Optical Wavelength Conversion Unit. STM-64 Transmitting Optical Wavelength Conversion Unit with FEC Function, страница 9

n  Regeneration function is available., DWDM end output wavelengths can fully meet the wavelength ITU-T G.692 requirement, and multilevel cascade can be realized and super long distance transmission can be achieved.

n  Both the two paths provide the transmission packet monitoring function (CRC error code report, excessive long transmission packet), convenient for locating the faults on the line.

n  Optical wavelengths output from DWDM end fully comply with ITU-T G.692 recommendation, the nominal central frequency is 192.1~195.2THz, and central frequency offset ≤10GHz ( during the service life).

n  The minimum extinction ratio of transmitting optical signals at DWDM end is ≥10dB; eye pattern complies with ITU-T G.957 recommendations; the max. -20dB bandwidth is 0.2 nm; and the min. side-mode suppression ratio is 35dB.

n  LWE board also provides the following monitoring functions: laser bias current monitoring, laser cooling current monitoring, transmitting optical power monitoring and receiving optical power monitoring, etc.

n  Automatic laser shutdown function (ALS) is also available, used for channel protection.

3. Application

n  DWDM end input port "IN" of LWE board receives the 1.25Gbit/s optical signals in compliance with ITU-T G.692 recommendation from the optical demultiplexing board, and DWDM end output port "OUT" sends the 1.25Gbit/s optical signals in compliance with ITU-T G.692 recommendation to the optical multiplexing board.

n  GE end input port "RX" of LWE receives optical signals in compliance with IEEE 802.3Z standards from gigabit router or other GE equipment, while GE end output port "TX" sends optical signals in compliance with IEEE 802.3Z standards to the gigabit router or other GE equipment.

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

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

4. Alarms and performance

Alarms of LWE board are shown in Table 3-5 and the performances reported by LWE board are listed in Table 3-6.

Table 3-5 List of LWE board alarms