JPS62202644A - Secretary talking interruption system to manager telephone set - Google Patents

Abstract

PURPOSE:To offer the service function which is economical and whose work performance is improved by applying interruption talking from a secretary to a manager telephone set without the provision of a separate talking line or an interphone. CONSTITUTION:When a next trunk line incoming call exists to a manager, a secretary applies reception processing to the incoming call to keep the incoming call holding state. A secretary telephone set subscriber LC 11 accommodated with a secretary telephone set TEL 11 and a manager telephone set subscriber LC 10 are connected by a reception path P 12. A voice message from the secretary through the reception path P 12 is added analogically to the reception path 11 from a trunk line trunk TRK 10 being busy by a reception path adder circuit ADD of the circuit LC 10 and the result is sent to the manager telephone set TEL 10. Thus, the service function with improved working performance and economy is offered.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for establishing a service function in a private branch exchange, and more particularly to a method for connecting a telephone line between an executive telephone and a secretary telephone connected to a digital private branch exchange.

BACKGROUND OF THE INVENTION What is required of the secretary call interrupt function for executive telephones according to the present invention is 1. For example, when a next layer call is received to an executive who is currently on the phone, the secretary must accept the incoming call and then As a means of notifying the executive that a call has arrived, only the call path from the secretary to the executive is connected without allowing the other party the executive is already talking to to hear the secretary's voice. Conventionally, as a call path from a secretary to an executive, a method has often been adopted in which the executive is called over a speaker by using a different call path from the one already used by the executive. Also, intercoms may be installed separately.

Figure 4 shows the former relay method in the conventional system, in which the executive telephone stack J is connected to the sending path Px and the receiving path P21.
This indicates that a call is in progress via the trunk line trunk TRK x and the subscriber circuit LC for executive telephones connected to the office line trunk TRK x. Now, in Haru, who has received the next level of trust to the executives,
Secretary call interruption J/, for example, temporarily puts the incoming call on hold. Thereafter, by setting the reception path Pn from the secret telephone subscriber circuit LC-co to the executive telephone speaker subscriber circuit LC2/, the secretary's message is transmitted from the speaker in the executive telephone stack 20. ing.

Problems to be Solved by the Invention However, according to the above-mentioned conventional system, a separate communication path is required for secretarial calls, so - one communication path must be used for executive telephones. There is. This drawback not only worsens the economical cost of cables when installing a new switchboard, but also worsens the ease of construction when relocating executive telephones. Father, even if you consider the conventional example of using an intercom, it is not economical.

The present invention has been made in view of the above-mentioned conventional circumstances, and
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a standard four-talk secretary interrupt system for executive telephones, which makes it possible to eliminate the above-mentioned drawbacks inherent in the prior art.

Means for Solving the Problems In order to achieve the above object, the method for interrupting secret calls to executive telephones according to the present invention is such that a private branch exchange system that accommodates executive telephones and secretarial telephones is configured to interrupt the central line and tI line. It is constructed with a subscriber circuit for executive telephones including a conversion circuit, a %PCM codec, a PCM decoder, an interrupt volume adjuster, and a receiving path adder circuit, thus establishing a service function.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a relay system diagram showing one embodiment of the present invention. Executive telephone equipment / (7 is subscriber circuit LCto for executive telephone equipment
The communication route with the central office line is connected to the station line.

The subscriber circuit LCto for the executive telephone set and the transmission path Pr.

and central office line trunk TRK1 connected by receiving path P//
It is formed through 0.

Here, when a request is made from the secretary to send a message to the executive who is on the phone, for example, there is a next call to the executive, the secretary accepts the incoming call and puts the incoming call on hold. In this case, a receiving path P/U is used to connect the secretary telephone subscriber circuit LC//, which accommodates the secret telephone TgL //, and the executive telephone subscriber circuit LG)o. The voice message from the secretary via the receiving path P/2 is sent to the receiving path adding circuit ADD of the executive telephone subscriber circuit LCto, where it is sent to the already-busy office line trunk TRK.
It is added in analog form to the reception path Pl/ from tO and transmitted to the executive telephone device 10.

FIG. 2 shows the internal configuration of the executive telephone subscriber circuit TAto. At the interface with the telephone, the telephone control unit BR3 handles communication current supply, ringing signal transmission, and monitoring functions.
Built-in. The line-to-line conversion circuit for the communication path consists of a transformer T, a balanced impedance BN, and a terminal impedance Z.
In the reference line system, the transmitting and receiving lines are connected to the PCM codec GODEC. PCM codec C0DKG
, the transmitting signal is AD converted and sent to the transmitting digital signal path E3o.

The reception signal is DA-converted from the reception digital signal path Ro and is transmitted to the single line/dashed line conversion circuit.

On the other hand, information on a reception digital signal path Rt, which is different from the above, is DA-converted and input to the reception path addition circuit ADD via a PCM decoder C. Here, in the - line/da line conversion circuit, 't!' which includes the subscriber line. It is designed to optimize the amount of mismatch attenuation by matching the impedance of the first talker side with the balanced impedance BN and the termination impedance Zn.

Generally, it is technically easy to obtain a mismatch attenuation amount of 2o68 or more. However, even if an optimal mismatch attenuation is taken, the voice (interrupt voice) from the reception digital signal path R/ is reflected to the transmission path, and therefore leaks slightly to the central office trunk side. Therefore, the signal level is attenuated in advance by the interrupt volume controller GO,
The leakage to the central office trunk side is virtually inaudible.

By the way, the attenuation amount of the interrupt volume adjuster GO is /s aB
If the volume is set to a certain level, it is possible to set the volume to a level that is sufficiently audible to the telephone side, but to a volume that cannot be heard by the central office line trunk side.

FIG. 3 shows an example of an executive telephone, and the telephone is equipped with a communication path Lo-L4C and hold buttons HL and D. The telephone call circuit Lo-LII can be associated with a central office line trunk to have a function of receiving calls and capturing outgoing calls, and can also be provided with a function of calling an extension button (for example, calling a secretary).
These functions can be freely configured by the main side ω of the private branch exchange (for example, a call processing program). Suppose now that an executive is on call circuit LO and is talking to a central office line, and an incoming call from another office line is received by a secretary and held on call circuit L. The secretary performs an interrupt process for the executive, and, for example, following the interrupt display tone, informs the telephone line L/ that the office line is on hold. Here, the executive can temporarily put the line currently in use on hold by pressing the hold button HLD and respond to the central office line of the call circuit L/.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, it is possible to make an interruption call from a secretary to an executive telephone without installing a separate call line or intercom, which is economical and easy to construct. This has the effect of making it possible to provide improved in-flight service.

[Brief explanation of drawings]

FIG. 1 is a relay system diagram showing a practical example of the present invention. A configuration diagram showing an example of a subscriber circuit for a filling machine, Part 3
The figure is a front view of an example of an executive telephone, and the second figure is a diagram of a conventional relay system. TKL iO, L 20... Executive telephone, LClo
, LGx>...Subscriber circuit for executive telephone, LC2/...
・・Installation of Toguchi human circuit for executive telephone speaker //
, Place/...Secret #telephone, Plo, Pso...Send call path, P//, P/ko, P2/. P 22-...Reception path, TRK tO, TRK X)
- Office line trunk, ADD...receiving path addition circuit, T
...Transformer, BH3...Telephone control section, BN.
...Balanced impedance, Zn...Terminal impedance, C0DEC...PCM codec, DEC...
・PCM decoder, (, C... Interrupt volume adjuster, S
. ...Transmission digital signal path, RO, Rt...Reception digital signal path, Lo -1, Da...Speech circuit, H
LD... Hold button Applicant Nippon Muronu Co., Ltd. Agent Patent attorney Yutabe Kumagai Figure 1 Installment book volume 1 round punishment (- Figure 2 Figure 3

Claims (1)

[Claims] A digital private branch exchange for accommodating executive telephones and secretary telephones, which includes a 2-wire 4-wire switching circuit, a PCM codec, a PCM decoder, an interrupt volume adjuster, and a receiving path addition circuit. A system for interrupting a secretary's call to an executive telephone, characterized by having the following features: