It does not depend on the called numbers, the problem occurs on all numbers, at test campaign we tried out fixed and mobile numbers, which are defenitly working.
The calls are in the call_log and also are in cdr log with "NO ANSWER".
Before the Dial Command in the CLI appears the message for call_log completed appears. (real calledNr has been replaced with 00123456789)
-- Executing AGI("Local/00123456789@default-b98f,2", "agi://127.0.0.1:4577/call_log") in new stack
-- AGI Script
agi://127.0.0.1:4577/call_log completed, returning 0
-- Executing Dial("Local/00123456789@default-b98f,2", "IAX2/userid:password@111.222.333.444/00123456789|55|o") in new stack
-- Called userid:password@111.222.333.444/00123456789
-- Call accepted by 111.222.333.444 (format ulaw)
-- Format for call is ulaw
-- IAX2/userid-16 is ringing
-- IAX2/userid-16 is making progress passing it to Local/00123456789@default-b98f,2
-- Hungup 'IAX2/userid-16'
== Spawn extension (default, 00123456789, 5) exited non-zero on 'Local/00123456789@default-b98f,2'
-- Executing DeadAGI("Local/00123456789@default-b98f,2", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----0-----CANCEL----------") in new stack
== Manager 'sendcron' logged off from 127.0.0.1
-- AGI Script
agi://127.0.0.1:4577/call_log--HVcauses ... ---------- completed, returning 0