Glossary: Voice Codecs

TelcoBridges products support the following voice codecs.

Supported codecs

• Universal codecs

  • G.711 - Supported packet durations: 20,30,40,50 and 60 msec

  • G.723.1 - Supported packet durations: 30,60 and 90 msec

  • G.726 - Supported packet durations: 20,30,40,50 and 60 msec

  • G.729a/ab - Supported packet durations: 20,30,40,50,60,70 and 80 msec

  • Clearmode (rfc4040) - Supported packet durations: 5,10,20,30,40,50,60 msec

  • T.38

• Other codecs

  • G.722 - Supported packet durations: 5,10,20,30,40,50 and 60 msec

  • G.728 - Supported packet durations: 20,30,40,50 and 60 msec

  • G.729eg - Supported packet durations: 20,30,40,50,60,70 and 80 msec

  • iLBC - Supported packet durations: [13kbps] 30 and 60 msec, [15kpbs] 20 and 40 msec

• Wireless codecs 1

  • AMR - Supported packet durations: 20,40,60 and 80 msec

  • GSM-FR - Supported packet durations: 20 and 30 msec

  • GSM-EFR - Supported packet durations: 20,40 and 60 msec

  • EVRC - Supported packet durations: 20,40 and 60 msec

  • QCELP - Supported packet durations: 20,40 and 60 msec

  • G.722.2 (AMR-WB) - Supported packet durations: 20,40,60 and 80 msec

TMG media gateways codec capacity

Media Gateway	Universal codecs	Other codecs	Wireless codecs1
G.711	G.723.1	G.726	G.729ab	T.38	clearmode (rfc4040)	G.722	G.728	G.729eg	iLBC	AMR	AMR-WB	GSM-FR/GSM-EFR	EVRC/QCELP
TMG800-HR16	512	508	512	512	508	512	236	232	256	300	364	236	428	380
TMG3200-TE16 TMG7800-TE16	512	508	512	512	508	512	236	232	256	300	364	236	428	380
TMG3200-TE32 TMG7800-TE32	1024	1016	1024	1024	1016	1024	472	464	512	600	728	472	856	760
TMG3200-TE48 TMG7800-TE48	1536	1524	1536	1536	1524	1536	708	696	768	900	1092	708	1284	1140
TMG3200-TE64 TMG7800-TE64 TMG3200-STM1 TMG7800-STM1	2048	2032	2048	2048	2032	2048	944	928	1024	1200	1456	944	1712	1520

Tdev development platform

TMP6400 Codec density

Codec density is comprised of two modes:

• Mixed Mode

• Fixed Mode

Mixed Mode

The following densities are achieved when a codec mix is dynamically negotiated.

Type of VoIP mezzanine	Universal codecs	Other codecs	Wireless codecs1
G.711	G.723.1	G.726	G.729ab	T.38	G.722	G.728	G.729eg	iLBC	AMR	AMR-WB	GSM-FR/GSM-EFR	EVRC/QCELP
TM-VOIP-1	341	127	169	154	127	59	58	64	75	91	59	107	95
TM-VOIP-2	682	254	338	308	254	118	116	128	150	182	118	214	190
TM-VOIP-3	1023	381	507	462	381	177	174	192	225	273	177	321	285
TM-VOIP-4	1364	508	676	616	508	236	232	256	300	364	236	428	380

Fixed mode

The following densities are achieved when a codec mix is predefined.

Type of VoIP mezzanine	Universal codecs	Other codecs	Wireless codecs1
G.711	G.723.1	G.726	G.729ab	T.38	G.722	G.728	G.729eg	iLBC	AMR	AMR-WB	GSM-FR/GSM-EFR	EVRC/QCELP
TM-VOIP-1	404	128	200	168	128	60	66	72	84	102	60	120	96
TM-VOIP-2	808	256	400	336	256	120	132	144	168	204	120	240	192
TM-VOIP-3	1212	384	600	504	384	180	198	216	252	306	180	360	288
TM-VOIP-4	1616	512	800	672	512	240	264	288	336	408	240	480	384