Section Data Communication Channel (Sdcc) - Nortel NTRN10AN Planning Manual

3-74 Hardware feature descriptions
OC-12 path switching uses nonrevertive protection. There are no permanent
VT1.5, STS-1, STS-3c, or STS-12c protection or working paths. The network
element receives two incoming VT1.5, STS-1, STS-3c, or STS-12c signals:
one from the provisioned working optical interface circuit pack and one from
the switchmate optical interface circuit pack. The network element selects the
better of the two signals.
Protection of path failures on a single OC-12 optical interface completes in
60 ms, but protection of simultaneous path failures on multiple OC-12 optical
interfaces completes in less than 200 ms.

Section data communication channel (SDCC)

An OC-12 line carries a DCC channel that can be edited, provisioned, and
deprovisioned.
Alarm LED definitions
The following table provides a list of LEDS of the OC-12 interface circuit
pack.
LED
Status (top)
Status (bottom)
OPTera Metro 3500 Multiservice Platform
Note: VT1.5 signal rate is supported on OPTera Metro 3500 shelves
equipped with VTX-series circuit packs.
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.
Color
Red
Yellow
Green
NTRN10AN
Description
Circuit pack failure
Loss of signal
In service and carrying traffic
Rel 12.1 Standard Iss 1 Apr 2004