Asterisk/FreePBX Blind Transfer Return Call to Origin

Another customer of ours requested this feature. By default, with blind transfers if the internal destination doesn’t answer the call, it goes to vociemail or terminates if vociemail is not configured. This customer wanted to return the call to the originator so that they can direct the call elsewhere.

You need to modify two places. They’re listed below.

globals_custom.conf:
TRANSFER_CONTEXT = custom-test_transfer

extensions_custom.conf:
[custom-test_transfer]
exten => _X.,1,NOOP(entering custom-test_transfer)
exten => _X.,n,set(timeoutd=25) ; set timeout in seconds
exten => _X.,n,set(extLeng=${LEN(${EXTEN})})
exten => _X.,n,noop(the extenlength is ${extLeng})
exten => _x.,n,dial(local/${EXTEN}@from-internal,${timeoutd})
exten => _X.,n,Gotoif($[“$\{DIALSTATUS}”=”ANSWER”]?hangup,callback)
exten => _X.,n,Set(CALLERID(name)=RB:${CALLERID(name)})
exten => _X.,n(callback),dial(local/${BLINDTRANSFER:4:${extLeng}}@from-internal)
exten => _X.,n(hangup),hangup()
exten => _*X.,1,dial(local/${EXTEN}@from-internal,15)
exten => _*X.,n,hangup()

Thanks to Alexander for fixing my earlier code. I am yet to test this on a live site 🙂

extensions_custom.conf:
[custom-test_transfer]
exten => _X.,1,NoOp(Entering custom-test_transfer)
exten => _X.,n,Set(timeoutd=25) ; set timeout in seconds
exten => _X.,n,Set(extLeng=${LEN(${EXTEN})})
exten => _X.,n,NoOp(The extenlength is ${extLeng})
exten => _X.,n,Dial(Local/${EXTEN}@from-internal,${timeoutd})
exten => _X.,n,Set(CALLERID(name)=RB:${CALLERID(name)})
exten => _X.,n,Dial(Local/${BLINDTRANSFER:4:${extLeng}}@from-internal)
exten => _X.,n,Hangup()

Once setup, reload asterisk and test this out.

There are several other scripts out there, but this is the one that worked correctly for me.

Common Issues with MOH – Asterisk/FreePBX

When working with MOH (Music on Hold) files in Asterisk/FreePBX I’ve come across a few issues that can occur regularly mainly due to human error. Best way to identify the issue is to check CLI entries when putting on hold as they give distinct clues as to what the problem is.

First one is that you get an error message stating cannot open or find the file. This is a permission issue. Make sure the MOH files are awned by asterisk user and has correct file permissions. This has happened to me more than one occasion when I’ve uploaded the file via SSH instead of the GUI or after doing a volume change using sox.

Second one you’d get is something on the line of unknown stream or unsupported format. Which simply means that asterisk doesn’t have the required tools to play the file.
With my customers, what I normally do is convert the files to wav files, on 8000 Hz, 16 bit, Mono settings using “Nero Wave Editor” and upload the files. This resolves many problems with different formats as well as reduces CPU load.

Final issue can be rectified using one of my earlier post.  : http://www.asanka.me/?p=19

Asterisk/FreePBX add Listen/Whisper/Barge facilities to your PABX

This page shows you how to add Listen/Whisper/Barge facilities to your Asterisk based PABX

A few of our customers wanted a feature to listen to other calls. Asterisk/FreePBX already provides ChanSpy, but the problem with it is that you cannot select what extension to listen to. After some digging around, found a few sites with instructions to get this done.

So here’s what I used to implement this. If you’re using this as it is, make sure that there are no feature codes using *222/*223 & *224.

Add below snippet to extensions_custom.conf. Reload asterisk and you’re good to go. To listen on extension 123, simply dial *222123.

[ext-local-custom]

;listen
exten => _*222x.#,1,Macro(user-callerid,)
exten => _*222x.#,n,Answer
exten => _*222x.#,n,NoCDR
exten => _*222x.#,n,Wait(1)
exten => _*222x.#,n,ChanSpy(sip/${EXTEN:4},q)
exten => _*222x.#,n,Hangup

;whisper
exten => _*223x.#,1,Macro(user-callerid,)
exten => _*223x.#,n,Answer
exten => _*223x.#,n,NoCDR
exten => _*223x.#,n,Wait(1)
exten => _*223x.#,n,ChanSpy(sip/${EXTEN:4},qw)
exten => _*223x.#,n,Hangup

;barge
exten => _*224x.#,1,Macro(user-callerid,)
exten => _*224x.#,n,Answer
exten => _*224x.#,n,NoCDR
exten => _*224x.#,n,Wait(1)
exten => _*224x.#,n,ChanSpy(SIP/${EXTEN:4},qB)
exten => _*224x.#,n,Hangup

 

Now, say there are some extensions that you don’t want to be listened on (ex. a manager), there are few ways to do it. But the simplest method I found is using below context. This needs to be added before the above set.

Here, no one should be able to listen/whisper/barge on extension 5205’s calls. What this code does is if someone tries to do be naughty, it will simply hangup the call.

;blockaccess
exten => _*2225205,1,Macro(user-callerid,)
exten => _*2225205,n,Hangup
exten => _*2235205,1,Macro(user-callerid,)
exten => _*2235205,n,Hangup
exten => _*2245205,1,Macro(user-callerid,)
exten => _*2245205,n,Hangup