Optical Wavelength Conversion Unit. STM-64 Transmitting Optical Wavelength Conversion Unit with FEC Function, страница 15

n  Provide on-line monitoring interface: a spectrum analyzer or multi-channel processing board MS2 of OptiX BWS 320G system can be accessed through this optical interface and monitor the spectrum of the main channel without interrupting the services.

n  Detect the optical power, communicate with the main control board and NM system through the mailbox, report board alarms and performance events, receive the setting commands sent from NM and display the alarms by indicators.

n  Perform remote on-line loading of board software.

3. Application

n  The input optical signals of D32 board usually come from "OUT" of WPA board or from "RO" of SCA board. At the receiving end of the open equipment, D32 outputs 32 wavelength channels to other receiving end optical wavelength conversion boards; while at the receiving end of the integrated equipment, D32 outputs 32 wavelength channels to 32 SDH equipment.

n  D32 can be inserted in 4~13 board positions of OptiX BWS 320G subrack.

n  The optical connector on D32 board handle bar is of SC type.

n  The spectrum of the main channel can be monitored through the "MON" optical interface on D32 handle bar, the output optical power of "MON" optical interface is 1/10 of the input optical power of "IN" optical interface

4. Alarms and performances

Alarms of D32 board are shown in Table 3-11.

Table 3-11 List of D32 board alarms

Performances reported by D32 board include: output optical power, heating /cooling current, chip working temperature.

1. Principle

MR2 board is also called Dual-channel add/drop multiplexing Unit. According to the module functions, it mainly consists of the optical module and electrical module. The optical module consists of a OADM optical module to add/drop two wavelength channels and a optical module to accomplish the multiplexing of the two wavelength channels, and at the same time the optical module provides middle state to connect another add/drop unit for more wavelength adding/dropping local station; optical module have two specification:100GHz space or 200GHz space. The electrical module is mainly composed of circuit communicating with the mailbox and performs the functions of communicating with the SCC board. The principle block diagram of MR2 board is shown in Figure 3-11.

Figure 3-11 Function block diagram of MR2 board

2. Function

n  Add/drop two service channels with fixed carrier wavelengths at OADM station.