JPH0335861B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for starting and stopping telephone services in which a service subscriber can arbitrarily start and stop the service in various telephone services provided by a telephone exchange to subscribers, regardless of whether there is a call or no call. It is related to.

Among various telephone services, it is convenient for many to be able to start or stop the service by entering a call. For example, in the case of a call waiting service, it may be desirable to temporarily prohibit the service during a call with an important subscriber to prevent the call from being interrupted by an incoming call from a third party. Particularly, when a call in progress is an incoming call, this requirement arises because it is not until the call begins that the person on the other end and the content of the call are known. Furthermore, in the case of a recording service for recording the contents of a call, if the call is an incoming call, it may become clear that connection to a recorder is necessary only after the call begins.

As described above, various conventional telephone services have not been provided with a service function for starting and stopping the service during a call. In addition, the call waiting service has the disadvantage that it cannot help but affect telephone calls because it uses hooking or dialing a certain number as a control signal. Hereinafter, with reference to FIG. 1, the case of starting and stopping a call waiting service by a conventional telephone exchange will be explained in more detail.

In FIG. 1, SUBA is a call waiting subscriber, CWSWU is a call waiting subscriber switch unit accommodating the call waiting subscriber SUBA, CWSE is equipment for call waiting service, LINK is a main link,
SUBB and SUBC are subscribers, IOT is a known internal trunk, M is a known marker, and NG is a known number group.

Conventionally, call waiting service is started as follows. In other words, by applying for subscription to the service at a telephone office, a subscriber who desires a call waiting service can change the jumper from being treated as a single subscriber to representing two lines in the number group NG shown in the figure, and Call waiting service subscribers
This is done by connecting the call waiting subscriber switch unit CWSWU during the SUBA main link LINK accommodation. Conversely, the suspension of the service can be done by having the subscriber who wishes to suspend the service apply to the telephone office for suspension, changing the jumper representing the second line of Number Group NG to being treated as a single subscriber, and further , by disconnecting the call waiting service subscriber switch unit CWSWU. All operations for starting and stopping these call waiting services are performed manually by the central office. Therefore, once the call waiting service has been started, it is not possible for the service subscriber SUBA to reject incoming call waiting calls, for example during an urgent or important call with the subscriber SUBB. In this case, when a call is received from subscriber SUBC, it becomes a call-waiting call and the call-waiting subscriber receives a call.
An incoming call display tone is sent to SUBA. Therefore, call waiting subscriber SUBA is subscriber SUBB.
I told the subscriber that I had received a call waiting call, and after understanding the call, I performed the footing operation, and the subscriber C.
After explaining that an emergency or important call is in progress, the subscriber performs the switching operation again.
I had to go back to the call with SUBB.

In contrast, call waiting subscribers
In order for SUBA to continue talking with subscriber SUBB, there is a method of not performing a hooking operation, that is, not responding to subscriber SUBC's incoming call waiting calls, but this method does not allow SUBA to periodically call subscriber SUBA. The incoming call display tone is transmitted, which disturbs the call, and the subscriber SUBC has the disadvantage that the subscriber SUBC is mistakenly mistaken as not at home because the subscriber's known ring tone is continuously transmitted.

The present invention was made to eliminate these drawbacks, and it provides a means for transmitting and receiving out-of-band frequency signals between the service subscriber and the station equipment, and allows the subscriber to operate the terminal to make a call even during a call. To provide a telephone service start/stop method that transmits the control signal for the service to the station equipment without affecting the telephone line, in other words at a frequency outside the audible band, and enables the start and stop of the service to be controlled arbitrarily. This will be explained in detail below with reference to FIG. 2.

FIG. 2 shows one embodiment of the present invention.
is the call waiting subscriber, KU is the subscriber
OBIS is a key unit installed on the SUBA side that operates the start and stop of services.
OBIC, an out-of-band signal interface subscriber side device that generates an out-of-band signal to start or stop the service according to the operation of the KU, and sends the signal to the subscriber line.
is an out-of-band signal interface station side device that receives out-of-band signals sent to the subscriber line, SCH
CC is an out-of-band signal conversion unit that converts the out-of-band signal to an electronic level; CC is a common control unit that has a signal content identification function and a subscriber identification function, and controls a number group user memory control unit to be described later;
NGUSMC is a number group user memory control unit that controls electromagnetic level memory for starting and stopping services for service subscribers, which will be described later.
is a number group user memory which is a memory for starting and stopping services at an electromagnetic level, and CWSE is known call waiting service equipment consisting of a call waiting link CWL, a call waiting link controller CWL CONT, a call waiting device CWE, etc. be. Please note that the call waiting subscriber switch unit
CWSWU, number group NG, marker M, main link LINK, and subscribers SUBB and SUBC are the same as in FIG.

First, with reference to the figure, a case will be described in which a call waiting service is started. Call waiting service subscriber SUBA receives a service start key (not shown) using key unit KU.
operate. As a result, the out-of-band signal interface subscriber side device OBIS sends a call waiting service start signal (hereinafter referred to as CWST signal) using an out-of-band frequency to the subscriber line. this
The CWST signal is received by the out-of-band signal interface station side device, and converted into an electronic level CWST signal in the out-of-band signal converter SCH. The common control unit CC receives the electronic level CWST signal, identifies it as a CWST signal, and
It identifies the subscriber sending the CWST signal and controls the number group user memory control unit NGUSMC. The number group user memory control unit NGUSMC is a memory for starting and stopping the electronic level of the call waiting service provided for call waiting service subscribers, and has a conversion function of the electronic level and electromagnetic level, and is connected to the common control unit CC. In response to the instruction to start the call waiting service of the service subscriber SUBA, the memory corresponding to the service subscriber SUBA is set to the start state, and the number group user memory NGUSM is controlled. The number group user memory NGUSM is an electromagnetic level start/stop memory of a call waiting service provided for call waiting subscribers,
Call waiting service subscriber SUBA from number group user memory control unit NGUSMC
When an instruction to start the service is received, both of the known representative test lines corresponding to the service subscriber SUBA in number group NG are made vacant, that is, the T1 terminal and T2 terminal shown in the figure are made vacant. . The above operations realize the start of the call waiting service for the subscriber.

Next, suspension of the call waiting service will be explained. The call waiting service subscriber SUBA operates a service stop key (not shown) on the key unit KU. As a result, the out-of-band signal interface subscriber side device sends a call waiting stop signal (hereinafter referred to as CWSP signal) using an out-of-band frequency to the subscriber line. The CWSP signal is received by the out-of-band signal interface station side device OBIC, and is sent to the out-of-band signal converter.
It is converted to an electronic level CWSP signal at the SCH. The common control unit CC receives the electronic level CWSP signal, identifies it as a CWSP signal, identifies the subscriber sending the CWSP signal, and controls the number group user memory control unit NGUSMC.
The corresponding number group user memory control unit NGUSMC
puts the memory corresponding to the service subscriber, which has been in the start state, into a stop state, and controls the number group user memory NGUSM. The number group memory NGUSM stops the electromagnetic level start/stop memory. i.e. number group
A known representative test line compatible with service subscriber SUBA in NG is placed in a busy state.At that time, if the service subscriber SUBA is in a non-call state, the T2 terminal is set in a busy state, and even if it is in a call state. Otherwise, the other terminals that are not being used for a call are placed in a busy state. Through the above-described operations, the service to the call waiting service subscriber is stopped. Note that the call waiting service start signal CWST and stop signal CWSP using the above-mentioned out-of-band frequency may be a single frequency signal, a frequency shift signal/FS signal, a phase shift signal/PS signal, or a multifrequency signal/MF. Signal available. In other words, no matter which signal is used as a control signal, since it uses an out-of-band frequency signal, there will be no adverse effect if these control signals are sent during a normal call, when transmitting/receiving signals using audio frequencies, or when there is no call. It is something that cannot be given.

In addition, after the start of the above-mentioned call waiting service, call waiting service subscribers
Subscriber SUBC during a call between SUBA and subscriber SUBB
As a means for switching from subscriber SUBB to subscriber SUBC when a call is received from subscriber SUBA from subscriber SUBA, key unit KU is provided with a switching key (not shown), and a call waiting device is also installed.
By providing the CWE with an out-of-band frequency switching signal conversion means and detection means, the call waiting device can respond to the switching key of the key unit KU.
CWE's switch channel can be activated and call waiting services can be performed without affecting calls.

As described above, in the embodiment of the present invention, a call waiting service subscriber can arbitrarily start and stop the call waiting service during a call or even when there is no call.

Therefore, in the case of an important outgoing call that you do not want to receive call waiting while you are talking, there is an advantage that you can stop the call before making the outgoing call. In addition, in the case of an incoming call, there is an advantage that if you do not want to be disturbed by the incoming call depending on the other party or the content of the call, you can stop the call without preventing damage during the call.

Furthermore, since the embodiment of the present invention controls the service memory without driving the main link of the exchange, there is no need to drive the main link of the exchange, and there is no need to use connection codes such as special numbers for controlling the exchange. There are advantages.

In the embodiment of the present invention, the service start/stop receiving means is provided on the subscriber line side, but the effects of the present invention can also be effectively achieved even if it is provided on the trunk side via a known main link.

The present invention has the advantage of being able to control the service memory during a call without affecting the call, so it can be used to control the start and stop of recording during a call during a call recording service implemented on the exchange side. can.

In the case of malicious call detection, during a call, when a malicious call is determined to be a malicious call, information on the malicious call can be input into the exchange without the caller noticing, and the exchange sends an alarm, puts the line on hold, and detects the caller. It becomes possible to control the following.

The service start/stop signal is an out-of-band signal,
In addition, since a reception identification means for service start/stop signals is placed before the main link, it is possible to receive calls from other terminals even when the terminal sends/receives service start/stop signals while the terminal is idle. have an effect.

Embodiments of the present invention have the advantage of being able to control the service memory without driving the main link of the exchange and without using a special number, which is a connection code for controlling the exchange, so that more control functions can be used in special telephone services that will appear in the future. It becomes possible to grant

[Brief explanation of drawings]

FIG. 1 is a relay system diagram of a conventional call waiting service, and FIG. 2 is a relay system diagram showing an embodiment in which the present invention is applied to a call waiting service. SUBA...Call waiting service subscriber, KU...Key unit, OBIS...Out-of-band signal interface subscriber side device, OBIS...Out-of-band signal interface station side device, SCH...Out-of-band signal converter, CC...Common control unit, NGUSMC...Number group user memory control unit, NGUSM...Number group user memory.

Claims (1)

[Scope of Claims] 1. A control method for controlling the start and stop of a telephone service from the subscriber terminal side, comprising: means for sending a service start/stop signal to the subscriber terminal as an AC signal outside the audible band to a telephone line; , a means for receiving and identifying the start/stop signal of the service, which is inserted in the middle of the subscriber line that directly connects the exchange and the subscriber terminal within the exchange, and a service based on the identification result of the reception identifying means. service start/stop from the subscriber terminal side.
A telephone service start/stop method characterized in that a telephone service start/stop signal can be received at any time in accordance with a stop request. 2. Claim 1, wherein the telephone service start/stop signal is a single frequency signal, a frequency shift signal, a phase shift signal, or a multifrequency signal which are outside the audible band and are different from each other. Telephone service start/stop method.