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No audio when call forward with Grandstream UCM

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Grandstream UCM without sound when forwarding call to an external number

If no audio stream in using of call forward with the UCM IP-PBX from Grandstream, then the setting RTP keep-alive may be required. The required setting can be found under PBX Settings – SIP Settings – ToS.

Grandstream UCM without sound when forwarding call to an external number

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One thought on “No audio when call forward with Grandstream UCM”

  1. I was litteraly hitting my head on the wall with this one. Didn’t find the information on either GS’s forum or their own documentation. Thanks again!

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