extension.conf
[std-test]
exten => *601,1,Answer
exten => *601,n,Dial(IAX2/pbxnetwork/xxxxxx,30,m)
exten => *601,n,Hangup

exten => *602,1,Answer
exten => *602,n,Dial(IAX2/pbxnetwork/xxxxxx,30)
exten => *602,n,Hangup

----
Originate command 1 (working fine)

Action: Originate
Channel: IAX2/test
Exten: *601
Callerid: IAX2/test
Account: test
Context: std-test
Priority: 1

Originate command 2 (not working with IDEFISK)

Action: Originate
Channel: IAX2/test
Exten: *602
Callerid: IAX2/test
Account: test
Context: std-test
Priority: 1

----

Debug Output of Origination to *601
- Call accepted by xx.xxx.xxx.xx (format gsm)
    -- Format for call is gsm
       > Channel IAX2/test-2 was answered.
    -- Executing Answer("IAX2/test-2", "") in new stack
    -- Executing Dial("IAX2/test-2", "IAX2/pbxnetwork/0xxxxxx|30|m") in new stack
    -- Called pbxnetwork/0xxxxxx
    -- Started music on hold, class 'default', on channel 'IAX2/test-2'
    -- Call accepted by xx.xxx.xxx.xx (format gsm)
    -- Format for call is gsm
    -- IAX2/pbxnetwork-6 is making progress passing it to IAX2/test-2
    -- IAX2/pbxnetwork-6 is ringing
    -- IAX2/pbxnetwork-6 answered IAX2/test-2
    -- Stopped music on hold on IAX2/test-2
    -- Hungup 'IAX2/pbxnetwork-6'
    -- Hungup 'IAX2/test-2'

Debug Output of Origination to *602
- Call accepted by xx.xxx.xxx.xx (format gsm)
    -- Format for call is gsm
       > Channel IAX2/test-3 was answered.
    -- Executing Answer("IAX2/test-3", "") in new stack
    -- Executing Dial("IAX2/test-3", "IAX2/pbxnetwork/0xxxxxx|30") in new stack
    -- Called pbxnetwork/0xxxxxx
    -- Call accepted by xx.xxx.xxx.xx (format gsm)
    -- Format for call is gsm
    -- IAX2/pbxnetwork-4 is making progress passing it to IAX2/test-3
    -- IAX2/pbxnetwork-4 is ringing
    -- IAX2/pbxnetwork-4 stopped sounds
    -- IAX2/pbxnetwork-4 answered IAX2/test-3
    -- Hungup 'IAX2/pbxnetwork-4'
    -- Hungup 'IAX2/test-3'