Oc12x4 sts ir optical interface circuit pack, Multimode interworking, Oc12x4 sts ir optical interface circuit pack 3-75 – Nortel Networks OPTera Metro 3500 User Manual

Page 303: Multimode interworking 3-75

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Hardware feature descriptions 3-75

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

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:

62.5

µm

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.

Parameters

Value

Core diameter

62.5

µm

Cladding diameter

125

µm

Attenuation @ 1300 nm

1.0 dB/km (max)

Modal bandwidth @ 1300 nm

500Mhz-km (min)

Dispersion slope

0.093ps/nm

2

-km

Dispersion minimum

1365 nm (max)

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