Nortel Networks NN43001-301 - Manual (Page 196)

196 1.5 Mb PRI implementation
Circuit card Description
NTAK20
Clock-controller daughterboard. Small Systems
supports only one active clock controller per system
or IP expansion cabinet.
Note: Every cabinet/Media Gateway that contains a
digital trunk must contain a clock controller.
NTAK93 D-channel-handler (DCH) interface daughterboard.
NTBK51BA Downloadable D-channel daughterboard (DDCH).
Connects to the NTAK09 DTI/PRI card.
Cables
The following cables are required for PRI connections:
• PRI to external T1 cable
• NTBK04 carrier cable
• NT8D97 50-foot extension (if needed)
Channel Service Units (CSU)
When connecting the DTI/PRI to the public network, CSUs are required by
most operating companies. One CSU is required per PRI. Suitable CSUs
which support 64 Kbps clear and Bipolar 8 Zero Substitution (B8ZS) are
available from vendors such as Verilink, Digitalink, Kentrox, and Tellabs.
Note: Contact your Nortel Sales representative for specific local CSU
requirements.
Hardware description
Media Gateway/Media Gateway Expansion
The Media Gateway and Media Gateway Expansion contain physical card
slots, numbered 1 to 10. When configuring the system, the physical card
slot numbers must be transposed to logical card slot numbers. For example,
to configure a card physically located in slot two of the Media Gateway one,
use logical slot 12. To configure a card physically located in slot two of the
Media Gateway two, use logical Slot 22.
Table 72 "Media Gateway and Media Gateway Expansion slot assignments"
(page 197)
maps physical card slot numbers to logical card numbers for the
Media Gateway and Media Gateway Expansion and reflects added support
for the Media Gateway and Media Gateway Expansion physical card slot 4.
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
.