Nortel 1000 Installation And Commissioning Manual page 39

Unit 1 Clk Connectors
Two RJ11 connectors for connecting:
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•
Connector J5 (TRK)
A 9 pin D-Type connector used to connect:
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Connector J6 (DCH)
A 26-pin D-type connector is used to connect the DDP2 card to the external
MSDL or D-channel handler.
System capacity and performance
Physical capacity
Each NT5D97 DDP2 card occupies one slot on the network shelf. Each card
supports two digital trunk circuits and two network loops. The total number
of DDP2 cards per system is limited by the number of network loops,
physical capacity of the shelf, number of DTI2/PRI2 interfaces allowed by
the software and the range of DCH addresses.
D-Channel capacity
The software configuration for the NTBK51AA DDCH is similar to the MSDL
and only supports D-channel functionality.
The system has a total capacity of 16 addresses (Device Addresses or
DNUM) that can be reserved for DCH card, MSDL card or DDCH card. One
exception is DNUM 0 which is commonly assigned to the TTY terminal.
No two different D-Channel providers can share the same DNUM. Hence,
the combined maximum number of DCH, MSDL and DDCH cards in the
system is 16.
The DCH has one D-Channel unit, the DDCH has two D-Channel units,
and the MSDL has a maximum of four units. Therefore, the total number
of D-Channel is derived by the following formula:
Total_Num_DCH-Units = Num_DCHx1 + Num_DDCHx2 + Num_MSDLx4
Therefore, Total_Num_DCH-Units in any given system is between 0-63.
Copyright © 2003-2007, Nortel Networks
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Digital trunk unit 1 recovered clock to primary or secondary reference
source on clock controller card 0.
Digital trunk unit 1 recovered clock to primary or secondary reference
source on clock controller card 1.
Digital trunk unit 0 receive and transmit Tip / Ring pairs
Digital trunk unit 1 receive and transmit Tip / Ring pairs
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
NT5D97 Dual-port DTI2/PRI2 card 39