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Mitel Forums => Mitel MiVoice Business/MCD/3300 => Topic started by: Sube on April 28, 2018, 04:00:47 AM

Title: Revolabs FLX2 confirm unit
Post by: Sube on April 28, 2018, 04:00:47 AM

Hi all,

UCaaS solution for a customer with Revolabs SIP conference units. I can register them no worries but get one way speech.

External caller can hear, but the units cannot. This happens for internal caller as well!

Revolabs --> MBG --> MiVB

All ports are open. I've had a similar issue before for a Konftel unit where the STUN server needed adding...but I've tried this to no avail.

Any ideas would be great
Thank you

Title: Re: Revolabs FLX2 confirm unit
Post by: x-man on April 28, 2018, 05:44:57 AM

router/switch in the way with SIP-Alg turned on?

Title: Re: Revolabs FLX2 confirm unit
Post by: acejavelin on April 28, 2018, 08:35:26 AM

So no audio into the conference unit? That sounds like a local router issue, audio is making to the PBX but not getting back and it likely isn't a MBG issue. Look for SIP ALG, SIP "helper", or similar SIP options in the local firewall and toggle them the opposite way.

Title: Re: Revolabs FLX2 confirm unit
Post by: Sube100 on May 03, 2018, 10:51:48 AM

***RESOLVED***

There was a NAT traversal setting on the Revolab unit that needed disabling