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Remote office IAX trunk, over VPN or Internet?

garyv
Posts: 150
 Member Since:
2006-10-20
Submitted by garyv on Sat, 09/20/2008 - 2:02pm.

I’m getting ready to put in a server in a remote office. I have a VPN link from office to office. Office A has a PRI and most incoming and outgoing calls from Office B are going to go thru the PRI.

My question is, should I link the boxes using an IAX trunk over the internet or IAX trunk over the VPN? I would guess the VPN would be more secure but also cuts the bandwidth do to the overhead of maintaining the VPN. A straight IAX over the internet has more bandwidth but would not be as secure as the VPN I would think. I have made an IAX link over the internet before, using the encryption option, so that is another option.

What would you all recommend/use in a like situation?

Thanks for your time and input,
Gary V.

‹ TRIXBOX - /admin/config.php Errors -- Please Help *** Pulling My Hair Out*** IAX2 PBX to PBX trunk dropping when dynamic dns IP change. ›

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IcelandDreams
Posts: 415
 Member Since:
2007-09-11
I find that an IPSEC tunnel
Sat, 09/20/2008 - 3:02pm

I find that an IPSEC tunnel with compression to have more bandwidth for at least the usual traffic, not sure about IAX but it seems to work fine for me and I'd suspect that it gets some compression. You can find a nice tradeoff with security levels and speed depending on what your VPN devices are capable of. I just did one between a pfSense firewall and an RV082 over consumer grade cable modem (single voip extension plus interoffice traffic) and so far the quality is excellent.


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SkykingOH
Posts: 9538
 Member Since:
2007-12-17
It's so much the encryption
Sat, 09/20/2008 - 3:55pm

It's so much the encryption that the VPN buys you it's the fact you don't have to open any ports to the Internet.

I have some great tricks for forwarding DID's across IAX trunks from your main PRI.

I would also toss a few pots lines in the remote office for redundancy.

--

Scott

aka "Skyking"


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garyv
Posts: 150
 Member Since:
2006-10-20
Thanks to both. How do you
Sat, 09/20/2008 - 10:21pm

Thanks to both.

How do you push the dids across the IAX?

I'm going to have at least one pots for DSL/Fax/911, maybe more. But the goal is to cut the number of pots lines we have now. They have 5 lines now, and hope to get it down to one.

Anyways thanks.


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