Nortel Networks NTRN10AN, 3500 manual Optical transmit

3-72Hardware feature descriptions

Alarm LED definitions

The following table lists the OC-48 DWDM interface circuit pack LEDs.

LED	Color	Description
Status (top)	Red	Circuit pack failure
	Yellow	Loss of signal
Status (bottom)	Green	In service and carrying traffic

Equipping rules

The OC-48 DWDM circuit pack are equipped in slots 11 and 12 of the OPTera Metro shelf.

Note: Requires the shelf to be equipped with VTX-series circuit packs in slots 13 and 14.

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

OC-12 optical interface circuit pack (NTN404AA, BA, CA, DA, JA, KA, LA, MA)

Four OC-12 circuit packs, OC-12 IR (NTN404KA), IC (NTN404MA), LR (NTN404JA), and ER (NTN404LA) support the VT1.5, STS-1, STS-3c, and STS-12c signal rate as well as STS-12c performance monitoring.

OPTera Metro 3500 continues to support the OC-12 IR (NTN404BA), IC (NTN404DA), LR (NTN404AA), and ER (NTN404CA) optical interface circuit packs, which support the VT1.5, STS-1, and STS-3c, signal rates and associated PMs.

The central wavelength of the transmit optics is 1310 nm for the Interconnect and LR optical reaches, and is 1550 nm for the ER optical reach.

Note 1: The OC-12 circuit pack is considered a core circuit pack when provisioned in slots 11 and 12. In addition, the OC-12 circuit pack can be used as a tributary circuit pack when provisioned in slots 3 to 10.

Note 2: The VTX-48e circuit packs supports the OC-12 line rate for the optics in slots 11 and 12.

Optical transmit

The OC-12 interface receives one STS-12 or STS-12c from each STX and VTX-series circuit packs. The OC-12 interface converts the STS-12 or STS-12c into an OC-12 optical signal. The OC-12 optical signal is then transmitted on the optical transmit channel.

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