JPH03117065A - High quality voice isdn telephone system terminal - Google Patents

Abstract

PURPOSE:To simplify the speech connection procedure to a high quality mode by only operation of a changeover switch by providing a switching means for resetting to 3.4kHz band at every outgoing, and a recalling means for recalling at the time of switching to 7kHz band by the switching means. CONSTITUTION:The high quality voice ISDN telephone system terminal TE1 is constituted of a network interface part 4, a high quality voice processing part 5, a regular voice processing part 6, control parts 7, 8 and a telephone circuit part 9 containing a handset, a voice storage reproducing part 9a, and an originating number storage part 10. A 3.4kHz/7kHz changeover switch SW1 is formed by a push-button of non-lock, and when it is depressed, it is switched to 7kHz, and its reset is executed by a reset program. Also, it is brought to recalling, when it is switched to 7kHz band by a 3.4kHz/7kHz switching means reset to 3.4kHz band at every outgoing. In such a way, the speech connection procedure to a high quality mode can be simplified.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a high-quality voice ISDN telephone terminal, and particularly to a high-quality voice ISDN telephone terminal that simplifies switching from a normal voice band to a high-quality voice band. Regarding.

[Conventional technology] Conventional high quality voice ISDN telephone terminal TE.

As shown in FIG. 5, the terminal (hereinafter simply referred to as the originating/terminating terminal) is composed of a network interface section 14, a high-quality voice processing section 15, a normal voice processing section 16, control sections 17 and 18, and a telephone circuit section 19.

3,4KHz/
When you operate the 7KHz changeover switch SW2 and make a call, IS
A call setup message for DN protocol layer 3 includes a message indicating that high-quality voice will be used, and is sent to the network (destination terminal). At this time, the control units 17 and 18 set the network interface unit 14 and the telephone circuit unit 19 including a handset and receiver as the high-quality voice processing unit 15.

If the destination terminal has the same high-quality voice function as the originating terminal, it confirms with ISDN that the high-quality voice of the received call setup message will be used, and if consistency is established, the high-quality voice processing unit 15 of the originating terminal active, high quality audio lamp 1
5a and sends a ring tone from ISDN to the destination terminal. If you go off-hook at the destination terminal, you can establish a call with high-quality voice.

[Problems to be Solved by the Invention] Here, call setup of ISDN protocol layer 3 when using a normal voice band (3,4 KHz band) and when using a high quality voice band (7 KHz band)
) Describe the differences in message content. Table 1 shows the differences between the two cases.

Below is one blank space - Here, bearer capabiHty
) is used by the common carrier (NTT) to confirm which relay network can be used for transmission to the other party's terminal. For example, in the case of normal voice band where "information transfer capability" is "voice" and "layer 1 identification" is "μm1aW", NTT can select a relay network including analog with a band of 3.4 KHz. , N
The TT must choose a fully digital transit network.

Also, low layer consistency (low layer com
pati-biljty) is transmitted to the other terminal from Transparent 1 to the other terminal, and is used by the other terminal to confirm communication possibility.

Next, among the originating and receiving terminals, there are those that can only be used in the normal audio band and those that are equipped with high quality audio, and the following combinations are possible.

■ Originating terminal: High quality mode available Destination terminal: High quality mode available ■ Originating terminal: High quality mode available Destination terminal: ISDN terminal without high quality mode) ■ Originating terminal:
Destination terminal with high quality mode: Analog terminal without high quality mode) ■ Originating terminal:
Destination terminal without high-quality mode: Any terminal is possible without high-quality mode) Let's consider confirming communication possibility using the above four methods.

As mentioned above, communication possibility confirmation is based on low layer consistency (low layer consistency), which is transparently transmitted to the other terminal.
1 ayer compatibility).

■ Since both the originating and receiving terminals are equipped with high quality mode, the connection is made in high quality mode.

In case (2), since the first destination terminal does not have a high quality mode, an inconsistency occurs in the communication possibility check, and the call is released using the following two methods.

(a) The destination terminal ignores the incoming call. Therefore, a timeout is taken at the NTT exchange that accommodates the destination terminal, and reason #27 (
disconnection (dis-connect)
) Send the message to the calling terminal.

(b) The destination terminal sends a release complete message including reason #88 (terminal attribute not -1R) to the originating terminal.

■Because the destination terminal is connected to an analog network, the exchange accommodating the originating terminal sends a message for reason #3 (no destination route).
release complete including
The message is sent to the calling terminal.

In case (2), both the originating and receiving terminals are in the normal voice band and are connected in normal mode.

High quality audio ISD with high quality mode as described above
If a call is made in high-quality mode without confirming the other party at the time of making a call with an N telephone terminal, there is a problem that the call cannot be connected as described in (1) and (2) above.

Next, consider a case where, while communicating with the other party in normal mode, it is confirmed that the other party's terminal also has high quality mode.

In this case, 3.4KHz/7KHz changeover switch SW2
You cannot switch from normal mode to high quality mode even if you operate . Because the current call set up in normal mode as ``duplicate'' is 3.4K including NTT's analog
Since it passes through a relay network in the Hz band, digital information cannot be transmitted in high quality mode.

Therefore, if you are talking to the other party in normal mode and want to resume the call in high quality mode, disconnect the current call and go on-hook at the calling/receiving terminal), and then the calling terminal operates the 3.4KHz/7KHz switch and switches to high quality mode. There is a problem with having to call again.

[Purpose of the Invention] This invention was made to eliminate the drawbacks of the conventional high-quality voice ISDN telephone terminals as described above. The purpose of the present invention is to provide a high quality voice ISDN telephone terminal that can simplify the procedure for connecting calls to quality mode.

[Means for Solving the Problems] The high quality voice ISDN telephone terminal according to the present invention has a normal voice band (3,4KHz band) and a high quality voice band (7KHz band).
In high-quality voice ISDN telephone terminals that can make calls in the KI-1z band, the 3.4KHz band is replaced by the 7KHz band.
3.4KHz/7KHz switching means for switching to the 3.4KHz band and returning to the 3.4KHz band for each transmission;
The KHz/7 KHz switching means is comprised of 8- re-calling means for re-calling when switching to the 7 KHz band.

[Embodiment] Hereinafter, an embodiment of the high-quality voice ISDN telephone terminal according to the present invention will be described in detail with reference to FIGS. 1 to 4.

In Figure 1, 1 is the handset, 2 is the liquid crystal display, Kn is the button (n = 1 to 9 are numbers, n = 10 is *, n
= 11 is the number 0, n = 12 is the # button), 3 is the speaker, 5a is the high quality audio lamp, SW is 3.4KHz
/7KHz changeover switch.

FKn (n is 1 to 8) is a function button, FKl is a call redial button, FK is an incoming call redial button in normal voice mode using caller ID, and FK is a high quality phone number storage button. Other function buttons FK4 to FK1 and ``KR'' can realize charge display, automatic answering, speaker call, hold, transfer functions, etc. attached to SDN telephone terminals.In LCD display 2, function buttons FK sleep buttons can be used. Button Kn
Various types of guidance are displayed depending on the operation, and network connection guidance provided by the network is displayed for about 5 seconds each time.

The high-quality voice ISDN telephone terminal TE, as shown in FIG. , a voice storage/playback section 9a, and a calling number storage section 10.

The 3.4 KHz/7 KHz changeover switch 5W1 (hereinafter referred to as changeover switch SW1) is formed by a non-locking push button, and when pressed, it switches to 7KHz, and the return is performed by the changeover switch return program 11 shown in FIG.

When the changeover switch SW1 is pressed, the program indicator PIA provided at bit 31 of the process indicator area PID shown in FIG. 4 is set to 1 (F2). Don't press P
When IA=0, dial with button Kn or press button Kn of speed dial (F,) (F4) (F
, ), digits DSn are placed in the calling number register OR as shown in Figure 4.
Store in M (F6). The interdigit timing of the button Kn is 3 seconds (Fo). In addition, the calling number register ORM
is composed of 0 to 63 words and is provided in the calling number storage section 10 shown in FIG. When PIA=O in the normal mode call, the first call is made in the normal mode using the ORM digit number DSn (F7). A call can be made in normal mode, and during the call, the other party is asked by voice whether or not it is possible to talk in high quality mode, and if the high quality mode is available, the other party is requested to go on-hook. When the other party's terminal goes on-hook and presses F3)-changeover switch SW, PIB=1 (Ft,) and the recall program 12 is started.

When the recall program 12 is activated, the calling number register OR
Check whether the content of M is normal or not (F 1 ,) If it is normal and PIA = 1 or PIB = 1, immediately make a call using the digit number DSn recorded in the calling number register ORM (F 1 ,).
l,), when PIB=1, it is a repeat call, and when PIA=1, it is a call in high quality mode from the beginning. After a re-call, if an interrupt is received from various programs and the high-quality mode is matched with the destination terminal, the network interface section 4, high-quality voice processing section 5, and telephone circuit 9 are connected, and the high-quality voice lamp is activated. 5a lights up, and the liquid crystal display 2 displays for about 5 seconds the fact that the audio is of high quality and the channel being used. At this time, if the high quality telephone number storage button FK3 is pressed, the telephone number for this call will be memorized as being in the high quality mode. When the call ends or goes off-hook, it returns from the interrupt destination and PIA and PIB
is set to 0 (F, ,) and becomes the normal mode. If you make a call in normal mode, go off-hook again and then press (F, 7).
) Press the outgoing redial button FK1 (F1□) to perform redialing in the normal mode. Call redial button FK
If you operate on-hook or button Kn without pressing 1 (Fl,) or after 10 seconds (Ft5) PIA
Set PIB to 0 and return to normal mode. In the normal mode, a call can be made via the normal voice processing section 6, and when making a call, the liquid crystal display 2 displays that it is a normal voice. Therefore, when the selector switch SW1 is not pressed, the normal audio mode is always set.

If the destination terminal has already stored high-quality audio data, this fact will be displayed on the LCD display 2 when making a call.
If necessary, the voice from the voice storage and playback section 9a1- can be used to inform the destination terminal that a call with high quality voice is possible.

[Operation of the Invention] The high-quality voice I5I)N telephone terminal TE having the configuration described in item 1 is normally automatically set to the normal mode.

If you press the button Kn to send the telephone number [03△△△XXXXJ to ISDN directly or by speed dial,
SDN connects to the destination terminal in the audio 3.4KHz band. When it is determined that the destination terminal is in high quality mode, put the destination terminal on hook and press the changeover switch SW1.
0 or [03ΔΔΔ entered in the speed dial list
XXXXJ is sent out, a call can be made in high quality mode, and the high quality voice lamp 5a lights up. Further, the high quality mode [03ΔΔΔXXXXJ B channel is displayed on the liquid crystal display 2.

If the fact that the terminal that sent the calling TD has a high-quality mode function is stored, for example, in the auxiliary block of the speed dial list along with its name, it will be displayed on the LCD display 2 together with the calling ID, and the voice memory and playback will be displayed. The part 9a automatically sends a message to the called party to inform that the high quality mode can be used. Further, when the called terminal is set to speaker call, there is no need to go off-hook, so the call redial button FK2 may be used.

[Effects of the Invention] The high-quality voice ISDN telephone terminal according to the present invention can operate in the normal voice band (3,4KHz band) and the high-quality voice band (7KHz band).
3, 4KHz/7KHz switching means for switching the 3.4KHz band to the 7KHz band and returning to the 3.4KHz band each time a call is made; .4KH
z/7KHz switching means that re-calls when switching to the 7KHz band, so you can switch from normal mode to high quality mode by simply operating the 3.4KHz/7Kl-1z changeover switch. This has the effect of simplifying the call connection procedure.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of a high-quality voice ISDN telephone terminal according to the present invention, FIG. 2 is a block diagram related to FIG. 1, and FIG. 3 is a changeover switch recovery program and recovery program related to FIG. Flowchart of the call program, Figure 4 is the 3rd
FIG. 5 is a block diagram of a conventional high-quality voice ISDN telephone terminal. 10... Telephone number storage unit (re-calling means) 11...
...Changing switch recovery program (switching means) 12... Recall program (recalling means) SW
,”-3,4KHz/7KI-1z switch (switching means)

Claims (1)

[Claims] High-quality voice ISDN that allows calls in the normal voice band (3.4KHz band) and high-quality voice band (7KHz band)
In a telephone terminal, the 3.4KHz band is
3.4KHz/7KHz switching means for switching to the 3.4KHz band and returning to the 3.4KHz band for each transmission;
．． A high-quality voice ISDN telephone terminal comprising a re-calling means for re-calling when the 4 KHz/7 KHz switching means switches to the 7 KHz band.