SIP trunk over 4G

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pristle

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#195960 13-May-2016 14:06

Hi, relative noob (poster anyway) on GZ and apologise in advance if this has been covered elsewhere, I've looked and not been able to find it.

I'm seeking comment on experience with getting say a 2Talk Business Go or Enterprise plan fully functional under RBI 4G environment?

I have a client who based their land purchase on the expectation that they'd be 'in zone' for the recent UFB/RBI rollout. Turns out they're about a kilometre too far out. While copper ISDN is still an option for their voice side, the best data connection would be ADSL1 or 1Mb down and 128kb up. :(

Turns out they're 2.5km away from a 4G tower. Testing without an external antenna has revealed up/down speeds in excess of 40/25. Latency at around 18-25ms. I'd have thought this would make them a good candidate for a 4G/SIP option.

They have 10 users who currently chow through a mere 120Gb a month in data and at a push have 4 conversations over their existing ISDNs at any given time.

Comments?

Paul

coffeebaron

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#1552350 13-May-2016 19:03

Yes should be possible. Check out http://www.ultimatebroadband.co.nz/rbi-wireless.html
We can do public & static IP on RBI.

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chevrolux

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#1552426 13-May-2016 21:53

I'd first make sure whatever provider you go with gives you a public IP as the majority do cg-nat which will.just cause no end of issues with SIP.
Other than that I think it would be something you just have to test. Set up your PABX to make calls out on the sip trunks (with incoming still on the ISDN) and just see what the users think.
I would be concerned about the tower get a bit over loaded. I don't know how they (the mobile network) do things but I assume it would be no different to any packet switched network and packets would get queued and start affecting voice quality.
But overall, latency should be fairly low as long as the client router stays on 4G and doesn't fall back to 3G.