AltiGen MAXCS 7.0 Update 1 ACM Administration - Manual (Page 225)

Setting an IP Extension
MaxCS 7.5 Administration Manual 209
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.
Also see HMCP Codec Preference on page 132 for a discussion of the Codec Preference feature.
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.
For Remote IP Phone Deployment
If you do not enter the remote IP phone's IP address into the IP Codec table, the system will use the Default
(Prefer G.723.1 support G.729) setting. You can change the Default to Prefer G.729 support G.723.1, if
desired.
To set up the VoIP codec and define IP address ranges, see Setting VoIP Codec Profiles on page 311 and
Assigning Codec Profiles to IP Addresses
on page 317.
Setting Fax-Over-IP for an IP Extension
MaxCS 7.5 supports T.38 Pass-through on systems using AltiGen SIP trunks.
T.38 is a standard protocol for real-time fax transmission over IP networks. T.38 Pass-through relays two T.38
sessions between the SIP trunk and MAXCS and MAXCS gateway.
• T.38 pass-through is supported only on Softswitch and MAXCS Cloud
• T.38 pass-through is supported only on systems using AltiGen SIP trunks
For FoIP configuration instructions, read Chapter 29, starting on page 367.