Nortel Communication Server 1000 Manual page 91

•
Connector J5 (TRK)
A 9 pin D-Type connector used to connect:
•
•
Connector J6 (DCH)
A 26 pin D-type connector is used to connect the DDP2 card to the external
D-channel handler.
System capacity and performance
Physical capacity
Each NT5D97AD 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 NTAG54 DDCH supports D-channel
functionality only.
The system has a total capacity of 16 addresses (Device Addresses or
DNUM) that can be reserved for DCH 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, and DDCH cards in the system
is 16.
The DCH has one D-Channel unit, the DDCH has two D-Channel units.
Therefore, the total number of D-Channels in a system is derived by the
following formula:
Total_Num_DCH-Units = Num_DCHx1 + Num_DDCHx2
Therefore, Total_Num_DCH-Units in any given system is between 0-63.
CPU capacity
Using a NT5D97AD 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.
Copyright © 2007, Nortel Networks
.
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
DASS2 Fundamentals
NN43001-571 02.01 Standard
Release 5.5 7 December 2007
NT5D97AD Dual-port DTI2/PRI2 card 91