JPH02270457A - Line accommodation class automatic setting system - Google Patents

Abstract

PURPOSE:To eliminate the need for the line accommodation class setting work with a maintenance personnel and to improve the maintenance performance by using a signal received from a line so as to identify whether the line accommodation class is an extension or a relay line thereby setting the line accommodation class automatically. CONSTITUTION:When an REC 21 of a COT 2 receives an input signal from a line, the REC 21 sends a control signal to a CTL 3. Thus, the CTL 3 discriminates whether the signal received by the REC 21 is an extension signal or a relay line signal and controls an SEL 13 to send a signal generated in the GEN 12 in the IOT 1 to a line in the case of the extension signal and the CTL 3 controls the SEL 13 so as to send the signal generated in the GEN 22 in the COT 2 to the line when the input signal is a relay line signal.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a line accommodation type setting method.

[Conventional technology]

Conventionally, the setting of the line accommodation type in a switching device has been carried out by manually switching a switch included in the accommodation type setting circuit to the "extension line" side or the "trunk line" side.

FIG. 2 is a blower diagram showing an example of a conventional line accommodation type setting method.

In Figure 2, this example shows an extension trunk (hereinafter referred to as ■○T) 1 and a trunk line connected to the line (hereinafter referred to as C0T) 2.
, a control circuit (hereinafter referred to as CT-L) 4, and an accommodation type setting circuit (hereinafter referred to as 5ET) 7 having a switch 6, and l0TI is comprised of a signal receiving circuit (hereinafter referred to as REC) 11.
Signal generation circuit (hereinafter referred to as GEN) 12. The signal selection circuit is equipped with 5EL)13, and C0T2 is REC21°Gl? , N22.

When the maintenance person switches switch 6 to the "extension" side,
CTL4 controls GEN12 in 10TI, and operates 5EL13 to output the signal generated in GEN12 from the switching device to the line. Also, regarding the signals input from the line to the switching device, only the signal received by REC11 of COT1 is valid (the signal received by REC21 of COT2 is invalidated). This sets the line accommodation type to "extension".

Next, when the maintenance person switches switch 6 to the "trunk line" side, CTL4 controls 5EL13 to
EN22 selects the generated signal and outputs it to the line, and the signal input from the line is sent to REC2 of C0T2.
Only the signal received by 1 is valid. This sets the line accommodation type to "trunk line".

[Problem to be solved by the invention]

In the conventional line accommodation type setting method described above, a maintenance person manually switches the switch attached to the accommodation type setting circuit in the switching equipment to either the "extension line" side or the "trunk line" side. Since the type of line to be accommodated is set by the system, setting errors often occur and the switching equipment does not operate properly.

[Means to solve the problem]

G) Line accommodation type automatic setting method of the present invention is a switching device capable of accommodating both "extension lines" and "trunk lines" in one line, a signal receiving circuit for receiving signals of the line, and a signal receiving circuit for receiving the signal of the line; a signal generation circuit that generates a signal to be sent to the line, a signal selection circuit that selects which of the "extension line" signal and the "relay line" signal to send to the line, the signal reception circuit 2 signal generation circuit, and and a control circuit that controls the signal selection circuit.
The input signal from the line accommodated in the switching device is identified as either the “extension” signal or the “relay line” signal, and depending on the identification result, the line accommodation type of the switching device is determined as “extension” or “relay line”. It is characterized by being self-defeatingly set to either "Middle♀;T Izumi".

〔Example〕

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

FIG. 1 is a block diagram showing an embodiment of the line accommodation type automatic setting method of the present invention, and the same components as in the conventional example are given the same reference numerals as in FIG. 2. That is, this embodiment is different from the conventional example to 5ET5. The switch 6 (both shown in FIG. 2) is omitted, and the control circuit (hereinafter referred to as CTL) 3 identifies the type of input signal and automatically controls line accommodation type setting.

Next, the operation of this practical example will be explained.

When the REC 21 of the C0T2 receives an input signal from the line, it sends a control signal to the CTL3. This allows CT
L3 determines whether the signal received by REC21 is an "extension" signal or a "relay line J signal," and if it is an "extension" signal, it sends the signal generated at GEN 12 in T1 to the line. 5EL13, and at this time CTL3 receives the input signal from the line as RECll.
The RECll is controlled so that the one received at is valid. Also, if there is an input signal or a signal for a "relay line",
CTL3 controls 5EL13 to send the signal generated in (1) GE N22 in C0T2 to the line, and at this time, CTL3 controls REC21 so that the input signal received by REC21 is valid.

〔Effect of the invention〕

As explained above, in the present invention, the switching device identifies whether the line accommodation type is "extension line" or "trunk line" based on the signal received from the line and automatically sets the line accommodation type. , it is possible to improve maintainability by eliminating the need for line accommodation type setting work by maintenance personnel. Further, since the accommodation type setting circuit in the conventional system is not required, there is an effect that the circuit configuration of the switching device can be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the line accommodation type automatic setting method of the present invention, and FIG. 2 is a block diagram showing an example of a conventional line accommodation type setting method. 1... Extension trunk (IOT>, 2... Trunk line trunk (COT), 3.4... Control circuit (CTL),
5... Accommodation type setting circuit (SET), 6... Switch, 11.21... Signal receiving circuit (RFC), 1
2.22...Signal generation circuit (GEN), 13...
-Signal selection circuit (SEL).

Claims (1)

[Claims] In a switching device capable of accommodating both an "extension line" and a "trunk line" in one line, a signal receiving circuit that receives signals of the line, a signal generating circuit that generates a signal to be sent to the line; a signal selection circuit that selects which of the "extension line" signal and the "relay line" signal to send to the line; and a control circuit that controls the signal reception circuit, the signal generation circuit, and the signal selection circuit; The input signal from the line accommodated in the switching device is identified as either the "extension" signal or the "relay line" signal, and depending on the identification result, the line accommodation type of the switching device is determined as "extension" or "relay line". A line accommodation type automatic setting method characterized by automatically setting the line accommodation type to one of the "trunk lines".