CN1108043C - Narrow-band and broad-band overall led-in equipment - Google Patents

Abstract

The invention discloses a narrowband and broadband integrated access device, which includes a machine frame, a backboard fixed behind the machine frame, and several single boards inserted into the machine frame. Composed of broadband sub-backplanes and interface sub-backplanes, narrowband sub-backplanes provide narrowband buses, wideband sub-backplanes provide broadband buses, and interface sub-backplanes provide external interfaces. Single boards include various narrowband boards, broadband boards, narrowband Broadband integrated boards and power boards, etc., provide several common slots in the chassis, which can be flexibly mixed with the above-mentioned various boards. Narrowband services and broadband services can be provided at the same time or separately in one chassis.

Description

Narrowband and broadband integrated access equipment

1. Technical field

The invention relates to communication equipment, which is an access network equipment, specifically a narrowband and broadband integrated access equipment.

2. Background technology

There are three types of access network equipment: 1. Narrowband access equipment, used to access narrowband services, such as public switched telephone network PSTN services, integrated digital network ISDN services, digital data network DDN services, etc. 2. Broadband access equipment, used to access broadband services, such as asynchronous transfer mode ATM services, asymmetric high-speed digital loop ADSL services, LAN emulation services, etc. 3. Narrowband and broadband integrated access equipment, which can access narrowband services and broadband services at the same time, and has the characteristics of narrowband and broadband integration.

There are generally two ways to realize the existing narrowband and broadband integrated access equipment: one is that the narrowband part and the broadband part are relatively independent, and they each have their own independent frame, which is equivalent to combining the narrowband access device with the broadband part. Broadband access devices are stacked together, this method does not realize the true integration of narrowband and broadband, and the equipment has poor structural consistency; the other is to integrate the narrowband part and the broadband part Local bus technology, this method overcomes the shortcomings of the first method, but the slots of the narrowband part and the broadband part are relatively fixed and cannot be interchanged, and the narrowband bus and the broadband bus must be provided at the same time, resulting in high equipment costs. Business or broadband business is not conducive to popularization and use.

3. Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a narrowband and wideband with good structural consistency, strong flexibility, low cost, narrowband and broadband can be combined and separated, and can realize a smooth transition from narrowband to broadband Integrated access equipment.

The invention comprises a machine frame, a backboard fixed on the back of the machine frame and several single boards inserted into the machine frame. The backplane adopts global bus technology, which can provide narrowband bus and broadband bus at the same time. It consists of three sub-backplanes: narrowband sub-backplane, wideband sub-backplane and interface sub-backplane. Single boards mainly include narrow-band boards, broadband boards, narrow-bandwidth integrated boards, and power boards. The so-called narrow-band integrated board refers to a single board with narrow-band function and broadband function or serves for narrow-band board and broadband board at the same time. Integrated on a single board. Several common slots are provided in the chassis for inserting the above-mentioned boards. These slots are common to all boards, and there is no distinction between narrowband slots and broadband slots. Therefore, a chassis can There are several types of boards that can provide narrowband services and broadband services at the same time.

The narrowband sub-backplane provides a narrowband bus for narrowband boards; the wideband subbackplane provides a broadband bus for broadband boards; the narrowband subbackplane and the wideband subbackplane are separated, and only one of them can be installed during installation. Any one, or two pieces can be installed at the same time; the interface sub-backboard provides a unified external connector, which is the external interface of the device and is used to lead the service interfaces on various boards to the outside of the device. It can be attached to the narrow belt The backplane or wide sub-backplane can also be separated from the narrow-band backplane and wide-band sub-backplane in an independent manner; each single board can only use one of the three sub-backplanes, or any two of them can be used. Block, also can use all three. When only narrowband services need to be provided, the wideband sub-backplane may not be installed to reduce the cost of the narrowband system. When only broadband services are required, the narrow tape backplane may also not be installed.

Compared with the prior art, the present invention has the following advantages: 1. The narrowband service and the broadband service are integrated in one machine frame, and various single boards such as the narrowband board and the broadband board all have exactly the same mechanical size, and are a comprehensive hardware of narrowband and broadband platform. Using the hardware platform as a basic module, the central office equipment and remote equipment of the access network can be constituted, so that the structures of the central office equipment and the remote equipment are exactly the same, and the capacity can be smoothly expanded through module superposition. Therefore, the equipment has a good consistency in structure; 2. The narrow and wide sub-backplanes of the backplane can be separated or installed at the same time. When only narrowband services need to be provided, the wide The cost of the narrowband system, when the device needs to expand broadband services, add a broadband sub-backplane to achieve a smooth transition from narrowband to broadband. When only broadband services are required, the narrow tape backplane may also not be installed. Therefore, the equipment can provide narrowband service and broadband service at the same time, and can provide narrowband service or broadband service separately, and the cost is low; There are broadband slots, and the function of each chassis is determined by the inserted function board and the running software. When adding new services or functions, you only need to increase the type of single board or change the software, without making any changes to the system structure, and the equipment has strong flexibility; 4. Narrowband functions and broadband functions can not only be integrated In a chassis, it can also be integrated on a single board, that is, the so-called narrow-bandwidth integrated board; 5. The narrow-band sub-backplane, wide-band sub-backplane and interface sub-backplane can be independently designed, manufactured, debugged and maintained. Printed circuit boards with different layers can be used respectively, which is beneficial to shorten the product development cycle, improve the maintainability of the equipment, and reduce the cost of the equipment.

4. Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Figure 2 is a slot diagram of the present invention.

Fig. 3 is a structure diagram of the backplane of the present invention.

Fig. 4 is a bus diagram on the narrow tape backplane of the present invention.

FIG. 5 is a bus diagram on the broadband sub-backboard of the present invention.

FIG. 6 is a bus diagram on the interface sub-backboard of the present invention.

5. Specific implementation

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

Chassis 4 is 7U high and 19 inches wide, and can be installed on a standard 19-inch rack. There are 20 slots in the chassis 4 for inserting various types of boards, among which the 2 slots 6 at the left and right ends are dedicated to inserting various power boards, and the 18 slots 5 in the middle are general-purpose slots , they are common to all single boards, there is no distinction between narrowband slots and broadband slots, and can be flexibly inserted into narrowband boards, broadband boards, narrowband integrated boards and power boards, etc. The backplane consisting of the narrow belt sub-backplane 1 , the interface sub-backplane 2 and the wide-band sub-backplane 3 is fixed on the back of the chassis 4 . The backplane adopts a bus structure, which can provide both a narrowband bus and a broadband bus, wherein the narrowband bus is provided by the narrowband sub-backplane 1 , and the broadband bus is provided by the wideband sub-backplane 3 . Generally, narrowband boards use narrowband sub-backplane 1 and interface sub-backplane 2 to provide narrowband services such as public switched telephone network PSTN services, integrated digital network ISDN services, and digital data network DDN services; broadband boards use broadband sub-backplanes 3 and interface sub-backboard 2, used to provide broadband services such as asynchronous transfer mode ATM service, asymmetric high-speed digital loop ADSL service, local area network emulation LANE service, etc.; the narrow bandwidth integrated board uses these three sub-backboards at the same time. For the narrowband system, the wideband sub-backplane 3 may not be installed, so as to reduce the cost of the narrowband system. When it needs to expand the broadband service, the broadband sub-backplane 3 is added, so as to achieve the purpose of smooth transition from narrowband to broadband.

The power board can be inserted into either the dedicated slot 6 or the general slot 5 , that is, the power board can be inserted into any slot in the chassis 4 .

In most cases, narrowband sub-backplane 1 and interface sub-backplane 2 are used at the same time to provide narrowband services. When broadband services need to be expanded, broadband sub-backplane 3 can be added, so that interface sub-backplane 2 can be attached to the narrowband sub-backplane. On board 1, that is to say, the printed circuit boards of the two sub-backplanes are combined together. At this time, the interface sub-backplane only exists as a logical sub-backplane. The advantage of this method is that it facilitates the installation of the printed circuit board, and at the same time increases the wiring area of the printed circuit board. The disadvantage is that it reduces the flexibility of the equipment. The narrow tape backboard 1 has to be installed together.

The narrowband sub-backplane 1 mainly provides a narrowband bus for use by the narrowband service board. It consists of 16 time-division multiplexing TDM buses 8, 2 single-chip MCS51 serial bus 7, test bus 9 and power bus 10, etc. The time-division multiplexing TDM bus 8 is composed of 16 receiving lines DR0-15, 16 transmitting lines DT0-15, clock line CLK and synchronization line SYNC, and is mainly used for carrying voice and data, and transmitting part of signaling. The operating frequency can reach 8MHz, and the clock frequency can reach 32MHz. Two single-chip MCS51 serial bus 7 are in half-duplex mode, composed of SER0 and SER1, used for single-board control and partial signaling transmission in the basic frame, and can work in the main and standby mode according to the inserted main processing board , load sharing or completely independent. The test bus 9 adopts a four-wire method, consisting of 2 internal test lines IA, IB and 2 external test lines OA, OB, mainly used for fault station 112 test, including the test of the public switched telephone network PSTN and the integrated service digital It can also be used for the test of network ISDN, and it can also be used for internal and external line tests of various digital relays and analog relays. The power bus 10 is used to transmit various power supplies required for narrowband services, including +5V, -5V, -48V, -97V, ring current RING, power ground BGND, digital ground DGND and protection ground PGND. The printed circuit board adopts 4 layers.

The broadband sub-backplane 3 mainly provides a broadband bus for use by the broadband service board. It consists of ATM cell bus 12 in asynchronous transfer mode, 10M Ethernet bus 11, high-speed serial port bus 13 and power bus 14. Among them, the asynchronous transfer mode ATM cell bus 12 adopts the definition provided by the Cubit chip, and is composed of 32 data lines CBD0-31 and 5 control lines CBC0-4, which are used for broadband data bearing and exchange, Ethernet bus 11 and high-speed serial port bus 13 is used for single-board control and signaling transmission of the broadband part in the basic frame. The Ethernet bus 11 is composed of the data line ETH and the ground line EGND. The high-speed serial bus 13 is composed of the receiving line HSERR and the sending line HSERT, and its baud rate can reach 5Mbps, the power bus 14 is used to transmit various power supplies required for broadband services, including +3.3V, +1.2V and digital ground DGND. The printed circuit board adopts 6 layers. The interface sub-backplane 2 provides a unified external connector, which is the external interface of the device. 3×32-pin solder-free sockets are used for the external connectors, and there is one on each slot, which is used to lead the service interfaces on various service boards to the outside of the device. In order to make full use of the backplane area, the sub-backplane provides power lines 15 and ground lines 16 at the same time, so as to supply power lines +5V and +3.3V to some common power lines in the power bus 10 of the narrowband backplane and the power bus 14 of the broadband backplane. And the ground wire PGND, DGND play the role of shunt and backup. Printed circuit boards are double-sided.

The three sub-backplanes integrate the narrowband service and the broadband service in one frame, forming an integrated narrowband and broadband hardware platform, so that the device can provide both narrowband service and broadband service, thus realizing the integration of narrowband and broadband Integrated access equipment. The slots in the chassis are common to each other, and the function of each chassis is determined by the inserted function board and the running software. When new services need to be added, it is only necessary to increase the types of single boards or change the software without making any changes to the system structure.

Claims (6)

1. A kind of narrowband and broadband integrated access equipment, it comprises machine frame (4), the backboard that is fixed on the backboard of machine frame (4) and several pieces are inserted in the single board in machine frame (4), it is characterized in that: The backplane adopts a bus structure, including a narrowband bus and a broadband bus, on which there are general slots (5), wherein the narrowband bus is provided by the narrowband sub-backplane (1), and the broadband bus is provided by the wideband sub-backplane (3) Provided that the narrow strap backplane (1) and the wide strap backplane (3) are separated, you can install either one of them, or install both of them at the same time; the interface sub-backplane (2) provides a unified The external connector is the external interface of the device, used to lead the service interfaces on various boards to the outside of the device. It can be attached to the narrowband sub-backplane or wideband The sub-backboard is separated from the wide-band sub-backboard; the single board includes a narrow-band board, a wide-band board and a narrow-bandwidth integrated board with the same size. 2. The narrowband and broadband integrated access device as claimed in claim 1, characterized in that: said backplane is made up of three sub-backplanes, which are respectively a narrowband sub-backplane (1) providing a narrowband bus, a narrowband sub-backplane (1) providing a A broadband sub-backplane (3) for the broadband bus and an interface sub-backplane (2) providing external interfaces; each single board can use only one of the three sub-backplanes, or any two of them, or Use all three. 3. narrowband and broadband integrated access equipment as claimed in claim 1, is characterized in that: the speech of described narrowband bus and data bearing adopt time division multiplexing TDM bus (8), the data bearing of described broadband bus adopts Asynchronous transfer mode ATM cell bus (12). 4. The narrowband and broadband integrated access device as claimed in claim 1, characterized in that: the single board includes a power board, which can be inserted into a special slot (6) or a general slot (5). 5. The narrowband and broadband integrated access device as claimed in claim 1 or 2, characterized in that: the narrowband sub-backboard (1) consists of 16 time-division multiplexing TDM buses (8), 2 single-chip MCS51 serial ports bus (7), test bus (9) and power bus (10). 6. narrowband and broadband integrated access equipment as claimed in claim 1 or 2, is characterized in that: described broadband sub-backboard (3) is composed of asynchronous transfer mode ATM cell bus (12), 10 Mega Ethernet bus ( 11), a high-speed serial port bus (13) and a power bus (14).

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