Nortel Networks NTRN10AN, 3500 manual Protection switch controller PSC NTN412AA

3-100Hardware feature descriptions

Alarm LED definitions

The following table provides a list of the OPTera Packet Edge 2xGigE/FC-P2P circuit pack LEDs. See Figure 3-28 on page 3-47for the 2xGigE/FC-P2P faceplate layout.

LED	Color	Description
Status	Red	When active, indicates that a circuit pack
		equipment failure has been detected.
Active	Green	When active, indicates that the circuit pack is
		active and either at least one of the LAN ports is
		IS (Data) or at least one cross-connect exists
		(SONET).
Link (1-2)	Red	When active, indicates that a SFP module
		failure has been detected.
	Yellow	When active, indicates that one of a LAN port is
		in a "Link down" State. This includes LOS, Loss
		of 8B_10B synch and auto-negotiation in
		progress (for GigE) or FCLINKSTATE not
		ACTIVE (for FC)

Protection switch controller (PSC) (NTN412AA)

The PSC (NTN412AA) controls DS1 equipment protection switching for all 84 DS1 ports, and monitors DS1 status, including alarm conditions and performance monitoring thresholds. If a working DS1 mapper fails, it switches all of the DS1 traffic to the protection DS1 mapper.

The PSC houses all of the relays that do the protection switching for DS1 ports 1 through 28. The PSC is also responsible for the provisioning and maintenance of all DS1 mappers.

Equipping rules

The PSC must be installed in slot 2 before the working and protection DS1 mapper circuit packs can be provisioned.

See Table 3-3 on page 3-6for operational temperature ranges.

Note: PSC circuit pack is supported on OPTera Metro 3500 shelves equipped with VTX- series circuit packs in slots 13 and 14.

OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004