Nortel Networks NN43001-301 manual CPU capacity, Testability and diagnostics, Without

40ISDN Primary 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		DDP2
		(without		(with
		NTBK51AA)		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 performed 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

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