JPH0548680A - Isdn telephone set - Google Patents

Abstract

(57) [Abstract] [Purpose] On an ISDN telephone, confirm whether or not the desired callee at the called party is present without calling. [Structure] Each of a plurality of handler names and presence / absence information is registered in the storage circuits 43 and 44, and when making a call, the inquiry request sending circuits 45 and 55 send inquiry request information to a called party through a control channel, This information is detected by the inquiry request detection circuits 46 and 56, the storage circuits 43 and 53 are collated, and this response information is sent to the caller through the control channel. The presence or absence of is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN telephone connected to an ISDN line and transmitting / receiving via an information channel and a control channel.

[0002]

2. Description of the Related Art Generally, one telephone has a plurality of telephone operators, and when he / she wants to talk with any one of these telephone operators, he / she makes a call to the telephone and the called party answers. After that, I had no choice but to appoint the desired handler.

[0003]

However, even if the called party answers, if the desired operator is absent, there is a drawback that the time and effort for confirmation by the telephone call become invalid. Therefore, an object of the present invention is to provide an ISDN telephone capable of knowing whether or not a desired callee at a called party is present without confirming the call.

[0004]

In order to achieve the above object, the present invention provides a storage circuit for registering a plurality of telephone operator names and presence / absence information of each telephone operator in the above ISDN telephone. , The inquiry request sending circuit, which sends inquiry request information to the called party via the control channel to inquire whether each called telephone operator is present or absent, and the inquiry request information is detected and the storage circuit is checked. The inquiry request detection circuit that determines the presence or absence of each telephone operator and sends the response information indicating this presence or absence to the caller through the control channel, and the presence or absence of each telephone operator according to the response information. And a display device for displaying the absence.

[0005]

Therefore, by designating the call destination and performing the call operation, it is displayed whether or not each telephone operator at the call destination is present. When the desired operator is absent, a call is made. You can omit the confirmation by.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the block diagram of FIG. In the figure, an ISDN exchange (hereinafter, EX) 1 and an ISDN line (hereinafter, line) 2
ISDN telephones (hereinafter, TE
L) 4 and 5 are provided, which are basic interface circuits (hereinafter, IF) 41 and 51, telephone circuits (hereinafter, T).
C) 42, 52, and a memory circuit (hereinafter, M)
M) 43, 53, display devices (hereinafter, DP) 44, 54,
Inquiry request transmission circuits (hereinafter, IRS) 45, 55 and inquiry request detection circuits (hereinafter, IRD) 46, 56 are provided.

Here, the IFs 41 and 51 disassemble and assemble the two information channels and one control channel via the lines 2 and 3, respectively, transmit / receive various control information using the control channel, and Send and receive call information to be used, and TC4
2, 52 allows call operation, incoming call notification and telephone call.

On the other hand, the MMs 43, 53 have TCs 42, 5
A plurality of operator names using TEL 4 and 5 and presence / absence information of each operator are registered by key operation 2 or the like. For example, call operation is performed with TEL 4 to TEL 5 as a callee. When you do, IRS45 responds and TE
Inquiry request information for inquiring whether each L5 operator is present or absent is sent to TEL5 by the control channel as a user-user information element of the call setup message.

Then, this is given to the TEL 5 via the lines 2 and 3 and the EX 1, the IRD 56 detects the inquiry request information, refers to the MM 53 and judges the presence or absence of each operator, and a response indicating this. The information is sent to TEL4 via the control channel as user-user information in the call setup message.

This information is transmitted to the TE by the same route as described above.
DP44 is given to L4 and TEL is set according to the response information.
5 side Displays the name of each operator and the presence or absence of each operator.

Therefore, the operator who has performed the call operation of TEL4 can immediately know whether or not the desired operator on the TEL5 side is seated by the display of DP44. Therefore, when the operator is absent, the call operation is performed. By terminating the call, the call is disconnected before the call connection by EX1, unnecessary calls can be omitted, and call charges can be saved.

[0012]

As is apparent from the above description, according to the present invention, a storage circuit for registering a plurality of telephone operator names and their presence / absence information is provided, and inquiry request information is sent to the called party. It is sent out via the control channel, detected at the called party, collated the memory circuit, and sent out response information indicating the presence or absence of the operator to the caller through the control channel, and the caller follows the response information. By displaying the presence or absence of each operator, the presence or absence of the desired operator is clarified before the call is set, and the time and effort required for confirmation by an invalid call are omitted. Is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 2,3 ISDN line 4,5 ISDN telephone 41,51 Basic interface 43,53 Storage circuit 44,54 Display device 45,55 Inquiry request sending circuit 46,56 Inquiry request detection circuit

Claims (1)

[Claims] 1. An ISDN telephone having a transmission / reception function via an ISDN information channel and control channel, a storage circuit for registering a plurality of telephone operator names and presence / absence information of each of these telephone operators, and a called party. The inquiry request sending circuit for sending inquiry request information for inquiring that each of the telephone operators is present or absent to the called party through the control channel, and the inquiry request information is detected and the storage circuit is collated. An inquiry request detection circuit that determines the presence or absence of each of the telephone operators and sends response information indicating the presence or absence of the telephone operator to the caller through the control channel, and the telephone operators according to the response information. An ISDN telephone provided with a display device for displaying the presence or absence of the person.