Nortel Networks 1000 - Manual (Page 126)

126 NT1R20 Off-Premise Station Analog Line card
Foreign and surge voltage protection
The NT1R20 OPS analog line card meets UL-1489 and CS03 over-voltage
(power cross) specifications and FCC Part 68 requirements for hazardous
and surge voltage limits.
Table 51 "OPS analog line card - power
requirements" (page 125) shows the maximum power consumed by the
card from each system power supply.
Ringer limitations
The OPS line card supports up to three NE-C4A (3 REN) ringers on each
line for either ONS or OPS applications. See
Table 52 "OPS analog line
card - ringer limitations" (page 126) .
Table 52
OPS analog line card - ringer limitations
ONS Loop Range
Maximum Number of
Ringers (REN)
0–10 ohms 3
> 10–460 ohms 2
0 – 10 ohms 3
> 10 – 900 ohms 2
> 900 – 2300 ohms 1
The OPS line card supports up to three NE-C4A (3 REN) ringers on each
line for either ONS or OPS applications. See
Table 52 "OPS analog line
card - ringer limitations" (page 126) .
Environmental specifications
Table 53 "OPS analog line card - environmental specifications" (page
126)
shows the environmental specifications of the OPS analog line
card. Table 53 "OPS analog line card - environmental specifications" (page
126) shows the environmental specifications of the card.
Table 53
OPS analog line card - environmental specifications
Parameter Specifications
Operating temperature 0

to +60

C (+32 to +140

F), ambient
Operating humidity 5 to 95% RH (non-condensing)
Storage temperature –40

to +70

C (–40

to +158

F)
Operation
The applications, features, and signaling arrangements for each unit on the
NT1R20 OPS analog line card are assigned through LD 10 and/or jumper
strap settings on the card.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.