AudioCodes Mediant 500 E-SBC, User Manual

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User's Manual 39. Software Upgrade
Version 6.8 559 Mediant 500 E-SBC
39.1.4.3 Dial Plan Prefix Tags for Routing
39.1.4.3.1 Dial Plan Prefix Tags for IP-to-Tel Routing
For deployments requiring many IP-to-Tel routing rules that exceed the maximum number
of rules that can be configured in the Inbound IP Routing table, you can employ user-
defined string labels (tags) to represent the many different prefix calling (source) and called
(destination) numbers. The prefix tags are used in the Inbound IP Routing table (see
''Configuring Inbound IP Routing Table'' on page
394 ) as source and destination number
matching characteristics for the routing rule. Prefix tags are typically implemented when
you have calls of many different called or calling numbers that need to be routed to the
same destination. Thus, instead of configuring a routing rule for each prefix number, you
need to configure only one routing rule using the prefix tag.
For example, this feature is useful in deployments that need to handle hundreds of call
routing scenarios such as for a large geographical area (a state in the US). Such an area
could consist of hundreds of local area codes as well as codes for international calls. The
local calls and international calls would need to be routed to different SIP trunks. Thus,
instead of configuring many routing rules for each call destination type, you can simply
configure two routing rules, one with a unique prefix tag representing the different local
area codes and the other with a prefix tag representing international calls.
Note: When using prefix tags, you need to configure manipulation rules to remove the
tags before the device sends the calls to their destinations.
You configure prefix tags in the Dial Plan file, using the following syntax:
[ PLAN<index> ]
<prefix number>,0,<prefix tag>
where:

Index is the Dial Plan index

prefix number is the called or calling number prefix (ranges can be defined in
brackets)

prefix tag is the user-defined prefix tag of up to nine characters, representing the prefix
number
Each prefix tag type - called or calling - must be configured in a dedicated Dial Plan index
number. For example, Dial Plan 1 can be for called prefix tags and Dial Plan 2 for calling
prefix tags.
The example Dial Plan file below defines the prefix tags "LOCL"and "LONG" to represent
different called number prefixes for local and long distance calls:
[ PLAN1 ]
42520[3-5],0,LOCL
425207,0,LOCL
42529,0,LOCL
425200,0,LONG
425100,0,LONG
....
Note: Called and calling prefix tags can be used in the same routing rule.