Codecs on SIP phones
| Yealink T31P | Grandstream GRP-2602P | Cisco SPA-303 | Linphone | |
| Versions | FW 124.86.0.40 HW 123.1.1.0.2.0.0 |
|
Software Versions: 7.4.9c, 7.5.2 Hardware Version: 1.0.1 |
Android 9+: v6.2.3 (7 Jul 2026) |
| in order of priority |
Opus G722 PCMA PCMU
legacy:
G729AB G729
G726/40 kbps G726/32 kbps G726/24 kbps G726/16 kbps
iLBC/15.2 kbps iLBC/13.3 kbps
G723.1/63 kbps G723.1/53 kbps
|
Opus G722 PCMA PCMU
legacy:
G.729A/B
G.726-40 kbps G.726-32 kbps G.726-24 kbps G.726-16 kbps
iLBC
G.723.1 kbps |
not supported: Opus 1) G722 G711u G711a
legacy:
2) G729a
3) G726-40 G726-32 G726-24 G726-16 not supported: iLBC
not supported: G.723
|
Opus/48 kHz G722/8 kHz PCMU/8 kHz PCMA/8 kHz
legacy:
G729/8 kHz
not supported: G.726
iLBC/8 kHz
not supported: G.723
other codecs enabled: L16/44.1 kHz speex/32kHz speex/16 kHz iSAC/16 kHz BV16/8 kHz GSM/8 kHz
(priority order can not be defined in the admin UI) |
| Config variables |
Use Pref Codec Only: no G729a Enable: yes G722 Enable: yes G726-16 Enable: no G726-24 Enable: no G726-32 Enable: no G726-40 Enable: yes Release Unused Codec: no Use Remote Pref Codec: yes Codec Negotiation: list all |
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