Which device performs transcoding when endpoints use different codecs?

Which device performs transcoding when endpoints use different codecs?

• A. Transcoder
• B. Phone device
• C. G/W Media Termination Point
• D. Router

Answer: (A)

When endpoints speak different codecs, the media stream must be translated in real time so the two sides can understand each other. That job is done by a Transcoder, a device dedicated to codec translation. It decodes the incoming audio from one codec and re-encodes it into the other, handling timing and quality as the two endpoints share the call path. A phone device only uses its own codec and cannot translate to the other endpoint’s codec. A router mainly handles packet routing, not real-time codec conversion. A gateway/Media Termination Point can handle various media tasks, but the specific function of converting between codecs is performed by the Transcoder.

When endpoints speak different codecs, the media stream must be translated in real time so the two sides can understand each other. That job is done by a Transcoder, a device dedicated to codec translation. It decodes the incoming audio from one codec and re-encodes it into the other, handling timing and quality as the two endpoints share the call path. A phone device only uses its own codec and cannot translate to the other endpoint’s codec. A router mainly handles packet routing, not real-time codec conversion. A gateway/Media Termination Point can handle various media tasks, but the specific function of converting between codecs is performed by the Transcoder.