Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

 NT1R20 Off-Premise Station Analog Line card

Table 66 shows the environmental specifications of the OPS analog line 
card.  

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. 

The operation of each unit is configured in software and implemented in the 
card through software download messages. When the NT1R20 OPS analog 
line card unit is idle, it provides a ground on the tip lead and –48 V dc on the 
ring lead. The on-hook telephone presents a high impedance toward the line 
interface unit on the card.

0 – 10 ohms

3

> 10 – 900 ohms

2

> 900 – 2300 ohms

1

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)