Voice codecs: Difference between revisions

Revision as of 16:26, 31 March 2014

TelcoBridges products support the following voice 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
- T.38

Wireline codecs
- 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 and40 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 and80 msec

The Codec denisty is comprised of two mode:

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

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

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

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

[1] May require additional licenses

@@ Line 31: / Line 31: @@
 === Codec density ===
+The Codec denisty is comprised of two mode:
+*Mixed Mode
+*Fixed Mode
 <br>
-==== Mixed mode ====
+==== Mixed Mode ====
-The following density can be achieve when codec mix is dynamically negotiated.
+The following densities are achieved when a codec mix is dynamically negotiated.
 {| cellpadding="5" border="1" class="wikitable" style="text-align: center"
 |-
@@ Line 117: / Line 120: @@
 ==== Fixed mode ====
-The following density can be achieve when codec mix is predefined.
+The following densities are achieved when a codec mix is predefined.
 {| cellpadding="5" border="1" class="wikitable"  style="text-align: center"
 |-