NT1R20 Off-Premise Station Analog Line card Page 165 of 894

Power requirements

Table 64 shows the maximum power consumed by the card from each system power supply.

Table 64

OPS analog line card – power requirements

Voltage

Tolerance

Current (max.)

 

 

 

±15.0 V dc

± 5%

150 mA

+8.5 V dc

± 2%

200 mA

+5.0 V dc

± 5%

100 mA

–48.0 V dc

± 5%

350 mA

 

 

 

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.

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 65.

Table 65

OPS analog line card – ringer limitations (Part 1 of 2)

 

Maximum Number of

ONS Loop Range

Ringers (REN)

 

 

0–10 ohms

3

> 10–460 ohms

2

 

 

Circuit Card Description and Installation

Page 165
Image 165
Nortel Networks 553-3001-211 manual Power requirements, Foreign and surge voltage protection, Ringer limitations