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Mitel Forums => Mitel MiVoice Business/MCD/3300 => Topic started by: jonesng on September 06, 2021, 04:20:31 PM

Title: Call forwarding no audio either direction
Post by: jonesng on September 06, 2021, 04:20:31 PM

I have an issue with call forwarding, if anyone else has had similar issues, suggestions for a fix, or any ideas I would be grateful.

Our MBG is in DMZ mode, our PBX is a 3300 on the internal LAN.

Calls are OK incoming and outgoing
However call forwarding fails
E.G. If I forward my DDI to my mobile, then ring my DDI from an external number, the call is transferred to my mobile.  However when I answer there is no audio either side.

I understand this type of issue with no audio could be the result of NAT.  We have a Palo Alto firewall.  All firewall rules have been created as per BT guidelines for their SIP trunks with SIP ALG disabled.

Any assistance appreciated.

Thanks

Title: Re: Call forwarding no audio either direction
Post by: NEPhoneGuy on September 07, 2021, 08:21:03 AM

I'd check your media IPs - sounds like signaling here is happy but what ports and IPs is the RTP streaming from.