Nortel Networks 3500 OC12x4 STS IR optical interface circuit pack NTN446CA, Parameters Value

Hardware feature descriptions 3-75

OC12x4 STS IR optical interface circuit pack (NTN446CA)

The OC-12x4 optical interface circuit pack provides the same functionality as the OC-12 optical interface circuit pack, but has four optical lines. The OC-12x4 STS optical interface circuit pack can provide add/drop capability for four OC-12 tributary interfaces. The OC-12x4 STS circuit pack provides STS management capability only: STS-1, STS-3c, and STS12c.

The OC-12x4 optical interface circuit pack comes equipped with LC type connectors that are located on the front of the circuit pack.

Multimode Interworking

The OC-12x4 STS circuit pack supports multimode interworking for short distances (intra-office) if the following condition are met:

•The multimode fiber (MMF) complies with the characteristics as described in ANSI T1.416.01-1999:

Parameters	Value
Core diameter	62.5 ∝m
Cladding diameter	125 ∝m
Attenuation @ 1300 nm	1.0 dB/km (max)
Modal bandwidth @ 1300 nm	500Mhz-km (min)
Dispersion slope	0.093ps/nm2-km
Dispersion minimum	1365 nm (max)

•62.5 ∝m mode-conditioning patch-cord is required on the transmitter at each end of the link.

•The multimode fiber (MMF) link length (excluding mode-conditioning patch cord) is greater than (>) 5 m and less than (<) 500 m.

•Mating receivers either have no ’pigtails’ or use MMF ’pigtails’.

•Mating receiver do not use a single-mode stub for reflectance reduction.

•Mating transmitters are connected to the mode-conditioning patch cords via Single Mode Fiber (SMF).

•Mating receivers meet IR-1/S-4.1 parameters as per ANSI T1.105.06-2002/ITU-T G.957.

•One fiber per direction.

Exception to any of these conditions require consultation with Nortel

Networks.

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