Nortel Networks OPTera Metro 3500 - Manual (Page 307)

Hardware feature descriptions 3-79
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Note: VT1.5 signal rate is supported on OPTera Metro 3500 shelves
equipped with VTX-series circuit packs.
Protection of path failures on a single OC-3 optical interface circuit pack
completes in 60 ms, but protection of simultaneous path failures on multiple
OC-3 optical interface circuit packs complete in less than 200 ms.
Section data communication channel (SDCC)
An OC-3 line carries a DCC channel that can be edited, provisioned, and
deprovisioned.
Note 1: The DS1 service module (DSM) connects to the OPTera Metro
3500 network element through the ports on a host OC-3 or OC-3x4 circuit
pack.
Note 2: As of OPTera Metro Release 12, the default Section DCC
provisioning for optical interfaces provisioned in the slots 3 through 10
will default to disabled. SDCC for the host OC-3 ports must be enabled, in
order for autoprovisioning or manual provisioning of DSM to function.
Note 3: 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 4: 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.
Alarm LED definitions
The following table provides a list of LEDs of the OC-3 optical interface
circuit pack.
LED Color Description
Status (top) Red Circuit pack failure
Yellow Loss of signal
Status (bottom) Green In service and carrying traffic