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Chapter 16: Setting Up IP Extensions
230 AltiWare ACM 5.1 Administration Manual
chassis has a Gateway ID. You need to assign an IP extension to a gateway to be
able to use the resource in that gateway for activities such as the following:
• Access voice mail
• Initiate a conference call
• Record a conversation
• Barge in, listen, and coach by workgroup supervisor
This assignment allows the administrator to plan and populate sufficient VoIP
resources on a gateway chassis for a set of users that belong to this home gateway.
The VoIP resource planning guideline:
Total VoIP Channels = (Total PSTN Trunk Channels + Total WG Agents) x 1.2
5. Enable Fallback to Mobile Extension—When this option is checked, and the IP
phone loses its network connection, it will automatically fall back to a Mobile
Extension. The mobile extension channel must be specified from the drop-down list.
This feature is only available for an IP Extension with a dynamic IP address.
Losing network connection can happen in the following cases:
• The user presses #26 to log out from the IP phone
• The server loses connectivity to the IP phone
• The IP Extension's channel is taken over by another extension
• The user exits from an IP Talk session
Once associated with a fallback mobile extension, when the network connectivity is
restored, the fallback mobile extension stays active, and the user must re-register
the phone to reconnect to the server.
Setting VoIP Codec for IP Extension
The system has a pre-configured IP range and codec setting to assist IP phone
deployment.
In the AltiEnterprise Manager/Codec profile, two codec profiles are pre-configured:
• Default—Prefer G.723.1 support G.729
• G.711—G.711 with Jitter (10 ~ 60 ms), Packet Length 10 ms
In the AltiEnterprise Manager/Servers/IP Codecs setting, three local IP address ranges
are pre-configured to use the G.711 codec profile:
• 192.168.0.0 ~ 192.168.255.255
• 10.0.0.0 ~ 10.255.255.255
• 172.16.0.0 ~ 172.31.255.255
When an IP phone registers to an IP extension, the system will check the IP address to
determine which codec to use for the IP phone.
For local IP phone deployment
If your local IP address is not in the pre-configured range, you need to add the local IP
address range into the IP Codec setting. Otherwise the system will use the Default
(Prefer G.723.1 support G.729) setting for your IP extensions.