JPH01162067A - System for controlling subscriber - Google Patents

Abstract

PURPOSE:To reduce the ineffective holding of a calling line to an uncompleted call and the connection delay of an audible tone sending to an outgoing terminal by executing the transmission and reception of terminal information through a data line between outgoing and incoming exchange stations independently from the connection of the calling line and executing analysis and control in the outgoing side exchange station. CONSTITUTION:A communicating terminal CT11 activates a subscriber ladder exchange station LS111 with a normal procedure and executes a dial number sending to call a CT21. The outgoing LS111 identifies an incoming LS211 to receive an incoming communicating terminal from a received dial number and a terminal information requesting signal(RQ) is transmitted through a signal repeating station STP30 to the incoming LS211. Then, the terminal information of the CT21 are requested. Next, when this RQ is received from the incoming LS211, the outgoing LS111 decides the propriety of the connection based on the condition of the CT21 and the service class of CT11 and CT21, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a subscriber control system, and in particular to a subscriber ladder exchange that accommodates communication terminals, a relay exchange that accommodates communication terminals, and a relay exchange that connects to each exchange via a data link. This invention relates to a subscriber control system in a switching center that does not accommodate originating and terminating ends in a communication network formed by signal relay stations.

[Conventional technology]

In the conventional subscriber control system at exchanges, connections are processed based only on the originating terminal conditions at the station where the originating end is not accommodated, while the terminating terminal conditions (service class, terminal idleness) are analyzed at the terminating station where the terminating end is not accommodated. is under control.

[Problem that the invention seeks to solve]

In the conventional subscriber control method described above, the status of the originating and terminating terminals is controlled by a station that does not accommodate the originating end and a station that does not accommodate the terminating end. Even in this case, it is necessary to connect the telephone line from the unaccommodating switching center on the originating end to the unaccommodating switching center on the terminating end via the relay switching center, and for incomplete calls, invalid use of the telephone line and connection by signal relay are required. The disadvantage is that there is a delay.

In addition, if the call line uses individual line signaling (MF, DP, etc.), audible tones (busy tone, talk tone, etc.) due to an incomplete call at the station accommodating the receiving terminal will not be sent to the calling terminal. There are drawbacks such as the fact that the receiving terminal is controlled by a station that accommodates the incoming call, and the number of call lines being held invalid due to incomplete calls becomes large.

[Means for solving problems]

The subscriber control system of the present invention provides a switching center that accommodates and connects communication terminals, a relay switching center that connects these switching centers that accommodate terminals, and a data line that connects the switching center that does not accommodate communication terminals and the relay switching center. A communication network is formed with the signal relay station connected via the data line, and when the calling terminal unaccommodated exchange receives dial information from the originating terminal, it is connected to the terminating end unaccommodated exchange via the data line and the signal relay station. The signal relay station is equipped with means for transmitting a terminating terminal information request signal and means for analyzing and executing a connection operation based on the collected terminating terminal information, and the signal relay station communicates between any of the switching stations connected thereto. comprising a means for signal relaying data signals, and when the receiving terminal unaccommodating switching center receives the receiving terminal information request signal, it transmits own terminal information to the requesting originating terminal unaccommodating switching center. have the means.

〔Example〕

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

FIG. 1 is a communication network configuration diagram showing an embodiment of the subscriber control system of the present invention. In Figure 1, the communication terminal (hereinafter referred to as CT)
CTs 11 to 1m are accommodated in a subscriber level switching center (hereinafter referred to as LS) 111, and LS11 is connected to a transit switching center (hereinafter referred to as TS) 10, which mainly processes calls to and from CTs 11 to 1m in the first area. Also LS211. The TS 20 mainly processes calls to and from CTs 21 to 2n in a second area different from the first area. Signal relay station (hereinafter referred to as 5TP) 30 is an LSI
11. TSIO, TS20. The LS211 is connected to each other via a data line (SL, S2, S3, S4) and mainly processes the relay of data signals between each switching center. This is a time chart showing an example of an operation procedure at the time of connection, and shows a case where the originating communication terminal is CT11 and the receiving communication terminal is CT21. In this case, first, the CTII activates the LSI 11 in the normal procedure and sends out a dial number to call the CT 21. The originating LSIII identifies the terminating LS 211 that accommodates the terminating communication terminal from the received dial number (including the terminating communication terminal number), and sends a terminal information request signal (hereinafter referred to as RQ) to the terminating LS 211 via SL and 5TP30.34. Transmit to request terminal information (terminal service class, terminal status) of CT21.

When the destination LS 211 receives these R and Q, it extracts information regarding the CT 21 and returns a terminal information response signal (hereinafter referred to as AC) to the origination LS 111. Departing LS111 is arriving L
When this R and Q are received from S211, it is determined whether connection is possible based on the status of C701, CTII, service class of CT21, etc., and if connection is possible, the call line is changed to TSIO,
TSIO is activated using the normal procedure of connecting to the destination LS 211 via the TS 20. Further, if connection is not possible (due to a failure of the destination terminal, busy status, or mismatch of service conditions, etc.), the originating LS 111 sends an audible signal to notify the CTII of this fact.

〔Effect of the invention〕

As explained above, the present invention transmits and receives terminal information between the originating and terminating exchanges via the data line independently of the connection of the telephone line, and analyzes the originating and terminating terminal information at the originating exchange. This control has the effect of reducing the connection delay in invalidation holding of the telephone line for incomplete calls and transmission of audible sound to the originating terminal. Furthermore, since the use of telephone lines due to incomplete calls is reduced, the number of telephone line facilities can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a communication network configuration diagram showing an embodiment of the subscriber control system of the present invention, and FIG. 2 is a time chart showing an example of an operation procedure when a call is made/received between communication terminals in FIG. 1. 10.20...Transmission Switching Station (TS), 11. ~1 m
, 21-2 n-...Telephone terminal (CT), 30-...
Signal relay station (STP), 111, 211... Subscriber ladder switching station (LS), LL, L2. L3...Telephone line,
Sl, S2. S3. S4...Data line, RQ...
Terminal information request signal, AC...terminal information response signal.

Claims (1)

[Claims] A switching center that accommodates and connects communication terminals, a relay switching center that connects these switching centers that accommodate terminals, and a signal relay station that connects the switching center that does not accommodate communication terminals and the relay switching center via data lines, respectively. A communication network is formed, and when the switching center that does not accommodate the originating end receives dial information from the originating terminal, it sends a terminating terminal information request signal to the switching center that does not accommodate the terminating end via the data line and signal relay station. and means for analyzing and executing a connection operation based on the collected incoming terminal information, and the signal relay station has means for signal relaying data signals between any of the switching stations connected thereto. The terminating end unaccommodating switching center includes means for transmitting the own accommodating terminal information to the originating end unaccommodating switching center, which is a request source, when receiving the terminating terminal information request signal. person control method.