Technical information

Installation
199
Peripheral Interface Cards and Modules
Table 31: Peripheral Interface Cards and Modules
Peripheral
interface
card
Devices supported Circuits
Maximum loop
resistance/loop lengths
COV Line card
high power
Voice Mail devices 6 Loop resistance: 280 W
Loop length:
26 AWG - 1000 m (3300 ft.)
24 AWG - 1500 m (5000 ft.)
22 AWG - 2000m (6000 ft.)
DID Trunk
card
high power
Direct Inward Dial (DID)
trunks from CO
6 Loop resistance: 2450 W (includes
set resistance)
Loop length:
26 AWG - 7986 m (25955 ft.)
22 AWG - 19995 m (64984 ft.)
LS/GS Trunk
card
low power
Ground start and Loop
start CO trunks
6 not applicable
LS/CLASS
Trunk card
low power
Loop Start CO trunks 8 not applicable
ONS/CLASS
Line card
low power
DTMF telephone sets
Rotary telephone sets
12 External loop resistance:
600 W (includes set resistance)
External wire resistance:
400 W
External loop length:
22 AWG - 3560 m (11700 ft.)
24 AWG - 2250m (7400 ft.)
OPS Line card
high power
(low power in
SX-200
EL/ML)
DTMF telephone sets
Rotary telephone sets
6 External loop resistance: 1800 W
(includes set resistance)
External wire resistance:
1600 W
External loop length:
26 AWG - 7225 m (23700 ft.)
22 AWG - 18290 m (60000 ft.)
(Sheet 1 of 3)