A device with both SDH and PCM functions

Abstract

The utility model discloses a kind of equipment with SDH and PCM function, including cabinet and equipment mainboard;The cabinet of equipment is the box of 19 inch 1U height;System control circuit, transmission link interface, power interface, several functional module slots and wiring port composition are installed on equipment mainboard;Functional module slot can be loaded into several E1 module, ethernet module, telephone module, and other service module;Transmission link interface can be single SFP optical port or double SFP optical port.RJ45 socket can be directly connected RJ11 or RJ45 plug, or through conversion cable realizes the connection of DB9, DB25 etc. connector. Multiple ZMUX-3038GE equipment can be connected into ring network through optical fiber, and any equipment can insert or solve local service data signal through DXC, so as to achieve equipment mutual communication.

Description

Technical Field

[0001] This utility model relates to the field of communication equipment technology, and in particular to a device that combines SDH and PCM functions. Background Technology

[0002] SDH (Synchronous Digital Hierarchy) technology defines a complete set of hierarchical standardized digital transmission structures. It can multiplex various digital service signals as payloads (payload refers to the service information bit portion of the network node interface bitstream) into standardized framed bitstreams according to a prescribed structure. After scrambling and electrical / optical conversion, these streams are transmitted over optical fiber lines. It also defines a unified rate series and a unified interface standard. Currently, a consensus has been reached worldwide on the basic software and hardware issues of SDH.

[0003] The SDH frame structure reserves a certain proportion of overhead for the network management system, which greatly enhances the network's operation, maintenance and management functions, facilitates centralized and unified management, and significantly saves on maintenance costs.

[0004] SDH offers high transmission rates and large capacities, leading to the development of self-healing networks to ensure transmission quality. A ring network composed of SDH equipment with self-healing protection can automatically switch to an alternative route and reconfigure services to maintain normal communication in the event of a partial network failure, without human intervention.

[0005] Therefore, SDH optical transceivers are widely used in scenarios requiring high data transmission rates, long transmission distances, and high transmission reliability.

[0006] The technical principle of PCM (Pulse Code Modulation) is based on digital-to-analog conversion.

[0007] PCM systems sample, quantize, and encode analog signals to generate digital signals. These digital signals are then encoded and modulated before being transmitted via a digital transmission network.

[0008] If the receiving side needs to reconstruct the analog signal, then the receiving end needs to perform demodulation and decoding operations in reverse.

[0009] PCM technology is often used to digitally upgrade traditional copper cable transmission systems (such as old-fashioned telephone systems).

[0010] Because PCM has a narrow bandwidth, it can only support relatively low-speed data transmission. Furthermore, PCM has a relatively simple structure, resulting in lower network reliability and a higher susceptibility to bit errors under high-speed and high-density transmission conditions.

[0011] Therefore, PCM is mainly used for low-speed data transmission and in scenarios where the data transmission distance is short. Utility Model Content

[0012] In existing communication network practices, users often need to simultaneously support the transmission of both low-speed and high-speed services while ensuring transmission quality and distance. Therefore, it is often necessary to combine SDH and PCM equipment to form a relatively complex communication system; SDH is responsible for backbone transmission, while PCM is responsible for low-speed service signal access, in order to meet the requirements.

[0013] By combining the technical features of the two devices, this utility model provides a new integrated device that is small in size, aesthetically pleasing, easy to install and operate, and supports SDH transmission interface protocol and PCM services.

[0014] The technical solution adopted by this utility model to solve its technical problem is: A device that combines SDH and PCM functions; the device's chassis is a 19-inch 1U high enclosure; the device's motherboard consists of a system control circuit, a transmission link interface, a power interface, several functional module slots, and wiring ports; the functional module slots can accommodate several E1 modules, Ethernet modules, telephone modules, and other service modules; the transmission link interface can be a single SFP optical port or dual SFP optical ports.

[0015] As a further improvement of this utility model: the connector of the wiring port can be an RJ45 socket, which can be directly connected to an RJ11 or RJ45 plug, or can be connected to DB9, DB25 and other types of connectors through a conversion cable.

[0016] Compared with the prior art, the beneficial effects of this utility model are: a) Simplify the network structure, reduce complexity, and facilitate management and maintenance; b) Offers multiple transmission channel options and supports self-healing ring structures; c) Provides 32 user-selectable interfaces, offering a wide variety of options to facilitate the access of various services; d) The voice interface supports caller ID; e) Can provide a reverse polarity signal; d) Supports remote diagnostics and network management monitoring; comprehensive status display functions facilitate maintenance and management; f) Small size, beautiful design, and easy installation and operation. Attached Figure Description

[0017] Figure 1 This is a partial structural diagram of a device that combines SDH and PCM functions according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a partial structural diagram of a device that combines SDH and PCM functions according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a partial structural diagram of a device that combines SDH and PCM functions according to an embodiment of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the device application principle that combines SDH and PCM functions according to an embodiment of the present invention.

[0018] Figure reference numerals: SFP optical module interface 1, E1 interface 2, E1 module slot 3, Ethernet interface 4, Ethernet module 5, service interface 6, service module slot 7, power interface 8, power module 9, core processor module 10, grounding terminal 11. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] See Figure 1 The device motherboard is equipped with a core processor module 10 and a power module 9, and provides two SFP optical module interfaces 1, one E1 module slot 3, four Ethernet slots for installing 10M Ethernet modules 5, and 32 service module slots 7.

[0021] See Figure 2 and Figure 3 The device has a grounding terminal 11 at each end of the wiring port panel, and its system motherboard is also equipped with 2 SFP optical module interfaces 1, 4 E1 interfaces 2, 4 Ethernet interfaces 4, 32 service interfaces 6, and 2 power interfaces 8. Example

[0022] The device in question is a ZMUX-3038GE, which uses optical fiber as the transmission line. 1. External Dimensions 1.1 The equipment adopts a 19-inch standard chassis with dimensions of 260mm (depth) × 482mm (width) × 44mm (height). 1.2 The device has a 1U height box structure, consisting of a chassis and circuit boards. It can be installed in a 19-inch fully open rack, or used as a desktop device in a stable, dry, and safe place.

[0023] 1.3 The device chassis contains a motherboard with 32 slots. Slots 1 to 32 can accommodate various service modules such as telephone, RS-232, RS-485, and VHF. These correspond to RJ45 sockets marked 1 to 32 on the back of the device. There are also 4 Ethernet slots for 10M Ethernet modules 5, which correspond to RJ45 sockets marked LAN1 to LAN4 on the back of the device.

[0024] 1.4 There is a grounding terminal 11 on each side of the back of the equipment, which is used to connect the equipment to the system rack grounding system.

[0025] The 1.5 wiring port connector is an RJ45 socket, which can be directly connected to RJ11 and RJ45 plugs. It can also be connected to DB9, DB25, DB62, M34(F) and other types of connectors through the conversion cable.

[0026] 2. Work Environment Operating temperature: 0℃~40℃; Relative humidity: ≤90% (25℃); 3. Working power supply Input voltage: -48V; Permissible voltage fluctuation: -36V to -72V; 4 technical indicators 4.1 Transmission Link Interface a) Transmission rate: 155Mb / s; b) Code type: NRZ scrambling code; c) Transmit optical power: >-5dB; d) Receiver sensitivity: >-34dB; e) Connector: LC (optional single-fiber / LC or dual-fiber / LC); 4.2 Wiring Port 4.2.1 User and Loop Interfaces a) Impedance: 200Ω+680Ω||0.1μF; b) Insertion loss: -3 ± 0.75 dB; c) Frequency response: 300~3400Hz (-0.6~+3dB); d) Balance noise: ≤-63.7 dBmop; e) Crosstalk attenuation: ≥65dB; f) Ring resistance: ≥1800Ω; 4.2.2 Ethernet Interface a) Interface type: 10 / 100Base-T; b) Interface speed: 10 / 100Mbps adaptive; c) Transmission rate: N x 2 Mbps (N = 1 ~ 15); d) Protocol: Link layer bridging.

[0027] 4.2.3 E1 Interface a) Bit rate: 2048Kbps±50ppm b) Code type: HDB3 c) Interface impedance: 75Ω unbalanced d) Connector: CC4 Application principle: See Figure 4 Multiple ZMUX-3038GE devices are connected in a ring network via optical fiber. Any device can insert or extract its own service data signal through DXC, thereby enabling communication between devices.

[0028] In summary, any other corresponding modifications made by those skilled in the art after reading this utility model document, based on the technical solution and concept of this utility model without creative mental effort, shall all fall within the scope of protection of this utility model.

Claims

1. A device combining SDH and PCM functions, comprising a chassis and a motherboard, characterized in that: The device has a 19-inch 1U high chassis; the device motherboard is equipped with a system control circuit, a transmission link interface, a power interface (8), several functional module slots and wiring ports; the functional module slots can accommodate several E1 modules, Ethernet modules (5), telephone modules and service modules; the transmission link interface is a single SFP optical port or a dual SFP optical port.

2. The device with both SDH and PCM functions according to claim 1, characterized in that: The device motherboard is equipped with a core processor module (10), which provides two SFP optical module interfaces (1), one E1 module slot (3), four Ethernet slots for installing 10M Ethernet modules (5) and 32 service module slots (7).

3. The device with both SDH and PCM functions according to claim 1, characterized in that: Each end of the connection port is provided with a grounding terminal (11). The mainboard of the device is equipped with 4 E1 interfaces (2), 4 Ethernet interfaces (4), 32 service interfaces (6) and 2 power interfaces (8).

4. The device with both SDH and PCM functions according to claim 1, characterized in that: The device is a ZMUX-3038GE, which uses optical fiber as the transmission line.

5. The device with both SDH and PCM functions according to claim 1, characterized in that: The chassis is a box-type structure measuring 260mm × 482mm × 44mm.

6. The device with both SDH and PCM functions according to claim 1, characterized in that: The connector of the wiring port is an RJ45 socket, which can be directly connected to RJ11 or RJ45 plugs, or connected to DB9, DB25, DB62, or M34(F) type connectors via a conversion cable.

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