Administrator's Guide

Uniform Dial Plan
Issue 5 October 2002 1917555-233-506
If the AAR access code and 222-1234 are dialed, the system finds the route
pattern for RNX 222 and routes the call to the switch associated with that RNX.
Whenever UDP is used to route a call to another switch, the correct digit deletion
and insertion must be specified within the route pattern so that the receiving
switch gets digits in the format it expects. Avaya MultiVantage can be configured
in several different ways.
■ If AAR is available on the receiving switch, Subnet Trunking can be used
to insert the AAR feature access code on the originating switch or digit
insertion may be used to insert it on the receiving switch. The receiving
switch then uses AAR digit conversion to convert 222 with 7 digits to an
extension by deleting 3 digits and inserting a 6.
■ If AAR is not available on the receiving switch, Subnet Trunking must be
used on the originating switch to delete the 222 and insert the digit 6 at the
beginning of the extension number so that the receiving switch can
continue to route correctly.
If the user at extension 51234 on Switch C dials extension 61234, the call must
first go through Switch A before proceeding to Switch B. When 61234 is dialed,
the system recognizes 61 as a UDP code, determines the associated RNX (222),
and uses AAR to route the call. The AAR feature access code plus 222-1234 are
outpulsed to Switch A. Switch A then recognizes the RNX 222 as a remote switch
and routes the call to Switch B and extension 61234. This same type of call
routing occurs when an extension at Switch B calls an extension at Switch C.
If extension 61234 on Switch B calls extension 61235, the system recognizes 61
as a local UDP code and routes the call directly to extension 61235.
Considerations
■ In North American network environments, extensions beginning with 0
may route to an attendant. You are encouraged to use another number as the
leading digit when assigning extensions.
■ When you call an extension on another switch, there may be a slight delay
before call-progress tones are applied. This delay is due to the trunk
signaling necessary to complete the call to the remote switch.
■ When you select the option to look at the UDP table first, calls that might
otherwise terminate at a local extension route over the network. This is
easily reversed. When you remove the extensions from the UDP table, the
local extension can be dialed again.