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it is the client IP

yes, same for TCP. the packet size is small, does not seem related to fragmentation

Thanks alot for your help, I tried all NAT options, also nat-options-ping and rport are set but still with no luck. I am developing an android application based on PJSIP, the only workaround which works for me is setting the UDP keepalive to 1 second, I don't think this is good. I was using...

I tried another test with WiFi and I see the issue. it happens if the line is idle for a few seconds. I tried another test, end the call, and immediately start a new one, in this case, I don't see retransmission.

it is running on the same FreeSWITCH server. so you think that endpoint sends the INVITE and it does not receive the OK from the server? could it be related to NAT?

Hi I have an issue when connecting the endpoint with 3G connection. I see multiple SDP invites are sent from the endpoint and this delays the call start signal. when I connect using WiFi I see only one invite and the call start signal is fast. Attached sngrep output. appreciate your help.

I am trying to use continue_on_fail=false in a paging dialplan to drop the call if one of the receivers is busy. can this be done? I am trying to fix a case when two extensions press call at the same time, in that case I want to drop the call for both. flowing are my dialplan and sngrep snapshot.

Hi is there a way to drop the call when one of the destinations returns busy?

Hi I have two extensions sending call invite at the same time on a page with auto ansawer. In this case, both extensions take the call and can send/receieve at the same time. is there a way to reject on of the two calls? or even drop both? Thanks

Thanks very much for your help, I was developing my android app using PJSIP. there is an option to disable via rewrite, I disable it and it fixed my problem.

so you think this is a device issue? I thought it is something related to NAT configurations in fusionPBX, please note that the same device configurations is working fine with 3G

Thanks for the response, following the trace. Now even the invite fails. nta.c:9165 outgoing_timer_dk() nta: timer K fired, terminate OPTIONS (28015997) nta.c:8837 outgoing_reclaim_queued() outgoing_reclaim_all((nil), (nil), 0x7f51e2f43d00) nta.c:8984 _nta_outgoing_timer() nta_outgoing_timer...

Hi, I am getting this error when calling an extension. Both extensions are behind the NAT, the call is started and I can hear the voice. but hangup fails with the following error. If I used a 3G connection for both extensions, start and end call work fine. tport.c:3286 tport_tsend()...