JPS62253295A - System for storing control information of line concentrating stage - Google Patents

Abstract

PURPOSE:To reduce the hardware and to simplify the control of a line concentrating stage so as to make the device highly reliable, by integrating a line concentrating switch holding memory and subscriber circuit control memory into one memory. CONSTITUTION:A line concentrating switch holding memory SCM and subscriber circuit control memory SDM are integrated into one memory. In this case, if an address designating signal, chip selecting signal, and write-enable signal are the same signal, the memories are logically regarded as one memory. When the bit length of a bus is sufficient long, a subscriber circuit control pattern SDPTN and a bit of line concentrating switch connecting information NEN are combined and written as one word by order against the address LEN of the memory. Moreover, the memory SDM or SCM is accessed by using an one-bit bracketing signal.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for storing control information in a concentrator stage of a digital subscriber line exchange.

(Prior art) Conventionally, as a technology in this field, for example, [Shin Aizawa-ed. "Easy Disotal Exchange" 83 Telecommunications Association P.
There was one described in ``153 Concentration Stage Communication Channel''.

FIG. 4 shows a first configuration example of a concentrator switch and a subscriber circuit control circuit in a concentrator stage of a conventional digital exchange.

Concentrator switch SPM is on! ll (time division network T
The direction toward DNW) performs random write/sequential read operations, and the downstream direction (direction toward 5LIC) performs sequential write/random read operations. In other words, the concentrator switch holding memo IJscM is addressed by the subscriber number LEN, and the contents of the memory are addressed by the trunk line side channel number NEN.
It becomes. Also, subscriber circuit control memo IJ SDM
is addressed by the subscriber number LEN, and the contents of the memory are the subscriber circuit rI signal pattern 5DPTN.

The connection of the east line switch and the control of the subscriber circuit are carried out in separate orders.

FIG. 5 shows a second configuration example of a concentrator switch and a subscriber circuit control circuit in a concentrator stage of a conventional digital exchange. FIG. 5 shows the connection switch SPM shown in FIG. 4 above,
The upper side performs sequential write/random read operations, and the lower side performs random write/sequential read operations.In other words, the concentrator switch holding memo 178CM is addressed by the trunk line side channel number NEN, and the contents of the memory are addressed by the subscriber number LEN. The difference is that Therefore,
The advantage compared to configuration example 1 shown in FIG. 4 is that the capacity (number of words) of the concentrator switch holding memo IJ SCM is reduced. In other words, since generally the number of subscriber circuits, that is, the number of LEN, is greater than the number of channels on the trunk line side, that is, the number of NENQ, the concentrator switch has a lower number of trunk line side channel numbers NEN than when addressing with the subscriber circuit number LEN.
This means that the number of words will be smaller if the addressing is done using .

It is also possible to operate the upstream and downstream functions separately, that is, one side can be operated as sequence/kill write/random read, and the other can be operated as random write sequence/kill read.
A configuration intermediate to that shown in the figure is also possible. Further, by addressing the subscriber circuit control memo IJ SDM with the trunk line side channel number NEN, it is possible to reduce the number of words.
This can be easily inferred from the "time division switch control system".

FIG. 6 shows a third configuration example of a concentrator switch and a subscriber circuit control circuit incorporating such a system.

The block indicated by the broken line will be described later, but the subscriber circuit control memo IJsIIM is installed on the trunk line side of the concentrator switch SPM, and is addressed by the trunk side channel number NEN. The user circuit control pattern 5DPTN is connected to the east line switch SP along with call information.
reaches the subscriber circuit 5LIC through M and reaches the subscriber circuit 5LI
Control C.

In this configuration, as in the configuration shown in FIG. 4, the connection of the concentrator switch and the control of the subscriber circuit are performed in separate orders. However, in this case, even if the subscriber is not in a call state, necessary subscriber circuit control information, such as information on driving the circuit for setting the supply state of current for call detection, etc., is stored in the subscriber number LEN. Some parts will remain in the same form as in Figures 4 and 5, as they are necessary for correspondence. The blocks indicated by broken lines in FIG. 6 indicate this.

Through all the above methods (both in the case of Fig. 4 and the case of Fig. 6), the subscriber circuit control memo IJ SDM and the concentrator switch holding memory SCM, which are addressed with the same addressing information, are accessed in different orders. Therefore, the memory elements are separate, and the control circuits around the memory are also separate circuits, resulting in a large number of circuits and complicated software control.

(Problems to be Solved by the Invention) In the concentrator stage of a conventional digital subscriber line exchange, connections of concentrator switches are controlled by storing connection information in a concentrator switch holding memory.

Further, the status setting of the subscriber circuit is controlled by storing control information in a subscriber circuit control memory that is separate from the concentrator switch holding memory.

In this case, the concentrator switch holding memory and subscriber circuit control memory are accessed as separate orders, and the order interpretation control unit and memory write/read control unit are provided separately, so... had the disadvantage that it had a large number of circuits and was complicated to control in terms of software.

The present invention has been made to solve these problems, and furthermore, the concentrator switch holding memory and the subscriber circuit control memory can be connected by using the same order interpretation control unit and memory write/read control unit. It is an object of the present invention to provide a method for storing control information of a concentrator stage, which is constructed using the same memory as the memory, and which reduces the number of circuits and simplifies software control.

(Another means to solve the problem) In order to achieve this object, the present invention provides
A digital subscriber line exchange concentrator that controls the original by storing connection information in the east line switch holding memory and still controls subscriber circuit state settings by storing control information in the subscriber circuit control memory. In this stage, the concentrator switch holding memory and the subscriber circuit control memory are controlled by the same addressing signal, chip select signal and write enable signal.

(Function) According to the above-described means, the concentrator switch holding memory and the subscriber circuit control memory are integrated into one element including the implementation, or the addressing signal and the write enable signal are made the same and logically integrated. Since it is configured,
-.- cords can be reduced and control can be simplified, making the line concentrator more economical and highly reliable.

(Example) Examples will be described below with reference to the drawings.

FIG. 1 is a diagram showing a first embodiment of the present invention.

The concentrator switch holding memo +78CM and the subscriber circuit control memo IJ SDM are integrated into one memory. Even if the devices are implemented by separate mounters, if the address designation signal, chip select signal, and write enable signal are the same signal, they can be logically considered to be one memory.

There are two methods for performing subscriber circuit control and concentrator switch connection in FIG. The first method is to write the subscriber circuit control terminal 5DPTN and the concentrator switch connection information NEN together as one word in an order to the address LEN of the memory.

This method is suitable when the bus has a sufficient bit length.

The second method, as shown in FIG. 2, uses a 1-bit signal to determine whether to access the subscriber circuit control memo IJ SDM or the east line switch holding memory SCM. Although it looks the same as the configuration shown in FIG. 4, the address designation signal and write enable signal are the same signals, and only the chip select signal is different in that one signal has the inverted logic of the other. (The first
In the figure, the subscriber circuit control circuit and the concentrator switch are separate circuits. ) The method shown in Figure 2 is subscriber circuit control/flat turn 5.
DPTN and concentrator switch connection information NEN are memory element S
Suitable when sharp for DM and SCM.

FIG. 3 is a diagram showing a second embodiment of the present invention.

In FIG. 3, as in the case shown by the broken line in FIG. 6, the control required for subscriber support remains as is, but here, the subscriber circuit control memory SDM and concentrator switch holding memory SCM are integrated. This is omitted to focus on the expression. This embodiment is the same as the first embodiment except that the memory addressing is the channel number NEN on the trunk line side.
Since the control method is the same as that of the embodiment, detailed explanation will be omitted. The fact that there are two methods for subscriber circuit control and concentrator switch connection in the first embodiment is the same in this embodiment, and a part of the above-mentioned FIG. It is also possible to replace it in the same way as shown in Fig. 2.

(Effects of the Invention) As explained above, by using the storage method of the control information of the concentrator stage of the present invention, the concentrator switch holding memory and the subscriber circuit control memory are integrated (integrated into one element, including implementation). By making the addressing signal and the write enable signal the same and logically integrating them, it is possible to reduce hardware and simplify control, which has the effect of making the line concentrator more economical and highly reliable.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a first embodiment of the present invention, Fig. 2 is an explanatory diagram of Fig. 1, Fig. 3 is a block diagram showing a second embodiment of the present invention, and Fig. 4 is a conventional diagram. Configuration example 1 of a concentrator switch and subscriber circuit control circuit in a concentrator stage of a digital exchange,
FIG. 5 shows a second configuration example of a concentrator switch and subscriber circuit control circuit in the concentrator stage of a conventional digital exchange, and FIG. 6 shows a third example of the configuration of a concentrator switch and subscriber circuit control circuit in the concentrator stage of a conventional digital exchange. SUB...Subscriber terminal, 5LIC...Subscriber circuit,
SPM... solid line switch, TDNW... time division network, LEN... memory address, 5DPTN
...Subscriber circuit control pattern, NEN...Concentrator switch connection information, SDN...Subscriber circuit control memory, SC
M... Line concentration switch holding memory, INF... Interface section, BUS... Bus. Patent applicant: Oki Electric Industry Co., Ltd.
h-〒, j, t=xmFigure 3Figure 4 °°°“Puff↑ BUS? 3) Figure 6 Procedural amendment (self-restraint) Indication of case 1985 Patent application No. 093447 2, storage method of control report in title of invention collection line 3 Person making amendment Relationship with case Patent application Address (105) 1-7-12-4 Toranomon, Minato-ku, Tokyo
, Agent address (105) 1-7-1 Toranomon, Minato-ku, Tokyo
No. 2 No. 6, Contents of amendment (1) In the third line of page 11 of the specification, r SDN J is amended to read “SDM J.”

Claims (2)

[Claims] (1) A digital subscriber that controls the connection of the concentrator switch by storing connection information in the concentrator switch holding memory, and controls the state setting of the subscriber circuit by storing control information in the subscriber circuit control memory. Storage of control information in a line concentrator stage of a line exchange, characterized in that the concentrator switch holding memory and the subscriber circuit control memory are controlled by the same address designation signal, chip select signal and write enable signal. method. (2) A method for storing control information in a concentrator stage according to claim 1, characterized in that the same element is used as the concentrator switch holding memory and the subscriber circuit control memory.