JPS62171358A - Maintenance trunk system for subscriber line - Google Patents

Abstract

PURPOSE:To decrease the number of trunks and to structure a subscriber line maintenance system economically by using one kind of subscriber line maintenance trunk which operates in plural kinds of operation modes and changing the operation modes with a control signal according to the purposes of maintenance. CONSTITUTION:A subscriber line test board LTC 10 which includes a multifrequency transmitter/receiver (MFS/R) 11 and an integrated subscriber line maintenance trunk (ILTT) 8 which has three kinds of conventional functions integrally are provided. When a person in charge of maintenance depresses the circuit test key of the LTC 10, the MFS/R 11 sends out the control signal for an operation mode for operating the ILTT 8 in subscriber circuit test trunk mode. When the person in charge of maintenance depresses the continuous origination key of the LTC 10, the MFS/R 11 sends out operation mode information for operating the ILTT 8 in noncharging trunk mode. When a subscriber (SUB) 3 who makes a complaint dials a complaint acceptance telephone number, a multifrequency signal transmitter/receiver (MFS/R) 12 informs the LTC 10 that the ILTT 8 operates in complaint acceptance trunk mode, the (LTC) 10 displays complaint call incoming, and the path of a network (NW) 6 is switched from the MFS/R 12 to the SUB 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a maintenance test system for switching equipment, and more particularly to a subscriber line maintenance trunk system.

〔overview〕

The present invention uses a subscriber line maintenance trunk to operate in multiple types of operation modes as the subscriber line maintenance trunk in a subscriber line maintenance trunk system that maintains subscriber lines corresponding to multiple types of maintenance purposes. By using one type of subscriber line maintenance trunk and changing its operation mode using control signals in accordance with each maintenance purpose to perform subscriber line maintenance, one maintenance trunk can handle multiple types of maintenance trunks. The aim was to realize functions and reduce the number of maintenance trunks, making it more economical.

[Conventional technology]

FIG. 3 is a block diagram showing an example of a conventional subscriber line maintenance trunk system. As shown in FIG. 3, a subscriber line test stand (LTC) 30 is a subscriber line test trunk (LTT) 40 and a complaint reception trunk (CPT) 4.
Maintenance of subscriber lines was carried out using three types of maintenance trunks: 1 and 42 non-charging trunks (FLT). That is, the subscriber line test trunk (LTT) 40 is a call-only trunk, is connected to the line test equipment (LTE) 35 via the network (NW) 36, and connects the non-test subscriber (SOB) 31 to the test link ( TSTLNK) 34
It was connected to the line testing equipment (LTE) 35 and was conducting tests.

Complaint reception trunk (CPT) 11 is a trunk exclusively for incoming calls, and was used to receive and receive complaints from subscribers. The non-charging trunk (FLT) 42 was a trunk for both arrival and departure, and was used for business communications.

In addition, in the figure, 39 is a maintenance link (MLNK).

[Problem that the invention seeks to solve]

The subscriber line maintenance trunk method described above is based on the subscriber test stand (
LTC) 30 and subscriber line test trunk (LTT) 4
0, complaint reception trunk (CPT) 41, and non-charging trunk (1'LT) 42. Therefore, even in a small office, these three single-function trunks are always used per equipment. There were drawbacks that had to be addressed.

An object of the present invention is to provide an economical subscriber line maintenance trunk system by eliminating the above-mentioned drawbacks, realizing the functions of multiple types of maintenance trunks with a single maintenance trunk, and reducing the number of trunks. There is a particular thing.

[Means for solving problems]

The present invention uses a subscriber line maintenance trunk to operate in multiple types of operation modes as the subscriber line maintenance trunk in a subscriber line maintenance trunk system that maintains subscriber lines corresponding to multiple types of maintenance purposes. The present invention is characterized in that subscriber line maintenance is performed by using one type of subscriber line maintenance trunk and changing its operating format using control signals in accordance with each maintenance purpose.

[Effect]

The present invention is capable of operating in multiple types of operating modes (e.g., subscriber line test trunk (LTT), complaint handling trunk (CPT),
), non-charging trunks (FLT), etc.), and the operation mode is changed in accordance with each maintenance purpose to maintain subscriber lines.

Therefore, by simply providing subscriber maintenance trunks, it becomes possible to maintain subscriber lines corresponding to a plurality of types of maintenance purposes.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a subscriber line maintenance system to which an embodiment of the present invention is applied, and FIG. 2 is a partial detailed diagram thereof.

In this embodiment, the multi-frequency signal transmitter/receiver 01F is used as a means for transmitting an operation mode control signal to the exchange when making a call, and receiving an operation style control signal from the exchange when an incoming call is received.
S/R) 11 is provided in subscriber map vA test number (shiTC) 10. A subscriber line test stand (LTC) 10 is connected to an integrated subscriber line maintenance trunk (ILTT) 8 via a maintenance link (MLNK) 9. Note that here, a subscriber line maintenance trunk that integrates three conventional functions will be referred to as an integrated subscriber line maintenance trunk.

Figure 2 shows this integrated subscriber line maintenance trunk (ILTT).
8 is shown as an example. Network (NW
) 6 is connected to a code decoder (CODEC) 14,
A code combiner (CODEC) 14 is connected to one end of a transformer (T) 18 via an amplifier 15.16. The other end of transistor (T) 1B is the maintenance link (MLNK) 9
It extends to The midpoint of one end of the transformer (T) 18 is grounded via a balanced network (BN) 17. Also,
An integrated subscriber line maintenance trunk (ILTT) 3 transmits commands from a central controller (CC) 7 to a network (NW) as a means for receiving or transmitting the operating mode control signals.
) 6 to the trunk controller (CTL) 21 and sent to the maintenance link (MLIN) by the signal transmitter (ST) 20.
) 9 to the subscriber line test stand (LTC) 10, while the subscriber line test stand (LTC)
10 is received by a signal receiver (SR) 19, and a control device (CTL) 21 sends this signal to a central control device (CC).
) connected in communication to 7.

A feature of the present invention is that, in FIGS. 1 and 2, a subscriber line test stand 10 including a multi-frequency transceiver (MFS/I+) 11, a signal receiver (SR) 19, and a signal transmitter (S
T) 20 and an integrated subscriber line maintenance trunk (ILTT) 8 including a trunk controller (CTL) 21.

Next, the operation of this embodiment will be explained.

When the maintenance person presses the line test pair of the subscriber line test stand (LTC) 10, the integrated subscriber line maintenance trunk (ILTT) 8 connects with the subscriber line test stand (LTC) 10 via the maintenance link (to MLN) 9. The activated signal is connected to the Integrated Subscriber Line Maintenance Trough (ILTT) 8 Signal Receivers (SR)
19, and the activation information is sent to the central control unit (CC) via the control unit (CTL) 21. transmitted to. When the central controller (CC) 7 receives the activation signal, it creates a path between the integrated subscriber line maintenance trunk (ILTT) 8 and the multifrequency signal transceiver (MFS/R) 12. Subscriber Line Test Stand (LTC) 10 Multi-Frequency Signal Transmitter/Receiver (MFS/
R) From 11, Integrated Subscriber Line Maintenance Trunk (ILT)
T) 8 sends operating mode control signals operating in the subscriber line test trunk mode and the subscriber number under test.

The central control unit (CC) 7 that receives the signal from the multi-frequency signal transceiver (MFS/R) 12 transmits the signal to the integrated subscriber line maintenance trunk (ILTT) 8 and the multi-frequency signal transceiver (MFS/R) 12.
S/R) 12 and the subscriber (SOB)
1 through a test link (to TSTLN) 4 to a subscriber line test equipment (LTE) 5 and between the subscriber line test equipment (LTE) 5 and an integrated subscriber line maintenance trunk (ILTT) 8. make a pass The subscriber line test stand (LTC) 10 uses this path to control the subscriber line test equipment (LTE) 5 and performs a subscriber line test.

When the maintenance person presses the continuous transmission key on the subscriber line test stand (LTC) 10, the subscriber line test stand (LTC)
C) 10 is connected to an integrated subscriber line maintenance trunk (ILTT) 8 via a maintenance link (MLNK) 9, and the integrated subscriber line maintenance trunk (ILTT) 8 is connected to a multi-frequency signal transceiver via a network (NW) 6. (MFS/R)
Connected to 12. Multi-frequency signal transmitter/receiver (MFS/R
)11, Integrated Subscriber Line Maintenance Trunk (ILTT)
8 operates in a non-charging trunk mode;
The incoming subscriber number is sent. Central control unit (CC) 7
disconnects the current path, calls the terminating subscriber (SOB) 2, and when the subscriber (SLIB) 2 answers, the subscriber (SUB)
B) 2 and integrated subscriber line maintenance trunk (rLTT) 8
Make a pass with.

If the called subscriber is from another station, outgoing trunk (OCT)
It is connected to other stations via 13.

On the other hand, when the complainant subscriber (SOB) 3 dials the complaint telephone number, the central controller (CC) 7 sends a command to the integrated subscriber line maintenance trunk (ILTT) 8, and the integrated subscriber line maintenance trunk (ILTT) 8 sends a command to the integrated subscriber line maintenance trunk (ILTT). ILTT) Signal transmitter (ST) 20 in B provides subscriber line test stand (LTC) 1
Send an incoming signal to 0. Subscriber line test stand (LTC) 1
When the incoming call display appears on 0 and the maintenance person answers, the integrated subscriber line maintenance trunk (
ILTT) 8 is connected to a subscriber line test stand (LTC) 10, and an integrated subscriber line maintenance trunk (ILTT) 8 and a multi-frequency signal transmitter/receiver (MFS/R) 12 are connected on the network (NW) 6. be done. transmitting from the multi-frequency signal transmitter/receiver (MFS/R) 12 to the subscriber line test stand (LTC) 10 that the integrated subscriber line maintenance trunk (LTT) 8 operates in a complaint trunk manner;
A subscriber line test stand (LTC) 10 displays an incoming complaint call, and the path of the network (NW) 6 is a multi-frequency signal transmitter/receiver (MFS/R) 12 to a complain subscriber (SOB).
) Switch to 3.

In addition, if the contact call is made to the subscriber line test stand (LTC) 10, follow the same procedure as above to the subscriber line test stand (LTC) 10.
LTC) 10 is called, and when the maintenance person answers, the Multi-Frequency Signal Transmitter/Receiver (MFS/R) 12 informs the subscriber line test stand (LTC) that it will operate in a non-charging trunk mode.
TC) 10 operates in a non-charging trunk termination mode.

〔Effect of the invention〕

As explained above, the present invention uses one type of subscriber line maintenance trunk that operates in multiple types of operation modes, changes its operation mode using control signals in accordance with each maintenance purpose, and maintains the subscriber line. Therefore, each subscriber line maintenance trunk can handle the functions of multiple types of maintenance trunks, such as subscriber line test trunks (LTT), complaint trunks (CPT), and non-charging trunks (FLT). There are effects that can be achieved.

Therefore, according to the present invention, it is possible to construct a subscriber line maintenance system economically, and the effect is particularly great in small capacity stations.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a subscriber line maintenance system to which an embodiment of the present invention is applied. FIG. 2 is a block diagram showing an example of the integrated subscriber line maintenance trunk. FIG. 3 is a block diagram showing the configuration of a conventional example. 1.2.3.31...Subscriber (SOB), 4.34
...Test pull link (TSTLNK), 5.35
...Subscriber line testing equipment (LTE), 6.36...
・Network (肚), 7.37...Central control unit (
CC), 8...Integrated subscriber line maintenance trunk (ILT)
T), 9.39...Maintenance link (MLNK), 10.
30... Subscriber line test stand (LTC), 11.12
...Multi-frequency signal transmitter/receiver (MFS/R), 13...
・Outgoing trunk (OGT), 14... code decoder (C
ODEC), 15.16...Amplifier, 17...Balanced network (BN), 18...Transformer (T)
, 19... Signal receiver (SR), 20... Signal transmitter (ST), 21... Trunk control device (CTL)
, 40...Subscriber line test trunk (LTT), 4
1... Complaint reception trunk (CPT), 42...
- Free Trunk (FLT). yl 1 Figure Embodiment 2 Conventional example 3 Figure

Claims (1)

[Claims] (1) In a subscriber line maintenance trunk method that uses subscriber line maintenance trunks to maintain subscriber lines corresponding to multiple types of maintenance purposes, A subscriber line maintenance trunk system characterized in that subscriber line maintenance is performed by using different types of subscriber line maintenance trunks and changing their operation formats using control signals in accordance with each maintenance purpose.