Alcatel 1660SM Technical Handbook page 183

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Double channel multirate transponder (COWLA2) unit
This unit realizes both the 'wavelength assignment' and the 'wavelength regeneration' on the
2 separate channels supported, according to the type of optical interface ('colored' CWDM or
B&W) equipped.
Pluggable CoarseWDM/B&W SFP optical modules are equipped in order to allow maximum
flexibility in channel configuration.
8 possible Coarse WDM modules with SFP transceiver are available with a throughput up to
2.5Gb/s. CWDM
1530–1550–1570–1590–1610 nm).
The configuration of COWLA2 requires the operator to specify for each module the transported
client signal and if the module is colored or B&W.
The transponder unit supports the '3R' functionality for the following signal types:
– FDDI (125 Mb/s);
– Fast Ethernet (125 Mb/s);
– STM1/OC3;
– Escon (200 Mb/s);
– Digital Video (270 Mb/s);
– STM4/OC12;
– Fiber Channel (1.0625 Gb/s); not operative in current release
– FICON (1.0625 Gb/s);
– Gb Ethernet (1.25 Gb/s);
– 2 Fiber Channel (2.125 Gb/s); not operative in current release
– STM16/OC48;
– 2 Gb Ethernet (2.5 Gb/s);
– STM16 w/ FEC (2.667 Gb/s) not operative in current release
•
OADM1 (COADM1) unit
COADM1 unit realizes wavelengths multi–demultiplexing allowing to add/drop 1 channel out of
the 8 supported according to CWDM grid and the pass–through of remaining WDM channels
not terminated.
One specific item per ITU–T channel is foreseen: 1470 – 1490 – 1510 – 1530 – 1550 – 1570
– 1590 – 1610 nm.
The functionality of the board has to be considered for ring application, and performing 'one
side' channel termination: thus, two separate boards are required at a node of the ring in order
to achieve the complete OADM functionality.
'Loss of Signal' detection on CWDM optical signal received is provided in order to support the
standard management of OMSN's. The CWDM LOS detection allows the operator to realize an
efficient and specific maintenance of the network in case of break of ring/linear cables carrying
multiplexed signals.
ED
02
transceiver are ITU–T
not operative in current release
not operative in current release
not operative in current release
not operative in current release
not operative in current release
not operative in current release
not operative in current release
not operative in current release
not operative in current release
grid compliant (1470–1490–1510–
3AL 91669 AA AA
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