Remote IAX phones - Networking issue?

eNoisy

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#1
Hi there!

I’m really struggling with some networking concepts at the moment and was hoping someone could indicate me what’s the correct configuration i need. I also hope I’m posting this question in the right place.

I have two IAX phones on one location (same LAN and connect to the Internet through same modem/router – D-link ADSL ). I need to connect them to a remote Elastix server on a datacentre and even when I managed to do it, they keep disconnecting every now and then and I can’t just reconnect them.

I replaced the modem earlier today as I couldn’t re-connect one phone. Both phones worked fineand called each other, until now that I just checked and surprisingly one of them is not working again! And why is the EXT1 connecting on port 1024?

EXT1 Phone’sExternalIP (D) 255.255.255.255 1024 OK (22 ms)
EXT0 (Unspecified) (D) 255.255.255.255 0 UNKNOWN

This is my configuration for the devices:
Phone 1 (EXT0):
10.0.0.201
Local port: 4569
Server Port: 4569

Phone 2 (EXT1):
10.0.0.211
Local port: 4570 (I’ve had the same problem if i leave it on 4569)
Server Port: 4569

Modem port forwarding:
4569 – 10.0.0.201 – 4569
4570 – 10.0.0.211 – 4570

Firewall (Elastix side)
4569 forwarded to the Elastix machine

TIA
Juan
 

fmvillares

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#2
try to have faster registry times for example 5 minutes...
as iax uses udp cheap routers could not mantain sometimes the udp table connections in place .... another issue un 4570 iax is not working so if you have a phone pointing to 4570 iax ports will not work ...you could have 100 phones open to internet on 4569 as the nat router will derive to the correct port...iax2 does not need nat treatment at all because the inside of your lan is beginning the conversation and thus creating the connection in & out
 

eNoisy

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#3
Gracias! ;)

So basically I can remove the port forwarding I've set up in the modem router.
Where abouts do I need to change this registry value?

Thanks!
 

fmvillares

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#4
iax advanced setting in tool section of freepbx 2,7 & above
you need only to forward the serevr side ports if behind nat not the phones
 

eNoisy

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#5
Thanks for your reply!

Unfortunately it didn't help with my issue. I'm surethere is something wrong with the phone as the problem gets usually solved straight away when i reboot the phone, which by the way is a Fanvil BW320
 

fmvillares

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#6
ok then there you have the problem as those phones are centrality pa1688 chip based or in other words merely chinese crap for students only...
 

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