[asterisk-users] Calls Dropping

[Tarek Sawah]

i'm having the same problem with one of my call centers located in Egypt.. although the ip-phones are located on a Dedicated Leased Line yet calls drop out of the blue.almost an identical setup as yours..provider located in France (data center) my server located in Sweden (data center) both on public network no NAT.. and the remote office is behind NAT.somehow i suspect Internet problems with your case.. as RTP packets should not stop arriving unless internet connection is timing out. i suppose your calls that are dropping are INBOUND coming from your provider and directed to your remote location.. and you don't have any problems with OUTBOUND calls from your remote location to your server ( I have setup a loop test that goes between 5 locations originating from my remote location and returns to the remote location through 5 hops including IPKALL servers and call goes well with no problem). and let me take a wild guess.. your provider is offering a premium number services.my advise check your internet connection on the remote location and keep a ping from that network to your server running all the time to check for time outs.

-- Tarek Sawah

Integrated Digital Systems

CCNA, MCSE, RHCE, VoIP  USA: +1 347 562 2308






From: dan at keshercommunications.com
To: asterisk-users at lists.digium.com
Date: Thu, 29 Apr 2010 16:33:06 -0400
Subject: [asterisk-users] Calls Dropping
















Hi,

 

I’m having a major problem with random calls dropping.
After spending weeks trying to figure it out, i’ve finally spotted the
issue but don’t know how to resolve it.

 

I run a sip server that’s hosted in a data centre. It
has a public IP address with no nat involved. My provider also has a public ip
with no nat involved.

 

The sip phones are in a remote office behind a nat router. 

 

Every so often, all the rtp data coming from the remote
location stops arriving at my sip server. 

So after about 30 seconds, the call gets terminated by my
provider because i’m not sending any rtp packets to them.

 

Any ideas why the rtp data should stop coming in, and how
can I resolve it?

 

Asterisk v1.4.30

6 x Linksys SPA921

Router at remote site is a Thomson TG585v7

 

Any assistance will be greatly appreciated. 

Many thanks

Dan

 		 	   		  
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