Server User's Manual

40 ISDN Primar y Rate Interface equipment overview
CPU capacity
Using a NT5D97 DDP2 card instead of DTI2/PRI2 cards does not increase
the load on the system CPU. The DDP2 replaces an ENET card and two
DTI2/PRI2 cards. Emulating the ENET card and the overall CPU capacity is
not impacted by using a DDP2 card instead of a DTI2/PRI2 card.
Power requirements
Table 8 "NT5D97 DDP2 power requirements" (page 40) lists the power
requirements for the NT5D97 DDP2 card.
Table 8
NT5D97 DDP2 power requirements
Voltage
Source Current
DDP2
(without
NTBK51AA)
DDP2
(with
NTBK51AA)
+5V Backplane 3A 3.8A
+12V Backplane 25mA 75mA
-12V Backplane 25mA 75mA
Total Power (Maximum) 15.6W 20.8W
Testability and diagnostics
The DDP2 card supports testing and maintenance functions through the
following procedures:
•
Self test upon power up or reset
•
Signalling test performed in the LD 30
•
Loopback tests, self tests, and continuity tests perfor med by LD 60
and LD 45
•
The D-Channel (DCH, MSDL, DDCH) maintenance is supported by
LD 96.
Note: The MSDL selftest is not applicable to the NTBK51AA D-Channel
daughterboard.
Cable requirements
This section lists the types of cable used and the lengths required for
internal and external NT5D97 DDP2 connections.
Note: No additional cabling is required for nB+D configurations. Multiple
DDP2 cards and the D-channel are associated through software in
LD 17.
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
Copyright © 2003-2007, Nortel Networks
.