VOIP Problem

[rav_sk]

Hi all,
I am doing IP tunking of two sites with OXO.At the site A client is using static IP 210.214.14.90 & this static IP has been forwarded to local ip 192.168.1.246(OXO Ip address).
At site B,client is using static IP 59.177.181.78 & has been forwarded to 192.168.10.246(Ip address of OXO).I have configured the Router & unblocked voip ports 30021, 31000 to 31002, 443, 69, 80, 67, 68,69.
Now user from site B,can make call to site A,It is working.But when user from site A tries to make call to site B,it is not connected.User keeps hearing the RBT but call does not land anywhwere in system.
Any solution will be most welcomed ???
Regards,
Ravinder Singh

[vad]

Make a trace (f.e. with wireshark).
F.e. you send wrong digits (or in site B not declared users in private numbering plan). About "call does not land anywhwere in system" - may be General Bell (by default in 8 att group)? You can manage External line/ incoming call handling = release (I think you will have busy instead off RBT).

[rav_sk]

sir,
Thanks for your instant reply.Settings are ok,users have been defined in private numbering,If i check the counter for incoming voip calls,It shows no calls,only outgoing voip call are appearing in counter.How to check the trace with wireshark ?
Ravinder

[Konstantinos.E]

if you r not familiar with wireshard download OMC800 and when you connect to OXO inside tools run OSC.Select filters and make the trace.
Also check the codecs you use on both PBX inside ARS.

[tot3nkopf]

I am not sure that SIP will do 2 times NAT. Is your router SIP ALG aware? A better solution would be to use VPN between the 2 sites.

[enio.eltz]

Hi

As I know until nowadays, OXO doesn't understand NAT. You need to use VPN, MPLS or something OXO understands like a same LAN.

Regards.

[giovanni.attolini]

You cannot use NAT between the sites, but, if you really need, you must to change the SIP header of the packets using a "SIP conntrack". This software permits that you change the sip header. I've heard that works fine but I never tried it because I never needed. You must install on each server.

[tot3nkopf]

You cannot use NAT between the sites, but, if you really need, you must to change the SIP header of the packets using a "SIP conntrack". This software permits that you change the sip header. I've heard that works fine but I never tried it because I never needed. You must install on each server.

That is basically what an SBC does, but I don't think that the price of such software is covered by a SMB PBX. I think VPN is his best choice.