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Mitel MiVoice Business/MCD/3300 / 5610 Cordless Handset

« on: January 30, 2014, 04:25:11 PM »

I'm working with 2 5610 cordless handsets and the IPDECT stand. When the user places a call and the call is answered neither person can hear anything, however if they hang up and call right back the call goes through fine. We have 30+ Mitel phones and this problem only appears on the cordless phones. Mitel is trying to say is our Sophos UTM firewall, which is outright bull***Censored***, they want to replace our Sophos with a sonicwall, but we are refusing to let them.

Does anyone have any idea what could be causing this?