Nortel Networks OPTera Metro 3500 - Manual (Page 305)

Hardware feature descriptions 3-77
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Section data communication channel (SDCC)
An OC-12 line carries a DCC channel that can be edited, provisioned, and
deprovisioned. Each OC-12x4 STS circuit pack carries four SDCC channels
(one for each OC-12 port).
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 OC192 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.
Alarm LED definitions
The following table provides a list of LEDs of the OC-12x4 STS optical
interface.
OC-3 optical interface circuit pack
(NTN401AA, DA)
OPTera Metro 3500 supports OC-3 IC and OC-3 LR optical interface circuit
packs.
The OC-3 optical interface circuit pack converts STS-3 signals into OC-3
signals and OC-3 signals into STS-3 signals.
The central wavelength for both the transmit and receive optics is 1310 nm.
Note: 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.
Optical transmit
The STX or VTX-series circuit pack sends STS-3 or STS-3c frames to the
OC-3 interface. The OC-3 optical interface circuit pack converts the STS-3 or
STS-3c electrical signal into an optical signal which is transmitted on the
optical transmit channel.
LED Color Description
Status Red Circuit pack failure
Active Green In service and carrying traffic
LOS(1-4) Yellow Loss of signal on the port