JPS60163559A - Incoming transfer system - Google Patents

Abstract

PURPOSE:To receive surely by transferring an incoming call to a representative group or a specific telephone set other than a tenant if a called extension subscriber of the representative group or the tenant does not respond to the incoming call. CONSTITUTION:When an incoming from a trunk line 6 is given to a representative group or a tenant A, a central unit CC4 detects it via an incoming trunk line trunk 5, controls a main switch 3, which is changed over and the trunk 5 is connected to an extension telephone set 1a via a subscriber circuit 2a. If the extension subscriber does not respond to bell ringing for a prescribed time by the telephone set 1a, the CC4 calls the rest extension telephone sets 1b...1n of the group or the tenant A one after another. If the said subscribers do not respond, the CC4 controls the main switch 3 so as to connect the trunk 5 to a specific telephone set 1z via a subscriber circuit 2z.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a call transfer system for automatic private branch exchange equipment.

[Background technology]

In the conventional distributed relay stand system of automatic private branch exchange equipment, incoming calls on the central office line are indicated by the same number of visual and audible display devices as there are central office lines. In addition, by adopting the individual call reception system, it became possible to audibly display the incoming call using an audible bell on each side of the telephone.

If a call is received by a specific station line to a specific outside group or specific tenant, and the subscriber does not answer the audible bells, the call will not be received and the caller will have to turn the telephone again. There is a drawback that the operability and serviceability of the telephone deteriorates because dialing requires making a call to the specified representative group or fixed tenant.

[Object of the invention].

The present invention has been proposed and devised in view of the above points, and is an automatic private branch exchange system using an individual call reception method that connects the call directly to a predetermined extension when a call is received on the trunk of the receiving office line. 7 When there is a central office line voice call, the called extension subscriber in the representative group or tenant does not respond to it! S'j! In this case, the purpose is to improve telephone service by connecting calls from central line callers to specified extension lines other than the representative group or the tenant.

[Structure of the invention]

The present invention is based on an automatic private branch exchange system that connects the call directly to a predetermined extension when an incoming call is received on a terminating office line trunk, in which the called extension is organized into a representative group or tenant, When the representative Daruso or the called extension subscriber of the tenant does not respond to an incoming call,
The incoming call is transferred to a specific telephone outside the representative group or outside the tenant.

〔Example〕

FIG. 1 is a block diagram for explaining the incoming call transfer method according to the present invention.In FIG. 6, 1a, 1bl...
, 1n is the extension telephone belonging to the representative group of 1':) or tenant A, 21*2k)e..., 2n
1g is the subscriber circuit connected to each of them, and 1g is a specific telephone t2 other than the representative group or the tenant group.
z is the subscriber circuit connected to it, 6 is the main switch, 4
5 is the central control unit (C, C), and 5 is the terminating station line trunk (C
ICT) and 6 are office lines, and their connection relationship is as shown in the figure.

When the invention from the office line 6 is in the representative group or the tenant, the central control unit 4 detects this via the terminating office line trunk 5 and controls the main switch 6 to switch the terminating office line trunk 5 to the subscriber. Extension telephone 1a via circuit 2a
Connect K. At this time, the audible bell on the extension telephone 1a rings and the corresponding extension subscriber is called, but if the corresponding extension subscriber does not respond within a predetermined time, the central control device 4 will call the second group or tenancy)A. The remaining telephone extension 1b
, . . . , select the empty extension telephones in In one after another, and select the aforementioned extension 1tIIi! The corresponding subscribers are called one after another in the same manner as in the case of i-machine 13. However, if all of the called subscribers do not respond, the central control device 4 determines that all of the called subscribers of extension telephones 1as1b, . It is determined that there is a response, and thereafter, the live switch 6 is controlled and switched, and the terminating office line trunk 5 is connected to the specific telephone IK via the subscriber circuit 2z. At this time, the specified telephone 1z
The audible bell rings and the specific subscriber is called, and when the specific subscriber responds, the incoming call from the central office line 6 to the representative group or tenant is always received.

〔Effect of the invention〕

As explained above, the present invention has the effect that when an incoming call is received from the first line and the called extension subscriber does not respond by using an individual call receiving system, the call can be transferred to a specific telephone set to ensure that the call is received.

[Brief explanation of the drawing]

FIG. 1 is a block diagram for explaining a call transfer method according to the present invention. 1at1bt...In is an extension phone, 2a
I 2b *..., 2n is subscriber circuit, lti
22 is a subscriber circuit, 6 is a master switch, 4 is a central control unit, 5 is a terminating office line trunk, and 6 is an office line. Figure 1

Claims (1)

[Claims] When an incoming call is received on a terminating office line trunk, in an automatic private branch exchange (individual terminating system) that directly connects the incoming call to a predetermined extension, the called extension is grouped into a representative group or tenant, and the called extension is grouped into a representative group or tenant. An incoming call transfer system characterized in that when a called line subscriber of the tenant does not respond to an incoming call, the incoming call is transferred to the representative group or a specific telephone other than the tenant.