Nortel Networks OPTera Metro 3500 - Manual (Page 292)

3-64 Hardware feature descriptions
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
OC-192 DWDM G.709 FEC optical interface circuit pack
(See
Table 8-11 on page 8-19 in Part 2 of this guide for PEC codes)
The OC-192 DWDM G.709 FEC circuit pack is provisioned in the same way
as other OC-192 circuit packs.
The OC-192 DWDM circuit pack and OMX are required to support DWDM
topologies for OPTera Metro 3500.
Note 1: The OMX does not support 1535.04 nm wavelength.
Note 2: Additional wavelengths for DWDM C-Band may be introduced in
the future.
Note 3: Supports ITU-T G.709/Y.1331 standard.
Section data communication channel (SDCC)
A DWDM OC-192 line carries a DCC channel that can be edited, provisioned,
and deprovisioned.
Note 1: The maximum number of simultaneous SDCC-provisionable
ports on an OPTera Metro 3500 shelf is 34 (the shelf must be equipped with
eight unprotected OC-3x4 or OC-12x4 STS circuit packs in slots 3 through
10, and a protected pair of OC-48 or OC-192 circuit packs in slots 11 and
12).
Note 2: For Nortel Networks interworking and multi-vendor network
scenarios, DCC interoperability can be achieved with the appropriate
provisioning. See Optical Networks Data Communications Network
Planning Guide, NTR710AM.
Forward Error Correction (FEC)
Forward error correction detects and corrects small burst errors of 8 bits on an
STS-48 basis. The FEC feature adds some redundancy parity bits on the
transmit side and removes the bits on the receive side. The OC-192 LR G.709
FEC and OC-192 DWDM G.709 FEC interfaces support standard encoding
and decoding RS-8 (Reed-Solomon) as specific in ITU-T G.709/Y.1331
standards.
Alarm LED definitions
The following table lists the OC-192 DWDM interface circuit pack LEDs.
LED Color Description
Status (top) Red Circuit pack failure
Yellow Loss of signal
Status (bottom) Green In service and carrying traffic