Codec |
Bitrate (kbps) |
Notes |
| PCMU u-law g711u |
64 | High Quality / Bandwidth Default Codec in most ATAs |
| PCMA a-law g711a |
80-96 | High Quality / Bandwidth |
| g723 | 24-40 | |
| g729 | 8 | |
| g726 | 32 | |
| iLBC | 8 | |
| GSM | 13 | Default Zoiper Codec |
Note: If connecting with Zoiper resolves phone quality / dropping issues, then the issue may be related to low bandwidth / high intermittent ping. May want to try a different codec on the ATA.
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