[asterisk-users] SIP over 3G Mobile Network using NAT

[Chirag Ajmera]

Dear,

Kindly guide with the 2 issues mentioned below

*#1* - *Host unreachable 0 last qualify 0 (only in 3G**)*

I am trying to use SIP client over 3G. It registers and call can be 
initiated from the client but it can't receive call; cause *asterisk 
sever *marks it as unreachable immediately after registration.

"[2014-10-08 14:32:47] NOTICE[1610]: chan_sip.c:29596 sip_poke_noanswer: 
Peer '1007' is now UNREACHABLE! Last qualify: 0"

The above work well when I turn off 3g and switch over to my office 
wifi. Kindly guide if there are specific settings for 3G / mobile network.

*#2* - *SIP retransmits - no reply to our critical packet*

Issue occurs when dialing a call out from a remote wifi network ( in my 
case office wifi ), Its auto disconnected within 10s with SIP 
Retransmissions notice / warning message

However if a call is initiated from home local network ( ipad ) to the 
phone ( registered with asterisk over office wifi )... all works well !

*Issues with call sequence in a table form*
*Local Device* 	Asterisk SIP Server & Router with NAT Port Forwards 
iPad with Bria SIP Client 	
	
*Remote Device* 	iPhone with Bria SIP Client 	
	
	

	
	
	
	
*CALL SEQUENCE*
*Remote Network* 	*From * 	*To* 	*Works/Failed* 	*Issue*
*3G* 	Ipad ( local ) 	Iphone ( remote ) 	FAILED 	Host unreachable 0 last 
qualify 0 !

	Iphone ( remote ) 	Ipad ( local via NAT ) 	WORKS -- both Audio & Video 	

	
	
	
	
*Office Wifi / Broadband* 	Ipad ( local ) 	Iphone ( remote ) 	WORKS -- 
both Audio & Video 	

	Iphone ( remote ) 	Ipad ( local via NAT ) 	FAILED 	SIP retransmits - no 
reply to our critical packet ! Call disconnects within 10s


Kindly guide

-- 
Thank You
Best,
Chirag A.
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