JP2978659B2 - Switching signal control method for input failure. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching signal control system in the event of an input failure, and more particularly to a common control unit of a transmission device having two 2 Mbps interfaces and having a through function from one 2M signal to the other 2M signal. of
For each telephone line that passes from 2M signal to the other 2M signal
On the other hand, the present invention relates to an exchange signal control method when an input failure occurs .

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a conventional switching signal control method for an input failure.

As shown in FIG. 2, this embodiment comprises a speech base 10 for encoding voice signals and exchange signals, and a common control unit (CCE) 20.
And a 2M signal.

In addition, a telephone line that passes through from a 2M signal in which an input failure has occurred to another 2M signal is transmitted from the 2M port without controlling the exchange signal.

[0005]

In the conventional switching signal control method in the event of an input failure, a transmission device having two 2 Mbps interfaces has only a function of dropping or inserting a 2M signal and a communication base.

[0006] For this reason, it is necessary to correct a telephone line that passes through from a 2M signal in which an input failure has occurred to another 2M signal.
Since the correct not perform the control of the exchange signal, in other words, a failure
The generated 2M signal is passed through to one 2M signal and is incorrect
However, there is a problem that a service error is caused because the operation is performed by using the exchange signal of the contents described above .

[0007]

According to the present invention , there are provided two 2M ports each having a 2 Mbps interface, a 2M signal, a drop or insert function of a communication base, and one 2M signal to another 2M signal. in the common control unit of the transmission device having a through function, each
A failure detection circuit for detecting an input failure to the 2M port;
The drop or insert function and the through function
A time slot switching circuit having
The exchange signal corresponding to the telephone line connected to the 2M port
The bit pattern of the signal is stored for each 2M port.
Switch signal register and fault detection of the fault detection circuit
From the one 2M signal to the other 2M signal
The switching signal bit of the telephone line to be
Insert the bit pattern set in the signal register
Input disabled characterized Rukoto a switch signal insertion circuit
A switch signal control scheme in the harm is obtained .

[0008]

[0009]

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

FIG. 1 is a block diagram showing one embodiment of the switching signal control system in the event of an input failure according to the present invention.

The present embodiment shown in FIG.
With two 2M ports with different interfaces
A transmission device having E9 and having a 2M signal, a function of dropping or inserting the communication base 10, and a function of passing from one 2M signal to the other 2M signal.

The CCE 9 has failure detection circuits (hereinafter referred to as DETs) 3a and 3b for detecting an input failure to each 2M port , and a time slot having a drop or insert function and a through function from one 2M signal to the other 2M signal . Switching circuit (TSSW) 4 and 2M ports for each failure
Switch signal registers (hereinafter referred to as REGs) 6a and 6b for storing, for each 2M port, the bit pattern of the switch signal corresponding to the telephone line connected to the telephone line, and detecting the failure of the DETs 3a and 3b from one 2M signal to the other 2M signal. REG6a, REG6a, 6
switching signal insertion circuits (hereinafter referred to as INS) 5a and 5b for inserting the bit pattern set in b.

Next, the circuit operation of this embodiment will be described.

In FIG. 1, when a fault occurs in the telephone line, the DETs 3a and 3b detect a fault in the received signals 1 and 8 from the ports A and B, respectively.

REGs 6a and 6b store bit patterns of exchange signals corresponding to each telephone line at the time of failure, and
When the ETs 3a and 3b detect a failure, the bit patterns set in the REGs 6a and 6b are inserted into the switching signal bits of the telephone line that pass from one 2M signal to the other 2M signal at the INSs 5a and 5b, and the ports A and 5b respectively. B
Transmits the transmission signals 2 and 7 to the game.

[0016]

As described above, according to the present invention ,
Two 2M ports with 2Mbps interface
With 2M signal and drop or insert on talk base
Function and through machine from one 2M signal to the other 2M signal
In the common control unit of the transmission device having
Fault detection circuit that detects input faults to the
Or a time with insert and through functions
・ Connected to the slot switching circuit and each 2M port at the time of failure
The bit pattern of the exchange signal corresponding to the telephone line
A switch signal register to be stored for each M port
The harm detection circuit detects the failure from one 2M signal to the other
To the 2M signal of the telephone line,
The bit pattern set in the exchange signal register is
And a switch signal insertion circuit for inserting, preventing <br/> one switch pair station side when the input fault for each phone line has occurred to slew from 2M signal to the other 2M signal from malfunction It has the effect that it can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a switching signal control method in an input failure according to the present invention.

FIG. 2 is a block diagram showing an example of a conventional switching signal control method for an input failure.

[Explanation of symbols]

 1 Received signal from the game at port A 2 Transmitted signal from the port A to the game 3a, 3b Failure detection circuit (DET) 4 Time slot exchange circuit (TSSW) 5a, 5b Exchange signal insertion circuit (INS) 6a, 6b Exchange Signal register (REG) 7 Reception signal from port B to game 8 Transmission signal from port B to game 9, 20 Common control unit (CCE) 10 Communication board 21 Drop insert circuit

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tomokazu Kato 1-28-28 Mita, Minato-ku, Tokyo NEC Transmission Engineering Co., Ltd. Banchi Miyagi NEC Corporation (56) References JP-A-4-319825 (JP, A) JP-A-62-298244 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04Q 11/00-11/08 H04J 3/00-3/26 H04M 3/22-3/36

Claims (1)

(57) [Claims] 1. A common transmission apparatus having two 2M ports each having a 2 Mbps interface and having a 2M signal, a function of dropping or inserting a communication base and a function of passing one 2M signal to the other 2M signal. System
The control unit detects an input failure to each of the 2M ports.
Failure detection circuit and drop or insert function
And a time slot exchange circuit having the through function
And the telephone line connected to each of the 2M ports in case of failure
The bit pattern of the exchange signal according to the
An exchange signal register for storing the
From the one 2M signal by the fault detection of the harm detection circuit
A telephone line exchange signal that passes through the other 2M signal.
Bits set in the switch signal register.
Switch signal control system in the input disorders characterized by Rukoto a switch signal insertion circuit for inserting the door pattern.