Nortel Communication Server 1000 Manual page 26

26 Overview
Figure 5
DASS2 typical numbering scheme
The PBXs are identified by node codes 8 and 9. In this example figure,
the Network Access Code is 5. To place a call to a remote extension, the
following digit fields must be dialed:
To make a local call the Network Access Code and node code part of the
number can be omitted.
Access to the PSTN via the node A DASS2 route is obtained by dialing
"9" followed by the required PSTN number. This applies to both nodes A
and B. However, ISDN numbers 5541xx and 5542xx are the PSTN DDI
numbers for extensions on nodes A and B respectively. The numbering
plan ensures that calls to these numbers originated from within the private
network are not routed via the DASS2 route (and thus do not incur call
charges).
Network Access Code (5) + node code (8) + DN (4000 - the desired
extension at the remote node.)
Nortel Communication Server 1000
DASS2 Fundamentals
NN43001-571 04.01 4 June 2010
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