Nortel VoIP Gateway, Configuration Manual

Page: 176 / 220

176 Business Communications Manager
P0606298 02
If no gatekeeper is used:
• Set Call Signaling to Direct.
If a gatekeeper is used.
• Set Call Signaling to Gatekeeper Routed if the gatekeeper is involved in handling all H.225
messages (for traffic control, billing or similar).
• Set Call Signaling to Gatekeeper Resolved if the gatekeeper is used only for address
resolution (see note above).
• Set the IP address of the Gatekeeper. This address is the same as the IP address configured on
the VoIP Gateway. Note that Business Communications Manager currently does not support
redundant gatekeepers as in the VoIP Gateway.
• Enter the Alias Names information. This information is used to setup the gatekeeper for the
dialing plan that is used by the Business Communications Manager, defining the digit prefix of
the numbers that are supported as well as classifying those digits as to their H.323 numbering
plan. This same classification must be used by VoIP Gateways when calling destination
numbers served by the Business Communications Manager. Number classification is done
using the Tel -> IP Destination Number Manipulation Table on the VoIP Gateway. Choices
for Alias Names are as follows:
Tel:<digits> Uses e.164 coding (dialedDigits)
PUB:<digits> Uses NPI / TON of Public Unknown
PRI:<digits> Uses NPI / TON or Private Unknown
UDP:<digits> Uses NPI / TON of Private Level 1 Regional
CDP:<digits> Uses NPI / TON of Private Local Number
NAME:<string> Uses H.323-ID which must be unique
• Leave the Time to Live parameter (TTL) set to 60 seconds.
• Leave the Gateway protocol set to none.
Media Parameters
To access the Media Parameters screen:
1
Click the Services key and click the IP Telephony key.
2 Click the IP Trunks key and click the H.323 Trunks key.
3
Click the Media Parameters tab.
Note:
This terminology is not consistent with H.323 standards. In H.323 standard
terminology, Gatekeeper direct means that the gatekeeper is used for ARQ (Address
resolution). This is called “Gatekeeper Resolved” on the Business Communications
Manager.