JPH01101769A - Incoming call transfer system - Google Patents

Abstract

PURPOSE:To attain the transfer of a call to an extension in busy without requesting recall to an incoming call by calling an extension telephone set being a transfer destination when the call of the caller on telephone set is finished, and connecting an incoming call awaited at the end of talking to the destination extension telephone set. CONSTITUTION:When an incoming call is going to be transferred to other extension and when the caller comes across the busy transfer destination extension, after the talking with an incoming call is restored by hooking, and after whether or not the caller awaits the end of talking is confirmed, hooking is applied again, the incoming call awaits the end of call of the transfer destination extension by dial of a talking end awaiting request code, then the instantaneous destination extension is called at a point of time of the talk of the transfer destination extension is finished. Thus, the incoming call is transferred even to a extension without requesting to the call back again to the incoming call.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for transferring an incoming call, and particularly to a method for transferring an incoming call when the extension telephone at the transfer destination (hereinafter referred to as the extension) is busy.

[Conventional technology]

Conventionally, this type of transfer method is such that when an incoming call is transferred by an attendant, if the destination extension is busy, the incoming call is waited for the call to be completed at the destination extension by operating a telephone key from the attendant. be.

[Problem that the invention seeks to solve]

The above-mentioned conventional method of transferring an incoming call to a busy extension using an attendant is only possible from the attendant, and in the method of transferring an incoming call using an extension, if the transfer destination extension is busy, If the incoming call cannot be transferred to another extension, notify the incoming call and try to transfer it to another extension, or
Otherwise, there was a drawback that the only option was to ask them to call back.

SUMMARY OF THE INVENTION An object of the present invention is to provide an incoming call transfer method that eliminates the above-mentioned problems.

[Means for solving problems]

The present invention relates to an automatic private branch exchange that can transfer an incoming call to another extension telephone by hooking the extension telephone that answered the incoming call or pressing a transfer telephone key and dialing the transfer destination extension number.

If the transfer destination phone extension is busy, the transfer destination phone extension waits for the incoming call to complete the call by operating the transfer source phone extension, and the transfer destination phone extension waits for the call to complete when the call ends (on/off).
This incoming call transfer method is characterized in that when the call is hooked), the transfer destination extension phone is called, and when the transfer destination extension phone answers, the incoming call that was waiting for the call to be completed is connected to the transfer destination extension phone.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

FIGS. 1 and 2 are block diagrams showing an embodiment of the transfer method according to the present invention. Further, FIG. 3 is an example of a configuration diagram of a busy transfer destination extension accommodating location information storage memory (BSM), and FIG. 4 is an example of a configuration diagram of a call completion waiting memory (CPM).

In Fig. 1, extension 5TA-A is line circuit LC-
A is connected to the incoming trunk ICT via the main switch 5III as shown in ■.

Here, when the line circuit LC-A detects the hooking of the extension STA-A or the pressing of the transfer telephone key, it notifies the central control unit CPU of the hooking detection through ().

Then, the central control unit CPU first controls the main switch S, releases the connection of (■), and then switches the line circuit LC-A
Connect to the transmission register ORT as shown in ■, and
A hold tone is sent to the incoming trunk ICT as shown in (3).

The outgoing register ORT, which received the dialed digits from extension STA-A, transmits the numeric information to the central control unit CPU by ■.
Send to. The central control unit CPU analyzes this numerical information and identifies that it is the extension number of extension STA-H, releases the connection between the line circuit LC-A and the outgoing register ORT, and restores the outgoing register ORT.
Check the status of extension 5TA-B. At this time, the first
As shown in the figure, when extension STA-B is talking to extension 5TA-C via intra-office trunk IOT, central controller CPυ
First, store the storage location information of extension 5TA-B in the area corresponding to the storage location information of gSTA-A in the storage memory BSM as shown in FIG. Sends a busy tone to A.

Then, when extension STA-A, which is listening to the busy tone, hooks, the line circuit LC-A notifies the central control unit CPU of the hooking information by ■.The central control unit CPU then holds the incoming trunk ICT of ■. The voice and the busy tone for extension STA-A in (2) are stopped, the main switch Sv is controlled, and the extension STA-A and the incoming trunk ICT are connected again as in (3).

Here, when the line circuit LC-A detects the hooking of extension STA-A again, the line circuit LC-A notifies the hooking information to the central control bag [CPU by Sends hold music to the incoming trunk ICT and connects extension STA-A and outgoing register ORT, and outgoing register ORT connects extension 5TA.
- Send the dialed digit information from A to the central controller cpυ. As a result of the dial digit analysis, the central control unit CPU identifies it as the call completion waiting request code, and after restoring the outgoing call register ORT, reads out the accommodation location information of the busy extension STA-B from the storage memory BSM by 4 As shown in Figure 4, the area corresponding to the storage location information of extension STA-8 of memory CPH has one incoming trunk ICT,
In addition, in the area corresponding to the accommodation location information of the incoming trunk ICT, there is an extension S where the incoming trunk ICT is waiting for the call to complete.
Storage position information of TA-B is stored (Fig. 1 ■). Then, a setting completion tone is sent to the extension STA-A as shown in (■). As a result, even if extension 5TA-A is restored, the incoming trunk ICT will wait while listening to the hold tone for extension 5TA-8 to complete the call.

When the line circuit LC-8 detects that extension STA-B is on-hook in this state, it notifies the central control unit CPU of the on-hook information through (2). central control unit cpu
are extensions 5TA-B, 5TA-C and intra-office trunk 10
It performs recovery processing on the TtC and checks the memory CPM to determine whether there are any subscribers waiting for call completion. In this case, the accommodating position information of the incoming trunk ICT waiting for the completion of the call to extension STA-B is read out ((2) in FIG. 2). The central control unit cpu controls the line circuit LC-B based on this information and connects the extension 5TA-
B starts ringing, while the incoming trunk ICT
Change the hold tone for the message to a ring tone (Fig. 2 ■).

When extension STA-B goes off-hook, the central controller cpu controls the main switch Sv, connects extension 5TA-B and incoming trunk ICT as shown in (3), and connects extension STA-B with ringing and incoming trunk ICT. stop ringing. As a result, the extension 5TA-8 and the incoming trunk ICT are placed in a conversation state.

On the other hand, the incoming trunk I is waiting in the call completion waiting state.
When CT recovery is detected, the central control unit cpu reads the storage location information of extension STA-B registered in the area corresponding to the storage location information of the incoming trunk ICT of the memory CPM and clears the area corresponding to the 1-car storage location information. do.

Further, by providing a timer for monitoring the call completion waiting time and calling back the extension STA-A when the timer expires, a long waiting time can be avoided. However, in this case, the extension number 5TA-, which is the setter, is stored in the memory CPH.
The accommodation location information of A also needs to be stored in the area corresponding to the accommodation location information of the incoming trunk ICT.

Although the transfer of incoming calls from trunks has been described here, the same applies to incoming calls from extensions.

〔Effect of the invention〕

As explained above, the present invention attempts to transfer an incoming call to another extension, and when the transfer destination extension is busy, it returns to the incoming call by hooking, and after confirming whether to wait until the call is completed, By hooking again and dialing the call completion request code, the incoming call will wait for the call completion of the forwarding destination extension, and then, when the call on the forwarding destination extension is completed, the incoming call will be immediately called by calling the forwarding destination extension. This has the effect that an incoming call can be transferred to a busy extension without having to request the caller to call again.

[Brief explanation of the drawing]

1 and 2 are block diagrams showing an embodiment of the transfer method of the present invention, FIG. 3 is a block diagram showing a memory for storing location information of a busy transfer destination extension, and FIG. 4 is a call completion waiting memory. FIG. SW...Main switch CPU...Central control unit 5TA-A, B, C...Extension telephone LC-A, B
, C...Line circuit ICT...Incoming trunk
ORT: Outgoing call register IOT: In-office trunk BSM: Busy transfer destination extension accommodation location information storage memory CPM: Call completion waiting memory

Claims (1)

[Claims] (1) In an automatic private branch exchange that can transfer an incoming call to another extension telephone by hooking the extension telephone that answered the incoming call or pressing the transfer telephone key and dialing the transfer destination extension number, If the extension phone is busy, the incoming call will wait for the transfer destination extension phone to complete the call by operation from the transfer source extension phone, and when the transfer destination extension phone finishes the call (on-hook), the transfer destination extension phone will call An incoming call forwarding method characterized in that when a call is called and the forwarding destination extension telephone answers, the incoming call that has been waiting for the completion of the call is connected to the forwarding destination extension telephone.