Nortel Networks NN43001-301 - Manual (Page 21)

QPC757 DCH 21
Figure 2
NT6D11 DCH faceplate layout
QPC757 DCH
Power requirements
The power requirements for the QPC757 DCH are:
• +5 volts at 3 amperes
• +12 volts at 50 milliamperes
• –12 volts at 50 milliamperes
DCH/PRI interface
The QPC757 DCH connects to the QPC720 PRI via a RS-422 cable. The
following signals are transmitted across the interface:
• RCV DATA
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
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