JPH02222250A - Isdn digital telephone system terminal equipment - Google Patents

Abstract

PURPOSE:To facilitate callback by providing a caller number storage means and using a caller number by a caller number notice service for dial information calling back the caller. CONSTITUTION:A RAM 4 storing a caller number in the automatic answering mode, a CPU 5 and a speech circuit 8 are provided in terminal equipments TE1-TE8. Then a cursor is displayed at the head of a display device 2 in the callback program provided in the RAM 4 in the arrival of an incoming call and when the caller number is stored in the RAM 4, the caller number and arrival date or the like are displayed on the display device sequentially in the order of the display number. Moreover, cursor keys S1 and S2 are operated and a desired caller number is entered by the cursor, and then a # button is depressed to call back the caller number indicated by the cursor. Thus, a trouble identifying the caller by the voice and indexing the caller number from a memory provided separately or the like and calling back the caller is saved and the caller is called back easily.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to ISDN digital telephone terminals.

In particular, the present invention relates to an ISDN digital telephone terminal having a function of recalling a calling party.

C Prior art and problems to be solved by the invention] Conventional IS
As shown in FIG.
1 indicates #).

A caller number is displayed on a display 12 made up of a liquid crystal or the like. If the ISDN digital telephone terminals 11 are bus-wired to the network terminal gtDsU, eight ISDN digital telephone terminals 11 can be connected to one subscriber line. An ISDN address consists of a 15-digit ISDN number consisting of a 1 to 3-digit country code, area code (local and long-distance), and subscriber number, and a subaddress of up to 40 octets. 1 Caller ID is a layer 3 number within the network. Incoming aIJIsDN in a format guaranteed by the basic functions of
The digital terminal 11 is notified.

On the calling side of the ISDN digital telephone terminal 11 with the above configuration, press the button Kn to input the area code, local code, and subscriber number.
When the call is sent, the ISDN digital telephone terminal 11 on the receiving side is selected.

Since the caller number including the subaddress is transmitted to the called party as a caller number that can be recalled from the called party, the caller number can be displayed on the display 12 of the ISDN digital FFI terminal 11 on the called party.

When a plurality of ISDN digital telephone terminals 11 on the called side are connected to a network termination device DSU, the subaddress sent to the called side is connected to a plurality of ISDN digital telephone terminals 11 from the network termination device DSU. It will be sent to... ISDN digital telephone terminal 11...
・ is an IS that has received the sub-address and the sub-address assigned in advance matches the received sub-address.
Only the DN digital telephone terminal 11 is the receiving party.

In this case, the caller number (subscriber number) is displayed on the display 12.

If a plurality of ISDN digital telephone terminals 11 are provided on the calling side, the subaddress will be included in the caller number.

Although the ISDN digital telephone terminal 11 having the above configuration displays one caller number, it has drawbacks such as not having a function to store the caller number.

Additionally, telephones equipped with an answering machine function over normal analog lines have the disadvantage of having to listen to voice messages in real time, check the caller's number using a separately prepared number table, etc., and then dial.

[Purpose of the invention] The present invention has been made in view of the above-mentioned difficulties.

To provide an ISDN digital telephone terminal capable of easily re-calling a caller by using a caller number provided by a caller ID notification service carried out in a network as dial information for re-calling a caller from a called side.

[Means for Solving the Problems] In order to achieve the above object, the ISDN digital telephone terminal according to the present invention has a caller number storage that stores the caller number sent from the network to the called party to the ISDN digital telephone terminal. means, a caller number display means for displaying the caller number stored in the caller number storage means, and one of the caller numbers displayed by the caller number display means to re-call the caller. and a re-calling means.

[Embodiment] A preferred embodiment of the ISDN digital telephone terminal according to the present invention will be described in detail below with reference to FIG.

In Figure 1, TEn (n=8 for explanation)
is an ISDN digital telephone terminal (hereinafter simply referred to as terminal) on the receiving side. Terminals TE□ to TE are network terminal equipment D
Connected to SU□ by bus cable BUS. In addition, the network termination unit DSU connects ISDN (
Integrated ServiceDigital
network).

Terminals TE, ~TE, display 2, function key Sn (n = o is the answering key, n = 1 and 2 are cursor keys, n; 1 is the up side, n = 2 is the down side)
will be established. Note that, as in the conventional case, a transmitter/receiver 3 and a button Kn are provided.

The terminals TE□ to TE are provided with a RAM 4 for storing a caller's number, a CPU 5, and a telephone call circuit 8, as shown in the terminal TE of FIG. In addition, display 2 is connected to data bus 6.
The caller number stored in the RAM 4 is displayed under the control of the CPU 5 via the CPU 5.

The sender's number is sent and received via the interfaces 7a and 7b'.

RAM4 has 32 bits per word, 0 to 1, as shown in Figure 2.
023-word structure caller number table ○ GNT is provided 0 caller number table 0GNT has caller number memory OGM, ~OGMzss, which is 4-word structure, OGMn
The 0th to 20th bits of the Oth word of the incoming date ICD, 21
Bits to 29 bits are the display number DPN, 30.31 bits are the state number STN, and words 1 to 4 are the digit number DS.
0 to DS23.

The incoming call date ICD can display 1 hour on the 1st of the month.

The display number DPN indicates the order of display on the display 2.

The status number STN is "00" which is empty, roIJ is the answering mode and "10" is a disconnection before response, and rlIJ is a response.

Digit number DS, ~DS! 3, the area code, area code, local area code, subscriber number, and subaddress number are entered in order from the beginning.

When a call is received after the answering machine key S0 is operated.

Similar to a conventional answering machine, it notifies the caller that it is in answering machine mode and stores the message in a memory (not shown). At the same time, the incoming call date ICD, the digit numbers DS0 to DS0, "01" as the status number DTN, and the display number DPN are written in the empty caller number memories OGML to OGM□. The call came in when the answering machine key S0 was not operated, and the ringtone was 6~
If there is no response even after 10 calls, the state number STN becomes "10", but the same data as above is entered.0 When the call is answered, the state number becomes "11".

A recall program 10 shown in FIG. 3 is provided in the RAM 4 as a recall means for recalling the caller.

The recall program 10 determines that there is an incoming call in the box F1.
The flow then goes to process F2, and in process F, a power supply timer for supplying power to the display 2 is set. When the power supply timer is set, a cursor is displayed at the beginning of the display 2 in process F.

Caller number memory OGM, ~ OGM2. , when the caller number is entered in the display number DPN, the caller number, the date of incoming call, and whether the call is in answering mode or not, whether the call is disconnected before answering, or whether the call is an answered call are displayed in the order of display number DPN. The number of caller numbers that can be displayed each time is 5 to 6, and when the cursor key S2 is pressed, the cursor moves to the bottom column in sequence. When the cursor reaches the bottom row, the data is shifted one by one and the data that is not displayed one by one is displayed one by one. Cursor key S 82
When the desired caller number is specified with the cursor, the # button is pressed and the caller number specified with the cursor is called again in process F. If the # button is not pressed, make a decision in decision box F7 and go to process F again.

Return to hell. Cursor key S1. Judgment box F if the power timer times out without S.
, the execution of the recall program 10 is terminated.

[Operation of the invention] When the terminal 11 sends a message to the terminal TE via the network termination unit DSU, the layer 3 information consisting of the common part and the individual part is sent to the DS.
U, to ISDN.

As shown in Fig. 4, the individual part consists of 1, 1 and 8 bits.
2.3... Octet O (:T1.0CT2...
The message ro1101100J, which is the caller's number, is written in the OCT as an information element identifier. OCT, enter the length of the caller number to be filled in after the OCT, 0 caller number is (03)245-
In the case of 0537, since it is 9 digits of "032450537J", the length of the caller number content is "9". Note that the 8th bit "0" is a variable length, and "1" is a fixed length. Since the 0 caller number has a lot of information content, it is a variable length information content, so the 0
The 8th bit of CT1 is "0", and OCT, 9th bit thereafter.
The digit number is entered.

In ISDN, r032450537J is the unique identification number of the calling side, that is, it is verified that it does not include a subaddress number, and then sent to the terminal TE on the called side via the network termination unit DSU.

At the terminal TE1, the caller number r032450537J is written into the digit numbers DS0 to DS of the caller number memory OGM of the caller number table 0GNT shown in FIG.

Note that if the ISDN caller ID notification restriction service is implemented under a contract between the calling party and NTT, the caller number information is not sent.

r053 when the caller ID includes a subaddress
2450537J followed by a subaddress such as “000
2'' is sent from the ISDN to the terminal TE1 on the called side.

It is possible to transmit and receive information on the campus of 128 alphabetic characters in a calling signal between users via the D channel. In this case, the layer 3 information shown in FIG. 5 is formed by ISDN. In the OCT of this information element identifier, ro 1111110J is entered as a variable length information element identifier between users.

The user/user content length is entered in the OCT.

By using user-to-user information to encode, for example, "I want you to call me," simple information can be displayed at the same time as the caller number.

Furthermore, if an index table for indexing caller number versus name is provided, caller number and name can be displayed at the same time.

[Effect of the invention] As is clear from the above embodiments, the ISDN according to the present invention
The digital terminal includes a caller number storage means for storing the caller number sent from the network to the called party to the ISDN digital telephone terminal, and a caller number storage means for displaying the caller number stored in the caller number storage means. Since it is equipped with a display means and a recall means for selecting one of the caller numbers displayed by the caller number display means and recalling the caller, the caller can be identified by voice and the caller can be separately provided. This eliminates the need to index the caller's number using a memo or the like in which the caller's number has been written before calling the caller, and has the effect of easily calling the caller again.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an ISDN digital telephone terminal according to the present invention, FIG. 2 is a data configuration diagram of a caller number table related to FIG. 1, and FIG. 3 is a recall diagram related to FIG. 1. 4 and 5 are data configuration diagrams showing the ISDN information format, and FIG. 6 is a block diagram of a conventional ISDN digital telephone terminal. 0GNT・・・Caller number table (caller number storage means)

Claims (1)

[Claims] a caller number storage means for storing the caller number sent from the network to the called party to the ISDN digital telephone system terminal; a caller number display means for displaying the caller number stored in the caller number storage means; An ISDN digital telephone system terminal comprising a re-calling means for selecting one of the caller numbers displayed by the caller number display means and re-calling the calling party.