HUAWEI CQ1 SL91 4-Port Channelized STM-1 For Huawei Interface Board

The functional version of CQ1 boards is SL91.

Application:

CQ1 boards apply to OptiX RTN 910 NEs to transparently transmit STM-1 services over packet radio networks. CQ1 boards receive/transmit only channelized STM-1 services.

CQ1 boards are used in the following scenarios:

STM-1 services are transparently transmitted over packet radio networks.

Multiprotocol Label Switching (MPLS) tunnels traverse a TDM network.

Circuit emulation service (CES) E1 services are converged to channelized STM-1s.

Transparently Transmitting STM-1 Services over Packet Radio Networks

Figure 1 Application scenario of CQ1 boards (1)

Carrying MPLS Tunnels over a TDM Network

Figure 2 Application scenario of CQ1 boards (2)

Converging CES E1 Services to Channelized STM-1s

Figure 3 Application scenario of CQ1 boards (3)

NOTE:

The IF boards shown in Figure 1 to Figure 3 must be general-purpose IF boards or cross polarization interference cancellation (XPIC) IF boards working in native E1+Ethernet or native STM-1+Ethernet mode.

Functions and Features:

CQ1 boards receive and transmit four channels of channelized STM-1 optical/electrical signals.

Table 1 lists the functions and features supported by CQ1 boards.

Table 1 Functions and features that CQ1 boards support.

Working Principle and Signal Flow:

This section describes how the function units of a CQ1 board process channelized STM-1 optical signals.

Function Block Diagram

Figure 1 CQ1 board function block diagram

Signal Processing in the Receive Direction

Table 1 Signal processing in the receive direction of a CQ1 board

Signal Processing in the Transmit Direction:

Table 2 Signal processing in the transmit direction of a CQ1 board

Control Signal Processing:

The CQ1 board is directly controlled by a CPU on the system control and communication unit. The CPU issues configuration and query commands to other units of the board over the control bus. These units send command responses, alarms, and performance events to the CPU unit over the control bus.

The logic control unit decodes the address read/write signals from the CPU.

Power Supply Unit

The power supply unit receives two -48 V power supplies from the backplane. It then converts the -48 V power supplies into +3.3 V power and supplies the +3.3 V power to other units on the board.

Clock Unit

The clock unit performs the following operations:

Extracts line clock signals or E1 clock signals and transmits them to the system control and communication unit.

Receives system clock signals from the control bus on the backplane and supplies clock signals to other units on the board.

Front Panel:

A CQ1 board has indicators and STM-1 ports on its front panel.

Front Panel Diagram

Figure 1 Front panel of a CQ1 board providing optical ports

Figure 2 Front panel of a CQ1 board providing electrical ports

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