Nortel Networks 3500, NTRN10AN manual OC-3 optical interface circuit pack NTN401AA, DA

Hardware feature descriptions 3-77

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.

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

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.

Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004