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Customize Your Voice Quality

How to Choose Your Preferred Codec for Each Extension
Take control of your voice quality by using the online 8x8 Account Manager to set your voice quality preferences extension by extension. By default, your extensions are set for compressed toll quality to conserve bandwidth. But you can select from the following options to meet your business needs:
  • Compressed Toll Quality (G.729) – Conserves Internet bandwidth and provides acceptable voice quality
  • Toll Quality (G.711) – Designed for toll quality without voice compression
  • HD Voice (G.722)  – Designed for high fidelity voice and best sound quality
It is important to note that your codec selection is a preference, not an absolute setting. The final determination of which codec is used is determined by the receiving party. For example, if your extension codec is set to Compressed Toll Quality (G.729) and the receiving party only accepts calls at Toll Quality (G.711), the call will go through at Toll Quality (G.711). 

However, there is still a great advantage to setting your codec preference. For example:
  • Keeping it at Compressed Toll Quality (G.729) ensures that your calls will save bandwidth whenever possible. 
  • Setting it for Toll Quality (G.711) means you will always attempt to connect your calls with toll-quality voice 
  • Setting it at HD Voice (G.722) means you can have lifelike conversations over your IP phone with other extensions that are set to HD Voice (G.722). 

More About Codecs

Codecs are an algorithm designed to compress and decompress audio for improved data transmission. 

Compressed Toll Quality G.729
  • Bandwidth: 30 Kbps upload and 30 Kbps download
  • Designed to conserve network bandwidth with slight decrease in voice quality
  • Extensions are set at G.729 by default
  • Compatible with all 8x8 devices except Virtual Office Mobile, KIRK cordless phone and 8x8 Softphone; calls over these devices will automatically use the G.711 codec.
Toll Quality G.711
  • Bandwidth: 90 Kbps upload and 90 Kbps download
  • Designed for toll quality without any voice compression
  • Compatible with all 8x8 devices including Virtual Office Mobile and 8x8 Softphone
High Definition G.722
  • Bandwidth: 90 Kbps upload and 90 Kbps download
  • Designed for high fidelity voice and best sound quality
  • For HD calls, both parties must be 8x8 customers on IP phones with extensions set to the G.722 codec
  • Compatible with all 8x8 devices except Virtual Office Mobile, KIRK Cordless phone, 8x8 Softphone, Cisco SPA122 ATA, Softalk Office and PSTN (traditional telephone service); calls over these devices will automatically use the G.711 codec. The codec for the Cisco SPA122 ATA is G.711 or G.729 as determined by the receiving party.

Changing Codec Settings

The phone system administrator can update codec settings under an individual extension or under Edit Multiple Extensions.

To edit an individual extension, login to the Account Manager, select Phone System and click on View All Extensions. Select Edit next to the extension you wish to edit. Under Extension Information, choose the codec you prefer from the drop down menu and click Save.
Select preferred codec











For  tips on using the online 8x8 Account Manager, watch our overview video.

For more helpful articles, visit our Hints and Tips page>.