Nortel Networks 553-3001-211 manual Shows the environmental specifications of the LEI

Page 250 of 894 NT5D33 and NT5D34 Lineside E1 Interface cards

Power requirements

Table 89 shows the voltage and maximum current that the LEI requires from the backplane. One NT8D06 IPE Power Supply AC or NT6D40 IPE Supply DC can supply power to a maximum of eight LEIs.

Table 89

LEI card – power required

Voltage	Max. Current
5.0 V dc	1.6 Amp
+15.0 V dc	150 mA
-15.0 V dc	150 mA

Foreign and surge voltage protections

In-circuit protection against power line crosses or lightning strikes is not provided on the LEI. It does, however, have protection against accidental shorts to –52 V dc analog lines.

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 the terminal equipment to provide external line protection.

Environmental specifications

Table 90 shows the environmental specifications of the LEI.

Table 90

LEI card – environmental specifications (Part 1 of 2)

Parameter	Specifications
Operating temperature – normal	15° to +30° C (+59° to 86° F), ambient
Operating temperature – short term	10° to +45° C (+50 to 113° F), ambient
Operating humidity – normal	20% to 55% RH (non-condensing)
Operating humidity – short term	20% to 80% RH (non condensing)

553-3001-211 Standard 2.00 September 2004