Nortel NT1R20 Description page 167

Environmental specifications
Table 34
Line-side E1 card—environmental specifications
Parameter
Operating temperature - normal
Operating temperature - short term
Operating humidity - normal
Operating humidity - short term
Storage temperature
Storage humidity
NT5D33 and NTRB34 Line-side E1 Interface Cards
When the card is used to service off-premise terminal equipment through the
public telephone network, install a Line Termination Unit (LTU) as part of
your terminal equipment to provide external line protection.
Table 34 shows the environmental specifications of the LEI.
Specifications
15° to +30° C (+59° to 86° F), ambient
10° to +45° C (+50 to 113° F), ambient
20% to 55% RH (non-condensing)
20% to 80% RH (non condensing)
-50° to + 70° C (-58° to 158° F), ambient
5% to 95% RH (non-condensing)
Page 143 of 290
Line cards Description