Nortel Networks OPTera Metro 3500 - Manual (Page 303)

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)