Multiple VOIPo boxes behind NAT

[VOIPoDanielC]

With Grandstreams, you might want to enable symmetric RTP, enable STUN, and enable random port under the SIP settings.

Having more than 1 device behind a NAT is a VERY tricky situation.

For more information on what's going on because of SIP and NAT not playing well together, I would recommend reading: http://www.voip-info.org/wiki/view/NAT+and+VOIP

[chpalmer]

Having more than 1 device behind a NAT is a VERY tricky situation.

Actually we have done this quite easily for over 5 years. Pretty much plug-n-play.. 6 numbers behind an Actiontec modem/router combo at the office with no changes to the devices or router to make them work.

I think a better way to say it would be is that it could be a tricky situation under certain circumstances...

[VOIPoDanielC]

I think a better way to say it would be is that it could be a tricky situation under certain circumstances...

I think you're just lucky...

Extremely lucky.

More than 80% of the time people have more than 1 device behind NAT, they run into one way audio issues because the router doing the NAT doesn't know exactly how to handle the packets from other sources that the device isn't registered to.

[chpalmer]

Truthfully I think we only hear about the people that have trouble so seems that way.

Think of large corporations, school districts, fire departments, ect that have multiple locations and use ip phone systems. Ive seen many of these types of users with soho broadband routers in there "data closets".

With the right router heading up a network there should be no problem. But as stated here many times... Some routers try to do too much and cause problems.

One of the past providers for our office used separate servers for line one and two on the ata's. All ports were the same. Same port number for lines one and two. Think about that for a second... Same Linksys ATA's... Ive unlocked them now for our new provider...

[cfabe]

I logged two calls that had problems today:

Call Reference ID: CXC-177-6595f7f0-a9d5ed0-13c4-4c547ae2-3e6fd247-50270900@208.94.157.10 - this call rang but no audio when answered

Call Reference ID: 72709d69b7abc98b@24.180.168.134 - this call was connected normally and dropped after about 2 minutes.

Thanks for any advice.

[chpalmer]

Id recommend making firewall rules allowing Voipo's servers access to your network.

Ive got a feeling its your router software...

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• remote WinBox GUI and Web admin
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