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The following chart details all codecs supported by all Sangoma Transcoding hardware:

The easiest way to install FreePBX is to download the FreePBX Distro from the download page. For step by step instructions to install the FreePBX distro, click on this link: Installing the FreePBX Distro. For information on the release versions and how to upgrade the FreePBX Distro read Upgrading the FreePBX Distro. Hi, Is there some way to install g729 codec in freepbx for free, in order to 'try' it like is provided for asterisk? Best Regards, Fernando FreeSWITCH-users mailing.

The Chart below indicates Asterisk & FreeSWITCH supported Codecs

Codec	G711 ulaw	G711 alaw	L16 Linear	G729ab	G723.1	G722	GSM_FR	ILBC	G726	AMR-NB	AMR-WB	G722.1	GSM_EFR
Asterisk	Y	Y	Y	Y	Y	Y	Y	Y	Y	N	N	N	N
FreeSWITCH	Y	Y	Y	Y	Y	Y	Y	Y	Y	N	N	Y	N

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Legend: Y - Supported codec
N - Unsupported codec

-> Asterisk: P time(s) are hard-coded at 20ms and cannot be changed
->FreeSWITCH: P time(s) up to and including 50 ms are supported

API Supported Codecs and Ptimes (not relevant for Asterisk/FreeSWITCH users)

Codec	P time (ms)	Codec	P time (ms)
G711 ulaw	10,20,30,40,50ms (64 kbps/8 Khz)	G722	10,20,30,40ms (64 kbps/8 khz)
G711 alaw	10,20,30,40,50ms (64 kbps/8 Khz)	GSM_FR	20 ms (13 kbps/8Khz)
L16 linear	10,20,30,40,50ms (128 kbps/8Khz) 10,20,30,40,50ms (256 kbps/16Khz)	GSM_EFR	20ms
G729 AB	10-200ms (8 kbps/8 Khz)	ILBC	20,40,60ms (15.2kbps/8Khz) 30,60ms (13.3kbps/8Khz)
G723.1	30,60,90ms (5.3kbps/8Khz) 30,60,90ms (6.3kbps/8khz)	G726	10,20,30,40,50ms (32kbps/8Khz)
G722.1 (Siren 7)	20ms (24kbps/16Khz) 20ms (32kbps/16Khz)	AMR	20,40ms (4.75kbps/8Khz) 20,40ms (5.15kbps/8Khz) 20,40ms (5.90kbps/8Khz)

*Note: The above Codec Support is based on the hardware (independent on the application above)

Note: Using the AMR-WB resource in connection with a Sangoma SBC or Sangoma Transcoding Boards described herein does not grant the right to practice the AMR-WB standard. To seek a patent license agreement to practice the standard, contact VoiceAge Corporation at www.voiceage.com/licensing.php.

Asterisk Codec Configuration

The Sangoma transcoder will perform transcoding for all codecs listed in the codec module configuration file: sangoma_codec.conf.
By default, the codec module is already pre-configured to perform all codec translations for G729. If you require only g729 translations you do not need to edit any information.

If you require the transcoder to perform transcoding for additional codecs, edit sangoma_codec.conf and add the translation with the following syntax:

-> register=XX Where 'XX' represents the codec of your choice (ie. register=pcmu)

*List all codes in a single register= line separated by commas. Eg -> register=g729toulaw,ulawtog729

If only one codec is specified in the command above, then all possible translation combinations for that codec will be registered. For example 'pcmu' , (pcmu->alaw, alaw->pcmu, g723->pcmu, pcmu->g723, gsm->pcmu, pcmu->gsm…etc)

If you register specific translation paths, (i.e g729toulaw, ulawtog729), then the codecs will be invoked for only those translations combinations, and no other.

If you wish to NOT register a codec or translation, edit sangoma_codec.conf and add the translation with the following syntax:

-> noregister=XX Where 'XX' represents the codec of your choice ie. pcmu

*List all codes in a single noregister= line separated by commas. Eg -> noregister=alaw,g723.1

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Asterisk supported codecs with their syntax in sangoma_codec.conf

Codec	register=
G711 ulaw	pcmu
G711 alaw	pcma
L16 Linear	slin
G729AB	g729
G723.1	g723.1
G722	g722
GSM_FR	gsm
ILBC	ilbc
G726	g726

sample sangoma_codec.conf file with various codec usages:

-> After editing your codecs in sangoma_codecs.conf, you must either restart Asterisk, or reload the codec module in asterisk ('module reload codec_sangoma.so')

Type 'sangoma show codecs' at the Asterisk CLI for a list of supported codecs

Type 'sangoma show translators' at the Asterisk CLI for the list of translators registered

FreeSWITCH Codec Configuration

The Sangoma transcoder will perform transcoding for all codecs listed in the codec module configuration file: sangoma_codec.conf.xml
By default, the codec module is already pre-configured to perform all codec translations for G729. If you require only g729 translations you do not need to edit any information.

If you require the transcoder to perform transcoding for additional codecs, edit sangoma_codec.conf.xmland add the translation with the following syntax:

-> <param name='register' value='X'/> Where 'X' represents the codec of your choice (ie. <param name='register' value='g729'/>)

If you wish to NOT register a codec or translation, edit sangoma_codec.conf and add the translation with the following syntax:

-> <param name='noregister' value='X'/> Where 'X' represents the codec of your choice ie. pcmu

FreeSWITCH supported codecs with their syntax in sangoma_codec.conf.xml

Codec	register=
G711 ulaw	pcmu
G711 alaw	pcma
L16 Linear	slin
G729AB	g729
G723.1	g723
G722.1	g7221
g722	g722
GSM_FR	gsm
ILBC	ilbc
G726	g726-32

sample sangoma_codec.conf.xml file with various codec usages:

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-> Type 'show codecs' in FS CLI and all codecs prefixed with 'sangoma' are registered by the transcoder

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-> Type ' sangoma_codec sessions' in FS CLI to see codec session with RTP information