Информатика и выч. техника \ Сетевое программное обеспечение

Optical Wavelength Conversion Unit. STM-64 Transmitting Optical Wavelength Conversion Unit with FEC Function, страница 4

n RWF can be inserted in 1 ~ 13 board position of OptiX BWS 320G subrack.

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

4. Common alarm performance

RWF board mainly consists of optical receiving module and optical transmitting module, so its alarms mainly reflect the working status of these two modules. Alarms of RWF board are shown in Table 3-2.

Table 3-2 RWF board alarm table

Alarm description	Alarm name	Major cause of the alarm	Status of alarm indicator	Default alarm level
Loss of signal at receiving side	R-LOS	No light input	Flash 3 times continuously every other second	Critical
Out-of-frame at receiving side	R-OOF	Input optical power too low or excessive error codes during transmission	Flash 3 times continuously every other second	Critical
Loss of frame at receiving side	R-LOF	Input optical power too low or excessive error codes during transmission	Flash 3 times continuously every other second	Critical
Laser transmitting failure	TF	Fault occurs to laser of this board	Flash 3 times continuously every other second	Critical
Laser service life will soon end	LSR-WILL-DIE	Laser damaged	Flash 3 times continuously every other second	Critical
Laser cooling current cross threshold	LSR-COOL-ALM	Laser damaged or ambient temperature too high	Flash twice continuously every other second	Major
Input power too low	IN-PWR-LOW	Input optical power too low	Flash 3 times continuously every other second	Critical
Input power too high	IN-PWR-HIGH	Input optical power too high	Flash 3 times continuously every other second	Critical
Transmitter deterioration	TD	Performance of laser deteriorates	Flash 3 times continuously every other second	Critical
Output power too high	OUT-PWR-HIGH	Optical transmitting module fault or board parameter setting improper	Flash twice continuously every other second	Major
Output power too low	OUT-PWR-LOW	Optical transmitting module fault or board parameter setting improper	Flash twice continuously every other second	Major
Alarm of board not in position	BDSTATUS	No board in subrack slot, board mailbox fault or board not inserted properly	Flash twice continuously every other second	Major
Regeneration section (B1) signal deterioration	B1SD	Input optical power too low or excessive error codes during transmission	Flash once every other second	Minor
Regeneration section (B1) excessive error codes	B1EXC	Received signal attenuation too large	Flash once every other second	Minor

3.1.3 STM-16 Transmitting Optical Wavelength Conversion Unit

1. Principle

The role of TWC board in OptiX BWS 320G system is to convert the optical wavelengths at the transmitting end and make the OptiX BWS 320G system become an open DWDM system. Its major function is to convert the STM-16 optical signals in the wavelength range of 1280~1565nm and in compliance with ITU-T G.957 recommendation into STM-16 optical signals with standard wavelengths recommended in ITU-T G.692, so that the signals can be multiplexed into one optical fiber.

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