Nortel Networks Circuit Card - Manual (Page 203)

NT5D11 and NT5D14 Lineside T1 Interface cards Page 203 of 906
Circuit Card Description and Installation
Power requirements
The lineside T1 card requires +15 V, –15 V, and +5 V from the backplane.
One NT8D06 IPE Power Supply AC or NT6D40 IPE Power Supply DC can
supply power to a maximum of eight lineside T1 cards. See Table 78.
Foreign and surge voltage protections
In-circuit protection against power line crosses or lightning is not provided on
the lineside T1 card. It does 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 Channel Service Unit (CSU) as part of the
terminal equipment to provide external line protection.
Table 78
Lineside T1 card – power required
Voltage Current (max.)
+ 5.0 V dc 1.6 Amp
+15.0 V dc 150 mA.
–15.0 V dc 150 mA.