Video/Voice/Speech Codecs | Grandstream Networks

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• Video/Voice/Speech Codecs

Product Related Questions

• SoftwareUCM
• UCM6200/6510
• CloudUCM
• GCC60xx Series
• GSC3510/3505
• GVC3220
• GDMS Grandstream Device Management System
• IPVideoTalk Service
• UCM6300 Series IP PBX and Wave
• WP820 WiFi Cordless
• GVC3210
• GWN series
• GAC2500
• DP720/750Series
• HandyTone Series
• GXP Enterprise Phone Series

Common Questions

• Informational
• Firmware
• Video/Voice/Speech Codecs
• Custom Ringtone FAQ
• Common Configuration Questions
• Typical Service Provider Configurations
• Headset Compatibility

GNU General Public License

• GNU General Public License
• GNU GPL Information & Download

Interoperability

• Interoperability Questions
• Open Source Configuration

What codec should I use for my Grandstream phone?

PCMU (G711u) is used by default. Both PCMU and PCMA will give you toll quality but their bandwidth consumption is also the highest. If your network bandwidth is low, you can choose a lower-bit-rate codec such as G723 or G729 which will give you near toll quality at much smaller bandwidth consumption. If bandwidth is not a concern try using PCMU or PCMA, or even the wideband codec G722 which will provide hi-fidelity voice.

For example: If you have a basic high-speed connection at home (768kbps/128kbps), configure your phone with either G723 or G729 to ensure best available voice quality. If you have T1 bandwidth capacity, configure your phone with either G711 (a/µ) or G722 to experience toll-quality or high-fidelity voice.

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