List of VOIP phone and their codecs

This table is from http://www.ozvoip.com/voip-codecs/devices/

Client	Supported Codecs
Billion BIPAC 7402VL	G.711, G.729
Billion BIPAC-7100SV	G.711, G.729
Billion BIPAC7402VGP	G.711, G.729
Cisco 7960	G.711, G.729
Draytek Vigor 2100V(G)	G.711, G.723.1, G.726, G.729
Draytek Vigor 2500V	G.711, G.729
Draytek Vigor 2600V(G)	G.711, G.723.1, G.726, G.729
Draytek Vigor 2900V(G)	G.711, G.723.1, G.726, G.729
eyeBeam	GSM, iLBC, G.711, G.722, G.723.1, G.729, Speex
Grandstream BudgeTone 101	iLBC, G.711, G.723.1, G.726, G.728, G.729
Grandstream BudgeTone 102	iLBC, G.711, G.723.1, G.726, G.728, G.729
Grandstream GXP2000	GSM, G.711, G.722, G.723.1, G.726, G.728, G.729
Grandstream HandyTone 286	iLBC, G.711, G.723.1, G.726, G.728, G.729
Grandstream Handytone 486	iLBC, G.711, G.723.1, G.726, G.728, G.729
Leadtek 8051	G.711, G.723.1, G.726, G.729
Linksys PAP2	G.711, G.723.1, G.726, G.729
Linksys RT31P2	G.711, G.723.1, G.726, G.729
Linksys WRT54GP2	G.711, G.729
MS Office Communicator	GSM, G.711, G.722, G.723.1, DVI4, Siren
Octtel SPxxxx Series Gateways	G.711, G.729
Polycom SoundPoint IP300	G.711, G.729
Polycom SoundPoint IP500	G.711, G.729
Polycom SoundPoint IP600	G.711, G.729
Siemens optiPoint 400 Family	G.723.1
Siemens optiPoint 410 Family	G.711, G.723.1
Siemens optiPoint 420 Family	G.711, G.722, G.723.1, G.729
Sipura SPA-2000	G.711, G.723.1, G.726, G.729
Sipura SPA-2100	G.711, G.723.1, G.726, G.729
Sipura SPA-3000	G.711, G.723.1, G.726, G.729
Sipura SPA-841	G.711, G.729
sipXphone	G.711
SJPhone (free version)	GSM, iLBC, G.711
Snom 190	GSM, G.711, G.722, G.723.1, G.726, G.729
Snom 320	GSM, G.711, G.722, G.723.1, G.726, G.729
Snom 360	GSM, G.711, G.722, G.723.1, G.726, G.729
SwissVoice IP 10S	iLBC, G.729
Uniden UIP-200	G.711, G.729
Windows Messenger	GSM, G.711, G.722, G.723.1, DVI4, Siren
X-lite	GSM, iLBC, G.711, Speex
X-Pro	GSM, iLBC, G.711, G.729, Speex
Zyxel Prestige 2000W	G.711, G.729
Zyxel Prestige 2002	G.711, G.729
Zyxel Prestige 2602HW(-L)	G.711, G.729