Nortel Networks NN43001-301 manual NT5D12 Cable requirements

NT5D12 Dual-port DTI/PRI 65

CPU capacity

Using a NT512 DDP card instead of DTI/PRI cards does not increase the load on the system CPU. The DDP replaces an ENET card and two DTI/PRI cards, it emulates the ENET card and the overall CPU capacity is not impacted by usage of DDP card instead of a DTI/PRI card.

Power requirements

Table 17 "DDP power requirements" (page 65) lists the power requirements for the DDP card.

Table 17

DDP power requirements

Voltage	Source	Current
		DDP (without	DDP (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 DDP card supports all current QPC720 testing and maintenance functions through the following procedures:

•Self test upon power up or reset;

•Signaling test performed in the LD 30;

•Loopback tests, self tests, and continuity tests performed by LD 60 and LD 45;

•The D-Channel (MSDL, DCHI, DDCH) maintenance is supported by LD 96.

NT5D12 Cable requirements

This section lists the types of cable used and the lengths required for internal and external NT5D12 DDP connections.

Note 1: No additional cabling is required for nB+D configurations. Multiple DDPs and the D-channel are associated through software in LD 17.

Note 2: A detailed discussion of each type of DDP cable listed below follows.

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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