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.
We are sorry that this post was not useful for you!
Let us improve this post!
Tell us how we can improve this post?