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Do I need inbound firewall rules when I use a Cloud solution of 3CX?

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Helpdesk Avelco

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Hello,

We have deployed a VoIP solution with 3CX in the cloud but the customer says the conversations are not that good. Sometimes they can't hear external phone calls, sometimes they don't receive a call and sometimes the calls are perfect..

We have tried almost everything network based (all the hardware is new and VoIP has an different networkk) but I don't have the knowledge about 3CX..

They use 6 phones right now with STUN.
 
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Hello,

We have deployed a VoIP solution with 3CX in the cloud but the customer says the conversations are not that good. Sometimes they can't hear external phone calls, sometimes they don't receive a call and sometimes the calls are perfect..

How are the phones connecting, Stun, VPN, SBC? How many phones?
 
How are the phones connecting, Stun, VPN, SBC? How many phones?

They use about 6 phones right now, will be more if it works. The phones are using STUN
 
They use about 6 phones right now, will be more if it works. The phones are using STUN

If using STUN, you would have to open the inbound ports required for each phone. If you switch to the SBC, it is NAT capable and you shouldn't need to open any inbound ports.

--Tracy
 
Install the Raspberry PI SBC. Very easy to do and low cost, about $60 or so. It will hiccup occasionally, but works much better then Stun.

Stun will continue to cause issues without a lot of extra work on the firewall and port settings on the server.
 
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We have decided to deploy an on premise PBX, do we still need a SBC to get a perfect VoIP solution?
 
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