[Freeswitch-users] No Media in SIP Calling from 3G Mobile Internet to Freeswitch

[Alexey Sibyakin]

Hi,

Yes, that sounds like a network (NAT/Firewall) issue. Your mobile provider
may use a chain of several NATs and not every one of them is working
properly. Try VPN or another SIP client.

Regards,

Alex

Alex Sibyakin | Support Engineer SignalWire | 228 Hamilton Ave 3rd Floor,
Palo Alto, CA 94303 Email: alex at freeswitch.com Website:
https://www.signalwire.com



On Sat, Feb 2, 2019 at 2:44 AM Chhorm Chhatra <ch.chhatra at gmail.com> wrote:

> Hi,
> Currently, I face an issue that I could not hear the audio sound at all
> when I try to call to FreeSWITCH (9386) via its public domain name from the
> SIP client of my mobile phone with mobile internet.
> In this case, SIP registration with TLS and media encryption with SRTP is
> working perfectly because I could see the secure symbol in Linphone *but* I
> could not hear any audio at all. After 30 seconds of the silent call, it
> hanged up automatically.
>
> *SIP Client on the 3G Mobile Internet > Freeswitch (tls:voip.test.com
> <http://voip.test.com>, SRTP) *
> *SIP Registration Sucess, Call No Media*
>
> My question is that is this the problem of NAT? If so, it would be great
> if you could help me solve this problem.
> Any help would be really appreciated.
>
> Best regards,
> Chhorm Chhatra
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