Standard PRI cards, NT8D72 faceplate | Nortel Networks NN43001-301

NT8D72 PRI2 25

NTBK51 Downloadable D-Channel Daughterboard

The NTBK51 is a two port Downloadable D-Channel Daughterboard (DDCH) that has been introduced as an option to the NT6D80 MSDL, the NT5D97 dual-port DTI2/PRI2 card, or the NT5D12 dual-port 1.5 Mb DTI/PRI card.

The NTBK51 supports all the features of the existing 4 port MSDL (NT6D80), and eliminates the need for an external DCH card and associated cables for MSDL applications. The NTBK51 can support a maximum of 32 (16*2) MSDL type D-Channels per system, unlike the MSDL which can support a maximum of 64.

Note 1: Only one version, the NTBK51AA, can be used with the NT5D97, or the NT5D12. The NTBK51BA version has only 30+30 pin connectors (instead of 40+30 pins in the AA version). The missing 10 pins in the BA version prohibits the use of port 0 on the NT5D97, or NT5D12 card.

Note 2: The software allocation for NTBK51AA DDCH is similar to the MSDL. It is both physical and logical, and supports D-Channel functionality only.

Note 3: Port 0 has to be an even loop on the DDP2, and Port 1 has to be an odd loop. Port 2 and Port 3 should not be conﬁgured.

The connection between the dual-port cards and the DDCH daughterboard is made using two headers: one 30 pin and one 40 pin connector.

Standard PRI cards

This section provides a description of the standard ISDN PRI cards, namely the NT8D72 (AB/BA) PRI2 card, and the QPC720 1.5 Mb PRI card.

NT8D72 PRI2

Power requirements

The NT8D72AB and NT8D72BA PRI use power and ground connections from the backplane. Power requirements are:

+5 volts at 4 amperes

+12 volts at 50 milliamperes -12 volts at 50 milliamperes

NT8D72 faceplate

The NT8D72 contains ﬁve LEDs and six external connectors. Figure 5 "NT8D72 PRI faceplate layout" (page 26) shows the faceplate layout.

Nortel Communication Server 1000

ISDN Primary Rate Interface Installation and Commissioning

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

Nortel Networks NN43001-301 manual NTBK51 Downloadable D-Channel Daughterboard, Standard PRI cards

Models: NN43001-301