AltiGen MAXCS 7.5 New Features Guide - Manual (Page 13)

MaxCS 7.5 New Features Guide Page 13 of 22
Codec Upgrades
As mentioned earlier, Release 7.5 offers more flexible codec preference settings than earlier releases.
Enterprise Manager converts your existing codec configuration to new 7.5 codec profile settings. Because of this,
after you upgrade to release 7.5, you should review the converted codec settings and adjust them as needed.
The following table details how codec profiles are converted during the upgrade process.
Original Codec Profile Converted MAXCS 7.5 Selected Codec Profile
G.711 Mu-Law G.711 Mu-Law
G.711 A-Law G.711 A-Law
Prefer G723.1 support G729 G723.1, G729
Prefer G729 support G723.1 G729, G723.1
Prefer G.711 Mu-Law support G.711 A-Law G.711 Mu-Law, G.711 A-Law
Prefer G.711 A-Law support G.711 Mu-Law G.711 A-Law, G.711 Mu-Law
Codec Preference (HCMP)
MAXCS 7.5 includes a new feature designed to help you reduce the CPU consumption that occurs are a result of
codec encoding and decoding. It allows you to indicate a codec preference (G.729 or G.711) for calls handled via a
SIP trunk. This approach eliminates the steps of encoding and decoding – packets are directly forwarded to the
endpoint.
The preference that you set must be supported by the SIP Trunk provider, and must be included in the codec
profile list for SIP Trunks.
While this feature is enabled, then the SIP device’s codec configuration in Enterprise Manager will be ignored.
Codec preference applies to HMCP only.
All SIP devices must support G.711 uLaw; if there are no common codecs on the device side, and then G.711 uLaw
will be used.
This codec preference applies to all SIP Trunk inbound calls and direct extension to SIP trunk outbound calls that
are initiated from a phone or dialed via a MAXCS client.
Fax-over IP overrides this setting; it will always use G.711.
Outbound calls initiated by the system (such as calls from the voicemail system or ONA may not use the preferred
codec.
To configure this feature,
1. Log into MAXCS Administrator with the superpassword. If you do not log in via the superpassword, the
feature will not be enabled.
2. Open the HMCP board configuration panel (double-click HMCP in the Boards window).
3. To enable the feature, check the box and specify which codec to use (G.729 or G.711 Mu-Law). Click Ok.