[Asterisk-Users] 20 seconds til voice transmission starts

[Rich Adamson]

> I'm experiencing a strange problem with my Asterisk. I hope you can help:
> 
> Asterisk is running at my company behind NAT. Ports 5060 and 10000-20000 
> are being forwarded to it. I have put the router's external IP-address 
> into externip in sip.conf. At home I'm using an AVM FritzBox Fon WLAN 
> 7050 which is registered with the Asterisk at my company.
> 
> When I try to call Asterisk (or a phone connected to the attached 
> legacy-pbx) from home, it's ringing normally and I can hear my opposite. 
> But it takes about 20 seconds until my opposite hears me! When I call 
> the same number again staight after, everything is working fine from the 
> beginning. Also, calls from the company to my home are working perfectly.
> 
> I'm greateful for any tips!

One way to identify the issue is to run ethereal to see what's happening
with the udp ports. If that doesn't provide a clue, then run asterisk
with additional levels of debug/verboseness.