[HELP] Retrieve a transferred call if no one picks up

Asterisk Asterisk Support
1

Hi List,
If I transfer a call to another extension and that extension doesn’t pick up - how do I get the call back?

I’ve looked at SIPPEER functions, ChanIsAvail and stuff like that but it doesn’t look like it will do it…

Some help would be really appreciated…

mylo

2

it’s been a while since i used Asterisk-based functions for this (generally, a good phone is much better), but IIRC the disconnect option in features.conf can be used for this.

3

I didn’t realise there was a BLINDTRANSFER argument. I didn’t read the voip-info page well enough, there’s a good example there. I modified it slightly and used it in a macro like this:

[macro-sipextensionReturnTransferFailure]
exten => s,1,Dial(SIP/${ARG1},5,WwTtr)
exten => s,2,Gotoif($["${BLINDTRANSFER}"=""]?3:4)
exten => s,3,Hangup
exten => s,4,NoOp(Sending back to originalparty...${BLINDTRANSFER:0:$[4+${LEN(${ARG1})}]})
exten => s,5,Set(tx=${BLINDTRANSFER:0:$[4+${LEN(${ARG1})}]})
exten => s,6,SetCallerID(RET_${ARG1} <${CALLERIDNUM}>)
exten => s,7,Dial(${tx},,WwtTr)
exten => s,8,Hangup
exten => s,103,Set(tx=${BLINDTRANSFER:0:$[4+${LEN(${ARG1})}]})
exten => s,104,Wait(5)
exten => s,105,SetCallerID(Err_${ARG1} <${CALLERIDNUM}>)
exten => s,106,Dial(${tx},,WwTtr)
exten => s,107,Hangup

works a charm :smile:

4

the above macro presumes that the extension numbers are of the same length