JPH0575673A - Operating system diagnostic system in duplex operation of terminal equipment block - Google Patents

Abstract

PURPOSE:To set active/standby state to a terminal equipment by recognizing an operating system of a terminal station equipment without changeover of the terminal station equipment with respect to the operating system diagnostic system diagnosing the operating system for a terminal equipment block through an I interface. CONSTITUTION:The system is the operating system diagnostic system in terminal equipment block configured in duplicate in which different data A,B are sent from two terminal equipments 2,3 of one station 1 to other station 5 via a terminal station equipment 4 through an I interface, after the other station 5 receives the data A by a terminal equipment 6, the data A are returned to the one station 1 via the terminal station equipment 4 through loopback, the two terminal equipments 2,3 of the one station 1 receive the data A, from which of the two terminal equipments 2,3 the received data A are sent is checked to diagnose the operating system as to which of the two terminal equipments 2,3 is the active system and which of them is the standby system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a branch service in a terminal section duplex mode, which conforms to the TTC standard (TTC is the Telegraph and Telephone Technical Committee: THE TELECOMMUNICAT.
ION TECHNOLOGY COMMITTEE), which is a dedicated line user / network interface I interface, diagnoses the operation system in the terminal section, and relates to the operation system diagnosis method in the terminal section duplication.

[0002]

2. Description of the Related Art A branch service is provided in a transmission service of a high-speed digital line. This branch service is different in form between the conventional Y interface (user / network interface according to the NTT specification) and the new I interface (user / network interface according to the TTC standard).

FIG. 3 shows a branch service form of the Y interface, and FIG. 4 shows a branch service form of the I interface.
Shown in. In FIGS. 3 and 4, reference numeral 21 denotes a terminal (DT
E), 22 is a digital line terminating device (DSU), 23
Is a branch connection equipment (MJE), 24 is a terminal equipment (CNE)
Is. In the branching service in the I interface (hereinafter referred to as terminal section duplexing), as shown in FIG.
4, the communication in the receiving direction of the terminal device 21 is always connected to multiple terminals. The transmission direction of the terminal 21 is automatically switched to the branch line side when the basic line side fails. However, the terminal device 24
Cannot notify the operating system to the terminal 21, so that the terminal 21 cannot determine which of the basic line and the branch line is the active system or the standby system.

FIG. 5 shows a conventional working / spare setting method for solving this problem. In FIG. 5, terminal 25 (D
When the TE # 1) is set to the active system, the controller 26 forcibly causes the terminal 27 (DTE # 0) to fail (shown in the figure), and the terminal 25 (DTE # 1) is set. To the active system (shown in the figure). At this time, the terminal device 24 switches to the direction of the terminal device 25 (DTE # 1) (shown in the figure), and the working setting of the terminal device 25 (DTE # 1) is completed.

[0005]

However, the switching in the terminal equipment 24 nominally takes 4 to 5 seconds, during which a cycle deviation occurs. Therefore, if the operation mode of the terminal device 24 can be recognized, the active / standby setting can be performed without causing the switching operation. Therefore, the status may be artificially obtained from the terminal device 24 side.

The present invention has been made in consideration of such a situation, and in the terminal section duplication of the I interface (new high speed digital line), the terminal station apparatus 24 is switched without switching the terminal station apparatus 24. The purpose is to recognize the operating system and set the working / standby of the terminals 25 and 27.

[0007]

FIG. 1 is a block diagram showing the configuration of an I interface used in the present invention. The operating system diagnostic method in the terminal section duplication of the present invention will be described with reference to this figure. The present invention is a branch service in a terminal section duplexing mode. In an I interface as a dedicated line user / network interface compliant with the TTC standard, one station 1 duplicates two terminals 2, 3 to a terminal station. Different data A, B are transmitted via the device 4 to the other station 5
Terminal 6 of the other station 5 receives the data A, and then returns the data A to the terminal device 4
Via one of the two terminals 1 and 2 and the data A is received by the two duplicated terminals 2 and 3, and which of the two terminals 2 and 3 receives the received data A. It is an operating system diagnosis method in terminal section duplication, which consists of checking whether or not the data is transmitted from the device and diagnosing which one is the current one and which is the spare.

[0008]

According to the present invention, since the operating system can be diagnosed without causing any trouble, it is possible to set the working and standby of the two terminals 2 and 3 without the occurrence of a cycle deviation.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. The present invention is not limited to this.

FIG. 2 is a block diagram showing the configuration of the I interface used in the present invention. A concrete embodiment of the present invention will be described with reference to this figure. In FIG. 2, reference numeral 11 is a local station, 12 is a local control section provided in the local station 11,
Reference numerals 3 and 14 denote line termination units (NP # 0, NP #) on the local station 11 side.
1: network port), 15 is a terminal device (CN
E), 16 is another station, 17 is another station side control unit provided in the other station 16, and 18 is a line termination unit (NP #) on the other station 16 side.
2) and 19 are digital line terminators (DSU # 1, D
SU # 2, DSU # 3), 20 is a control bus on the local station 11 side, 21 is a data bus on the local station 11 side, 22 is a control bus on the other station 16 side, and 23 is a data bus on the other station 16 side. .

The local station 11 and the other station 16 communicate with each other in a point-to-point form, and the local station 11 side duplicates the terminal section. Line termination units 13, 14,
A terminal device (DTE) (not shown) is connected to each of 18 (NP # 0, NP # 1, NP # 2). Line termination units 13 and 14 of own station 11 (NP # 0, NP # 1)
The same conditions even after switching (use time slot etc.)
Since this must be the case, the active / standby switching is performed by connecting / disconnecting the data bus 21.

The operation will be described with reference to FIG. 2. First, the control unit 12 of the own station 11 causes the line termination units 13 and 14 (NP
Patterns A and B are assigned to # 0 and NP # 1), respectively. A in the line termination unit 13 (NP # 0)
To the transmission data of the local station 11 side, and the line termination unit 14 (N
In P # 1), B is multiplexed with the transmission data on the local station 11 side. In this case, from the terminal device 15 (CNE),
Only one of the data A and B is transmitted to the other station 16.

Next, in the other station 16, the control unit 1 of the other station 16
7 issues a data loopback command to the line terminating unit 18 (NP # 2), and loops back the data from the local station 11 to the local station 11. In the terminal device 15 (CNE), the line terminal units 13 and 14 (NP # 0, N
The data from the other station 16 is transmitted to both P # 1).

In this way, in the local station 11, the data received by the line terminating units 13 and 14 (NP # 0, NP # 1) is issued to the line terminating unit 13 (NP # 0). The pattern A is compared with the pattern B issued to the line terminating unit 14 (NP # 1), and the matching one is recognized as the working side of the terminal device 15 (CNE). And
The local station side control unit 12 controls the line termination units 13 and 14 (NP #
0, NP # 1), the command to connect or disconnect the data bus 21 is issued to set the active / standby operation system.

In this way, the terminal device 15 (CNE)
The operating system of the terminal device 15 (CNE) is recognized without switching between the line termination units 13 and 14 (NP # 0,
NP # 1) active / spare settings can be made.

[0016]

According to the present invention, the operating system of the terminal device can be recognized by the terminal side without switching the operating system of the terminal device, so that the operating system can be diagnosed without causing any trouble. Therefore, it is possible to set the working and standby settings in the two terminals without causing a cycle deviation. In addition, it is possible to reliably perform maintenance on the terminal side.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a block diagram showing a configuration of an I interface for explaining an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a branch service form of a Y interface.

FIG. 4 is an explanatory diagram showing a branch service form of an I interface.

FIG. 5 is an explanatory diagram showing a conventional current / spare setting method.

[Explanation of symbols]

11 Local station 12 Local station side control unit 13, 14, 18 Line termination unit (NP # 0, NP # 1,
NP # 2) 15 terminal station device (CNE) 16 other station 17 other station side control unit 19 digital line terminating device (DSU # 0, DSU #
1, DSU # 2) 20, 22 Control bus 21, 23 Data bus

Claims (1)

[Claims] 1. An I interface as a dedicated line user / network interface conforming to the TTC standard, which is a branch service in a terminal section duplexing mode, has two duplexed terminals (2, 3) of one station (1). )
Transmits different data (A, B) from the terminal device (4) to the terminal (6) of the other station (5), and the terminal (6) of the other station (5) transmits the data (A). ), The data (A) is returned and the terminal device (4) is returned.
To one station (1), and the one station (1) receives the data (A) at the two duplicated terminals (2, 3), and the received data (A) is duplicated. Check which one of the two terminals (2, 3) has sent the data, and diagnose which one is the current one and which one is the backup,
An operating system diagnostic method for duplexing terminal sections.