Optical Wavelength Conversion Unit. STM-64 Transmitting Optical Wavelength Conversion Unit with FEC Function, страница 17

n  M16 can be inserted in 2~13 board positions of OptiX BWS 320G subrack.

n  The optical connector on M16 board handle bar is of SC type

n  The spectrum of the main channel can be monitored through the "MON" optical interface on M16 handle bar; the output optical power of "MON" optical interface is 1/10 of the output optical power of "OUT" optical interface.

4. Alarms and performances

Alarms of M16 board are listed in Table 3-13.

Table 3-13 List of M16 board alarms

Performances reported by M16 board include: output optical power.

1. Principle

The 16-channel demultiplexing unit is habitually called D16 board. According to the module functions, it mainly consists of the optical module and electrical module. The optical module consists of one 16-channel optical demultiplexer and two 10: 90 couplers. It accomplishes the demultiplexing of the 16 wavelength channels and provides on-line optical monitoring interfaces. The optical demultiplexer is of multi-layer dielectric film filter type. The electrical module mainly consists of two parts: optical power detecting circuit and mailbox communication circuit. So the electrical module has the following functions: detect the optical power, alarm and communicate with the main control board. The principle block diagram of D16 board is shown in Figure 3-13.

Figure 3-13 Principle block diagram of D16 board

In Table 3-9, serial No. 01 ~ 16 show the wavelengths and frequencies corresponding to the 16 channels of D16 board.

2. Functions

n  Demultiplex the 16 wavelength channels of the main channel.

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 D16 board usually come from "OUT" of WPA board or from "RO" optical interface of SCA board. At the receiving end of the open equipment, D16 outputs 16 wavelength channels to optical wavelength conversion boards at receiving ends; while at the receiving end of the integrated equipment, D16 outputs 16 wavelength channels to 16 SDH equipments.

n  D16 can be inserted in 2~13 board positions of OptiX BWS 320G subrack.

n  The optical connector on D16 board handle bar is of SC type.

n  The spectrum of the main channel can be monitored through the "MON" optical interface on D16 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 D16 board are shown in Table 3-14.

Table 3-14 List of D16 board alarms