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Knowledge Base > Accessories > I/O Expansion Cards > 2 Line VoIP Interface Card

Which Codecs are supported by the Symetrix VoIP card?

G.722, G.711 (A-law and μ-Law), G.729 (including Annex B) and G.723.1. Note that G.729 Annex B is currently supported for received audio only, the full implementation of VAD for all codecs will be in a future release.

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