Nortel Networks Mediant TP-1610 SIP - Manual (Page 45)

Mediant 2000 SIP User’s Manual 5. Web Management
Version 4.4 45 July 2005
5.8.2 Advanced Parameters
Use this submenu to configure the following gateway’s advanced control protocol parameters.
• Disconnect and Answer Supervision
• CDR and Debug
• Miscellaneous Parameters
• Supplementary Services
5.8.3 Number Manipulation Tables
The VoIP gateway provides four Number Manipulation tables for incoming and outgoing calls.
These tables are used to modify the destination and source telephone numbers so that the calls
can be routed correctly.
The Manipulation Tables are:
• Destination Phone Number Manipulation Table for IP Tel calls
• Destination Phone Number Manipulation Table for Tel IP call
• Source Phone Number Manipulation Table for IP Tel calls
• Source Phone Number Manipulation Table for Tel IP calls
Note: Number manipulation can be performed either before or after a routing
decision is made. For example, you can route a call to a specific trunk group
according to its original number, and then you can remove/add a prefix to that
number before it is routed. To control when number manipulation is done, set
the ‘RouteModeIP2Tel’ and the ‘RouteModeTel2IP’ parameters. For
information on these parameters, refer to
Table 6-5 on page 115 .
Possible uses for number manipulation can be as follows:
• To strip/add dialing plan digits from/to the number. For example, a user could dial 9 in front
of each number to indicate an external line. This number (9) can be removed here before
(after) the call is setup.
• Assignment of NPI/TON to IP Tel calls. The VoIP gateway can use a single global setting
for NPI/TON classification or it can use the setting in this table on a call by call basis. Control
for this is done using “Protocol Management>Protocol Definition>Destination/Source
Number Encoding Type”.
• Allow / disallow Caller ID information to be sent according to destination / source prefixes.
To configure the Number Manipulation tables, take these 5 steps:
1. Open the Number Manipulation screen you want to configure (Protocol Management menu
> Manipulation Tables submenu); the relevant Manipulation table screen is displayed.
Figure 5-4 shows the ‘Source Phone Number Manipulation Table for Tel IP calls’.