JPS61125269A - Call transfer system of private branch exchange - Google Patents

Abstract

PURPOSE:To permit the transfer of the incoming call to other telephone set corresponding to the number dialed by causing a register of the telephone set which is receiving a ringing tone to count the number dialed and analyzing it by a central processing unit. CONSTITUTION:When the telephone number of a telephone set 12 is dialed from a telephone set 11, the number dialed is counted by a register 20. The register 20 sends the numeric information of the telephone number counted to a CPU22, and the CPU22 analyzes this numeric information. When it is identified that this numeric information is the telephone number of the telephone set 12, the CPU22 stops sending of the ringing tone to the telephone set 11 and causes the telephone set 12 to send the ringing tone. When the telephone set 12 is off-hooked, the telephone sets 10 and 12 are connected, it is possible to make a call between the two sets.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a call transfer method for a private branch exchange, and particularly to a call transfer method for an electronic private branch exchange that transfers information between a telephone and a subscriber circuit using a digital signal method. Regarding the transfer method.

(Prior Art) Conventionally, a private branch exchange system has a disadvantage in that when there is a telephone @KM call, the incoming call cannot be transferred to another party until it has been answered.

(Objective) The object of the present invention is to eliminate the above-mentioned drawbacks, namely, to receive and count the digits dialed by a telephone receiving a ringing tone by a register, analyze it by a central control unit, and receive a call to a telephone. The PC provides a call forwarding method for private branch exchanges that forwards calls to other telephones corresponding to the dialed digits.

(Structure) A feature of the present invention that achieves the above object is that, in a transfer method of a private branch exchange device, when a call is being placed on a telephone, a means for receiving a selection signal generated by an operation of the telephone that is receiving a call is provided. The purpose of this telephone is to transfer a call incoming to this telephone to another telephone specified by the selection signal.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

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

In FIG. 1, 10, 11, and 12 are telephones that transfer information between the telephone and the subscriber circuit using a 4-wire digital signal system, and are housed in a 5% branch type private branch exchange;
0 is a register for receiving dialed digits, 21 is an exchange switch of a private branch exchange, and 22Fi is a central control unit.

Next, the operation of this embodiment will be explained. In FIG. 1, when a call is being made from telephone 10 to telephone 11 (
That is, when the telephone 11 is receiving a call) the central control device 2
By connecting the register 20 to the incoming telephone 11 under the control of 2, the register 20 connects the incoming telephone 11 to the incoming telephone 11 (because the telephone of this private branch exchange and the subscriber circuit are connected by a 4-wire system). Digits dialed from (
That is, the dialed telephone number is counted by the register 20 when it is dialed (this state is referred to as state -1). The register 20 sends the numerical information of the counted telephone number to the central controller 22.
2 analyzes the numerical information of this dialed telephone number. As a result, when this numeric information is identified as the telephone number of telephone 12, central controller 22 stops sending a ring tone to telephone 11 and operates to send a ring tone to telephone 12. Next, when telephone 12 goes off-hook, telephone 1
0 and telephone 12 are connected, and it becomes possible to make a call between these telephones.

In addition, in the above state-1, if the telephone 11 is off-hook without any dialing being made on the telephone 11, and the telephones 10 and 11 are connected under the control of the central control unit 22, these telephones Used as a conventional telephone.

(Effects) As explained above, the present invention allows the incoming call to be transferred to the telephone of the dialed telephone number by dialing the telephone number of the telephone to which the incoming call is to be forwarded from the incoming telephone. This has the effect of making it possible.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the invention. 10.11.12...Telephone, 20...
・Resistor, 21... Exchange switch, 22...
...Central control unit, RGT...Ring tone sending device. Figure 1

Claims (1)

[Claims] In the call transfer method of electronic private branch exchange equipment, which transfers information between the telephone and the subscriber's circuit using a digital signal method, when a call is incoming to the telephone, a selection signal generated by the operation of the telephone during the incoming call is sent to the telephone. 1. A call transfer method for a private branch exchange device, characterized in that the private branch exchange device is provided with receiving means, and a call being received at this telephone is transferred to another telephone designated by the selection signal.