KR100311310B1 - Subscriber interface apparatus for fiber loop carrier-d - Google Patents

Abstract

According to the present invention, a plurality of voice and signal interface blocks mounted on a subscriber interface board of a COT device can be detachably modularized to selectively accommodate different types of subscribers through one subscriber interface board regardless of subscriber type. The present invention relates to a voice subscriber interface device for an optical subscriber transmission system. To this end, the present invention provides a module in which each interface block in a subscriber interface board is composed of N sets of interface block pairs, each of which is responsible for N subscriber signals. It can be mounted on the subscriber interface board freely and detachably through the contact pin and the contact hole, and also it can be configured in the form of a mixture of different subscriber interface blocks on one subscriber interface board. Many other When accommodating customers, the unnecessary waste of subscriber interface boards can be prevented, effectively reducing the cost of operating / maintaining COT equipment, as well as simple module replacement to troubleshoot subscriber interface boards in COT devices. It can be realized simply.

Description

Voice subscriber interface device for optical subscriber transmission system {SUBSCRIBER INTERFACE APPARATUS FOR FIBER LOOP CARRIER-D}

The present invention relates to a subscriber interface device for a small-capacity optical subscriber transmission system (FIBER LOOP CARRIER-D: FLC-D), and more particularly, for a general subscriber interface board, a public telephone subscriber interface board, and a voice-only subscriber. The present invention relates to a voice subscriber interface device for an optical subscriber transmission system, which is suitable for smoothly corresponding installation of a desired subscriber type by improving the structure of a board in a voice subscriber interface device having an interface board.

As is well known, the optical subscriber transmission system (FLC) is a device for multiplexing subscriber DS0, DS1, DS1E signals into an STM-1 signal in synchronous multiplexing, and transmitting the optical signal at 155.520 Mbps. It is mainly composed of Central Office Terminal (COT) on the exchange side and Remote Terminal (RT) on the subscriber side. Here, the COT device is located in a telephone station or the like to transmit a subscriber signal provided from the RT device to an exchange or inter-station transmission device, and the RT device is a subscriber side (for example, a collective house requiring a large capacity line). , An apartment complex, a building, etc.) and connected to a plurality of subscriber stations and / or private exchanges.

The services provided by these transmission systems include various voice class lines (e.g., up to 480 lines), digital data lines of 2.4 to 64 Kbps and N × 64 Kbps, and dedicated lines of ISDN BRI and DS1 and DS1E. They are performed by a common channel that converts DS1 and DS1E signals to STM-1 signals in synchronous hierarchy, and a channel channel that converts voice and digital data and ISDN subscriber signals into DS1E signals.

Here, the COT device is composed of a rack, a channel self, a common self, an alarm concentrator, a heat ring part, and the RT device is divided into an indoor type and an outdoor type. In the case of an indoor RT device, a rack, channel self, and common self It consists of power distribution and alarm concentrator, thermal ring and RT power. The present invention relates to an improvement of an apparatus for interfacing a voice subscriber in a COT apparatus.

On the other hand, the COT apparatus for transmitting subscriber signals between the RT apparatus and the exchange or inter-station transmission apparatus includes a voice subscriber interface device, a data subscriber interface device and an ISDN subscriber interface device, wherein the voice subscriber interface device according to the present invention Includes a general subscriber interface board, a public telephone subscriber interface board, and a voice-only subscriber interface board.

In addition, as shown in FIG. 1 as an example, the subscriber interface board 100 employed in the COT device of the optical subscriber transmission system (FLC-D) is usually designed to accommodate 12 subscribers, and each subscriber interface is provided. The boards 120/1-120/12 are divided into a voice interface block (VIB) and a signal interface block (SIB), that is, a 12 subscriber interface board is divided into a voice interface block and a signal interface block. Contains 12 sets of interface block pairs. In FIG. 1, the control block 110 includes, for example, a microprocessor to perform overall operational control (eg, signal processing and call transmission and reception control for call processing) of the voice subscriber interface device.

Here, the voice interface block (VIB) is a block for processing the user voice signal of the analog form provided from the subscriber side (that is, the RT device side) through the telephone line (or dedicated line) in a full-duplex manner, the signal interface block (SIB) Is a block for performing ring detection (normal subscriber), polarity detection (public telephone subscriber), loop detection (voice dedicated subscriber), and the like for call processing. Here, the voice-only subscriber means a subscriber connected through a small capacity private exchange.

On the other hand, the voice interface blocks respectively provided in a plurality of interface block pairs in a general subscriber, public telephone subscriber or voice dedicated subscriber interface board are composed of substantially the same circuit to process subscriber voice signals in the same manner, but the signal interface block These circuits are composed of different types of circuits according to their subscriber types, and perform processing such as ring detection (general subscriber), polarity detection (public telephone subscriber), and loop detection (voice dedicated subscriber) for call processing.

That is, in the case of processing a general subscriber signal (in the case of a general subscriber interface board), a hook-off signal generated from the general subscriber side (ie, a telephone) and input through a telephone line is a signal interface in the RT device → optical cable → COT device. The ring signal generated from the exchange is transmitted to the path of the block → the exchange, and in response, the ring signal generated from the exchange is transferred to the path of the signal interface block → the optical cable → the RT device → the general subscriber's side (ie, the telephone) in the exchange → the COT device. When selecting (ie dialing) a digit, the corresponding DTMF signal is routed from the RT device to the fiber cable to the signal interface block in the COT device to the exchange. Therefore, each signal interface block in the general subscriber interface board of the COT apparatus is provided with circuits for detecting and processing the hook-off signal, ring signal, and DTMF signal generated as described above.

In addition, when processing public telephone subscriber signals (i.e. for public telephone subscriber interface boards), if a user inserts a coin or telephone card into the card slot for use of the telephone, the exchange will then A polarity reversal signal is generated and delivered to the signal interface block in the COT device. Therefore, in the signal interface block in the public telephone subscriber interface board of the COT apparatus, a circuit for detecting and processing the polarity reversal signal for charging must be separately provided.

On the other hand, when processing a voice-only subscriber signal (in the case of an interface board for a voice-only subscriber), when the hook-off signal is transmitted to the exchange, the exchange will privately ring the ring signal, unlike in the case of a general subscriber or a public telephone subscriber. Instead of forwarding to the exchange, an occupancy acknowledgment signal indicating that the loop is occupied is generated and passed to the signal interface block in the COT device. Therefore, the signal interface block in the voice-only subscriber interface board of the COT apparatus must separately include a circuit for detecting and processing the loop occupancy confirmation signal.

That is, a circuit for detecting and processing a polarity reversal signal for charging is provided in each signal interface block of the public telephone subscriber interface board of the COT device, and a loop occupancy confirmation signal is provided in each signal interface block in the voice-only subscriber interface board. Circuitry for detecting and processing the is provided separately.

Therefore, in the related art, one subscriber interface board processes only one type of subscriber, that is, the general subscriber interface board is composed of 12 sets of general subscriber interface block pairs to process only 12 general subscriber signals and an interface for public telephone subscribers. The board consists of 12 sets of public telephone subscriber interface blocks to process only 12 public telephone subscriber signals, and the voice-only subscriber interface board consists of 12 sets of voice dedicated subscriber interface blocks to process only 12 voice dedicated subscriber signals. It is configured to

However, as described above, when the entire interface for one subscriber is configured to cover the same subscriber (ie, general subscriber, public telephone subscriber, or voice-only subscriber), the subscriber interface board is employed more than necessary, i.e., subscriber. There is a problem that the result is an unnecessary waste of the interface board.

For example, assuming that the total number of subscribers accommodated by a voice subscriber interface device in a COT device is 500, a regular subscriber is 302, a payphone subscriber is 148, and a voice only subscriber is 50, theoretically, the RT device With only 42 subscriber interface boards, all subscriber signals can be handled, but in practice there are 26 regular subscriber interface boards, 13 public phone subscriber interface boards, and 5 voice-only subscriber interface boards, for a total of 44 subscribers. You need an interface board.

Therefore, there is a problem that the interface board for subscribers is wasted unnecessarily due to the above reasons, and this waste is one of the factors that increase the cost of operating / maintaining the COT device.

On the other hand, the conventional subscriber interface board is composed of a form in which the voice interface block is formed of one PCB board, soldered and fixed on the interface board, and each circuit element constituting the signal interface block is mounted on the interface board, respectively. Each signal interface block is formed of one PCB board and soldered onto the interface board.

On the other hand, the subscriber interface device in the COT device is provided with a protection circuit to protect the high voltage (i.e., hundreds to thousands of V) generated by, for example, lightning strikes, since it can flow over the telephone line. Despite having such protection circuits, failures are often caused by high voltage flowing through the telephone line. In particular, the voice and signal interface blocks are very affected by the high pressure generated by lightning, etc., which often causes the voice or signal interface block to fail.

Therefore, the administrator who operates / maintains the COT device removes the failed interface board from the COT device when any one of the interface blocks in the subscriber interface board fails, and replaces the new spare interface board in place. The interface board in the COT device is restored to its normal state by inserting it, and the interface board removed from the COT device due to the failure is returned to the repair station for troubleshooting.

To this end, in order to prepare for the failure of the subscriber interface board in the prior art, a plurality of subscriber interface boards must be prepared in advance, so that the costs for maintenance / repair are inevitably incurred. On the contrary, if the manager of the COT device can configure the subscriber interface board for each voice or signal interface block mounted on the subscriber interface board, the cost for maintenance can be greatly reduced.

For example, instead of having five subscriber interface boards as spare interface boards for maintenance / repair as before, if only five to ten voice and signal interface blocks are provided as spare interface blocks, respectively, It will significantly reduce the cost of maintenance and repair, and will also make it easier and simpler to restore a failed subscriber interface board to its normal state.

Accordingly, the present invention is to solve the problems of the prior art described above, by detachably modularizing a plurality of voice and signal interface blocks mounted on the subscriber interface board in the COT apparatus, regardless of the subscriber type for one subscriber An object of the present invention is to provide a voice subscriber interface device for an optical subscriber transmission system that can selectively accommodate different types of subscribers through an interface board.

Another object of the present invention is an optical subscriber transmission system that can easily carry out a reduction in maintenance costs and trouble-shooting by detachably modularizing a plurality of voice and signal interface blocks mounted on a subscriber interface board in a COT device. To provide a voice subscriber interface device for use.

In order to achieve the above object, the present invention provides a subscriber signal interface for a mobile communication service between a remote terminal (RT) connected through an optical cable and an exchange or inter-station transmission device, and N sets of interface blocks comprising voice and signal interface blocks. A voice subscriber interface device of a central station terminal (COT) for an optical subscriber transmission system (FIC-D) comprising a plurality of subscriber interface boards each configured in pairs to process N subscriber signals, respectively. The interface board is composed of a general subscriber interface board, a public telephone subscriber interface board, and / or a voice-only subscriber interface board, and each of the voice and signal interface blocks is configured in a module form and is placed on each subscriber interface board. Detachable freely mounted on It provides a voice subscriber interface device for an optical subscriber transmission system.

1 is a schematic block diagram showing, by way of example, one subscriber interface board employed in a COT device of an optical subscriber transmission system (FLC-D);

2 is a block diagram showing only a control block in a subscriber interface board and one subscriber interface block pair as an example;

FIG. 3A is a diagram illustrating a state in which a detachable voice and signal interface block module is removed from one interface block pair consisting of a voice interface block and a signal interface block; FIG.

Figure 3b is a module external view of a voice or signal interface block mounted detachably on a subscriber interface board in accordance with a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

210: control block 220: interface block pair

222: protection block 224: interface block

224a: voice interface block 224b: signal interface block

226: conversion block 302: voice interface connection area

302a, 304a: contact hole 304: signal interface connection area

306: module case 308: contact pin

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram of a subscriber interface board mounted with a control block mounted on the subscriber interface board and N sets of interface block pairs (for example, 12 sets as shown in FIG. For the sake of brevity, a block diagram showing only the control block 210 and only one interface block pair 220 is shown. That is, only one interface block pair 220 is shown as an example in FIG. 2 because each interface block pair mounted on the subscriber interface board is configured with substantially the same circuit to perform the same signal processing.

Referring to FIG. 2, the interface block pair 220 includes a protection block 222, an interface block 224, and a conversion block 226, wherein the interface block 224 includes a voice interface block 224a and a signal interface block. 224b.

First, the control block 210 is substantially the same as the control blow 110 shown in FIG. 1, which provides overall operational control (e.g., call processing) for all subscriber interface boards mounted in the voice subscriber interface device. Signal processing and transmit / receive control), for example, when the signal interface block 224b is for a general subscriber, the hook-off signal detected by the signal interface block 224b is converted into a PCM signal, which is not shown through the PCM bus. Pass to the FIU of the COT device, invert the PCM-converted ring signal provided from the FIU via the PCM bus and pass it to the signal interface block 224b, and also A / D conversion and D / A in the conversion block 226 Control the conversion.

In addition, the protection block 222 is configured between the telephone line (not shown) and the interface block 224 to remove the high pressure (for example, several hundreds to thousands of V) flowing through the telephone line, for example, a high voltage generated by lightning, etc. It removes it when it flows in through this telephone line, and it can be comprised using the clamp circuit for high pressure removal. That is, the protection block 222 performs a protection function to prevent a failure in the interface block 224 due to the high pressure flowing through the telephone line.

Next, the voice interface block 224a in the interface block 224 interfaces user voice signals transmitted and received between the RT apparatus and the COT apparatus, and mixes the subscriber side voice and the remote subscriber side voice in a full duplex manner to protect the block. And transmits the subscriber-side voice (i.e., analog voice signal) provided through the protection block 222 to the conversion block 226 via the line L21, and through the line L22 to the conversion block 226. The remote subscriber-side voice provided from is mixed with the subscriber-side voice (voice provided from protection block 222) in a full duplex manner and forwarded to the protection block 222.

Further, the conversion block 226 converts the subscriber voice signal in analog form provided from the voice interface block 224a through the line L21 into a digital signal (PCM signal) under the control from the control block 210. Transmit to a FIU (not shown) via the PCM bus, convert the digital remote subscriber-side voice signal (PCM signal) when provided via the PCM bus into an analog voice signal and then to the voice interface block 224a via line L22. To pass.

On the other hand, the voice interface block 224a mounted (adopted) on the subscriber interface board according to the present invention is different from the conventional block formed of one PCB board and soldered and fixed on the subscriber interface board. As shown in the figure, it is configured in a module form and is detachably mounted on the subscriber interface board.

More specifically, referring to FIG. 3B, the voice interface block 224a manufactured according to the present invention includes an interface block configured using one PCB board mounted on the module case 306, and the module case 306 of the module case 306. Mounted to a subscriber interface board via a plurality of contact pins 308 extending outwardly from one side, i.e., through a corresponding number of contact holes 302a in the voice interface block connection area 302 shown in FIG. 3A. It is connected to the subscriber interface board.

Next, the signal interface block 224b in the interface block 224 is subjected to ring detection (call subscriber), polarity detection (public telephone subscriber), loop detection (for call processing) according to control from the control block 210. Voice-only subscriber), etc., for general subscriber signal, such as hook off signal, ring signal, digit signal translation, etc., and for public telephone subscriber signal, detect and process polarity reversal signal for charging. In addition, in the case of a voice-only subscriber signal, a function of processing a loop occupancy confirmation signal is separately performed.

At this time, the signal interface block 224b, like the voice interface block 224a described above, is configured in a module form and is detachably mounted on the subscriber interface board. That is, as shown in FIG. 3B, the plurality of contact pins 308 are mounted on the subscriber interface board through the plurality of contact holes 304a in the signal interface block connection area 304 shown in FIG. 3A. do.

That is, each of the subscriber interface boards mounted on the voice subscriber interface device according to the present invention, for example, each interface block mounted on the subscriber interface boards having 12 sets of interface block pairs each serving 12 subscribers. (Ie, 12 voice interface blocks and 12 signal interface blocks) are manufactured in a module form and are detachably mounted through contact pins and contact holes.

Therefore, administrators operating COT devices can simply and easily replace only the signal interface block modules inserted in the subscriber interface mode as needed, thereby allowing different types of subscribers through one subscriber interface board regardless of subscriber type. Can optionally be configured to optimize the COT device without wasting subscriber interface boards.

As an example, assuming that the total number of subscribers accommodated in the voice subscriber interface device is 500, the general subscriber is 302, the public telephone subscriber is 148, and the voice dedicated subscriber is 50, the above-described conventional device has 26 general subscriber interfaces. Although a board, 13 public telephone subscriber interface boards, and 5 voice-only subscriber interface boards are provided, that is, a total of 44 subscriber interface boards are used. It has an interface board, 12 public telephone subscriber interface boards, 4 voice dedicated subscriber interface boards, and also includes two general subscriber interface block pairs, two voice dedicated interface block pairs, and four public telephone interface block pairs. One mixed interface board, ie a total of 42 Voice subscriber interface device can be configured using the subscriber interface board.

Therefore, the voice subscriber interface device according to the present invention can suppress unnecessary waste of the subscriber interface board can effectively reduce the cost of operating / maintaining the COT equipment.

On the other hand, when the voice or signal interface block module according to the present invention is adopted (detachably mounted) on the subscriber interface board, a large number mounted in the subscriber interface board due to the high pressure (hundreds to thousands of V) caused by lightning or the like. If any one or more of the interface block modules (i.e. 12 voice interface modules and 12 signal interface modules) fail, the conventional device removes the subscriber interface board itself with the failed interface block from the COT device. And after mounting a new subscriber interface board prepared in advance for operation / maintenance and transported to the repair station for troubleshooting of the interface board removed from the COT device due to the failure, in the present invention the interface board Failed Interface Block Module (voice or signal interface module block) only when is simply replaced with a new interface eve block modules prepared in advance.

Therefore, in the present invention, unlike the conventional case in which a plurality of subscriber interface boards must be prepared for maintenance and repair of the COT device, only a few voice and signal interface block modules need to be prepared as spare modules, respectively. As a result, the preliminary cost for maintenance / repair can be significantly reduced as compared with the conventional case.

As described above, according to the present invention, each interface block in the subscriber interface board consisting of N sets of interface block pairs each responsible for N subscriber signals in the COT apparatus is manufactured in a module form and detached through contact pins and contact holes. It is possible to freely mount on a subscriber interface board and to configure a subscriber interface block of different types on a single subscriber interface board, so that a subscriber can receive a plurality of subscribers of different types. By reducing unnecessary waste of interface boards, the cost of operating and maintaining COT equipment can be effectively reduced.

In addition, the present invention, unlike the conventional case where a plurality of subscriber interface boards must be prepared for maintenance and maintenance of the COT device, only a few voice and signal interface block modules need to be prepared as spare modules, respectively, Compared to the conventional case, it is simple and easy to troubleshoot, and the preliminary cost for maintenance can be greatly reduced.

Claims (2)

It performs subscriber signal interface for mobile communication service between remote terminal (RT) connected through optical cable and switching device or inter-station transmission device, and consists of N sets of interface block pairs composed of voice and signal interface blocks, respectively. A voice subscriber interface device of a central station terminal (COT) for an optical subscriber transmission system (FIC-D) comprising a plurality of subscriber interface boards for processing, The plurality of subscriber interface boards include a general subscriber interface board, a public telephone subscriber interface board, and / or a voice-only subscriber interface board, and each of the voice and signal interface blocks is configured in a module form. A voice subscriber interface device for an optical subscriber transmission system, which is freely mounted on a subscriber interface board. 2. The apparatus of claim 1, wherein each subscriber interface board comprises at least one voice and signal interface module for the general subscriber, at least one voice and signal interface module for the public telephone subscriber, and at least for the voice dedicated subscriber. A voice subscriber interface device for an optical subscriber transmission system, characterized in that one voice and signal interface module can be configured to be mixed.