[asterisk-users] Answered call not bridged

[Philipp von Klitzing]

Hi!

- upgrade to a current 1.4 version, 1.4.17 is very old (you probably run 
this because of the zaptel --> dahdi change, but still)

- do you have a SIP proxy or any "SIP-aware" hardware in your network 
that might play tricks on you, e.g. a SIP ALG (application layer gateway) 
on your Internet router or something similar?

- enable SIP debugging on your phone and check its logs; you could also 
do a packet capture on your router to see what exactly is happening and 
if Asterisk is somehow being cut out of the loop

- see if canreinvite=no somehow helps; disable STUN on your phone inside 
the LAN, and maybe even block direct Internet traffic for your LAN phones 
so that they must go through Asterisk.

Philipp