Platform Descriptions
3-8 Issue 8.0 July 2002
The OC-12 is a "quad-size" circuit pack and thus requires four adjacent
low-speed slots as shown in Table 3-1.
NOTE:
Each quad location consists of one command slot and three extension slots. The
command slot address is used in the OC-12 provisioning commands and for reporting
any circuit pack and OC-12 signal-related alarm conditions. The extension slots are
used to gain access to the STS-3 signals, in conjunction with cross-connect
commands, and for reporting tributary related alarms.
Each low-speed shelf can support a maximum capacity of up to four OC-12 circuit
packs. The four circuit packs may be configured to operate independently in an
0x1 unprotected mode or as pairs in a 1+1 protected mode. In a protected mode,
the Service and Protection OC-12 packs must be inserted in quad pairs as
follows:
â– Quads 1 and 2, or
â– Quads 3 and 4.
NOTE:
Quads 2 and 3, or 1 and 4 will not protect each other.
In an all 0x1 configuration, the FT-2000 Release 7.1.0 has the capacity to add/
drop four OC-12 equivalents of traffic. In an all 1+1 protected configuration, the
FT-2000 provides the capacity to add/drop two OC-12 equivalents of traffic. In a
mixed 1+1/0x1 configuration, the capacity is three OC-12 equivalents of traffic.
NOTE:
For Release 7.1.0, OC-12 1+1 links do not support the DCC channel. With
Release 7.2.0, OC-12 1+1 links do support the DCC channel.
â– LS INTFC P1 and P2: Two slots are provided for one protection LAA2/LAA2B DS3
circuit pack and/or one protection LAA4 STS1E circuit pack. Two DS3 or two STS1E
circuit packs cannot be used. The protection DS3 and STS1E circuit packs can be
placed in slot P1 or P2. The S1:1 DS3 circuit pack has been discontinued and replaced
with the S4:4 DS3 circuit pack. The LAA2 DS3 (S1:1) circuit pack is compatible with
Table 3-1. Permitted Slot Locations for the Quad Circuit Pack
OC-12 Quad Slot Locations Command Slot Extension Slots OC-12 Pack AID
1 1A-1B-2A-2B 1B 1A, 2A, 2B ls-1b
2 3A-3B-4A-4B 3B 3A, 4A, 4B ls-3b
3 5A-5B-6A-6B 5B 5A, 6A, 6B ls-5b
4 7A-7B-8A-8B 7B 7A, 8A, 8B ls-7b
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