Nortel Communication Server 1000 Manual page 38

38 Hardware requirements
Group G and earlier
Standard address mode (0-15) can be any of the following:
•
DPNSS1 (DDSL)
•
DASS2 (DDSL)
•
APNSS (LSSL)
•
Q.931 (DCHI)
•
ISL (DCHI)
•
SDI
•
ESDI
Expanded address mode (0-159) can be either of the following:
•
DPNSS1 (DDSL)
•
DASS2 (DDSL)
The expanded mode addressing has no impact on the standard mode
addressing, that is, DASS2 D-channel (DDSL) 7 in the expanded mode
can exist with the Q.931 D-channel (DCHI) 7 in the standard mode.
Theoretically, it is possible to have 160 DASS2 D-channels and 16 other
I/O devices. In practise, however, there is a limit of 40 addresses in
expanded mode and 16 in standard mode, for a total of 56 addresses.
The port address numbers assigned to the NT5K75 and NT6D11AE/AF
operating in expanded mode must not conflict with addresses assigned to
other I/O port types. To avoid potential conflicts and to simplify system
configuration, it is recommended that, in the expanded mode, the port
addresses for the NT5K75 and NT6D11AE/AF avoid the standard mode
range (0-15) and be numbered in the range 16-159 instead.
Group H and later
Standard address mode (0-15) can be any of the following:
•
DPNSS1 (DDSL)
•
DASS2 (DDSL)
•
APNSS (LSSL)
•
Q.931 (DCHI)
•
ISL (DCHI)
•
SDI
•
ESDI
Nortel Communication Server 1000
DASS2 Fundamentals
NN43001-571 04.01 4 June 2010
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