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New Features in Release 2.4.1
6 RN-001029-03, Release 2.4.1, Rev 01
IP Phone Release Notes 2.4.1
Support for Additional Codec Types and Codec Priority Selection
Release 2.4.1 includes support for additional code types. Previously, using the Aastra Web UI or
the configuration files, an Administrator could enable or disable basic codecs for the phones
(G.711 u-law, G.711 a-law, and G.729), customize a codec preference list, and enable or disable
silence suppression.
Now using the Aastra Web UI or the configuration files, an Administrator can select from up to
14 codecs for the phones AND customize a codec preference list of up to 10 codecs. Silence
suppression can still be enable or disabled as required.
Configuring Customized Codecs Using the Configuration Files
Using the configuration files, you can enter the following parameters to configure the codecs for
the phones and customize a codec preference list.
• sip customized codec (this parameter has not changed but now supports up to 14 codecs)
User Interface Feature
Parameter –
sip customized codec
Codec Preference List
(in Web UI)
Aastra Web UI Advanced Settings->Global SIP->RTP Settings
Configuration Files aastra.cfg, <mac>.cfg
Description Specifies a customized Codec preference list which allows you to
select the preferred Codecs for this IP phone. You can enter up to 10
codec preferences.
Note: Enabling or disabling silence suppression (sil supp) enables/
disables it for all codecs in the customized list.
Format Comma-separated list of semicolon-separated values
Default Value Not Applicable
Range Valid values for the syntax are:
payload 0 - G711u/8000
8 - G711a/8000
98 - G726-16/8000
97 - G726-24/8000
115 - G726-32/8000
96 - G726-40/8000
18 - G729/8000
106 - BV16/8000
107 - BV32/16000
110 - G711u/16000
111 - G711a/16000
9 - G722/8000
113 - L16/16000
112 - L16/8000
ptime (in milliseconds) 5, 10, 15, 20........90
silsupp on, off
Note: The “silsupp” value is either ON for all codecs or OFF for all
codecs.
Example sip customized codec:
payload=18;ptime=10;silsupp=on,payload=0;ptime=10;
silsupp=on