, and FIG. 3 is a diagram showing the format of a calling tone (CNG). In the figure, 1...operation unit, 2...digital telephone unit, 3
...Handset, 4...G3 facsimile communication control section, 5...G4 facsimile communication control section, 6...
ISDN line interface unit, 7...Tone generation unit, 8...Subika, 9...Scanner, 10...
Printer, 11... Main control unit, lla... CPU,
1 l b ROM, 1 1 c RAM.

Claims (1)

[Scope of Claims] A composite terminal device connected to an ISDN line and having multiple functions such as a digital telephone, G3 facsimile, G4 facsimile, etc., which when receiving a call from a terminal connected to a PSTN line,
means for determining whether the call is from an analog telephone or a G3 facsimile, and based on said determination;
and means for connecting the call to a digital telephone function or a G3 facsimile function.
Composite terminal device.