Call Forwarding

From Etel

1 Call Forward

Call Forward

Call Forward - CFW

Problem

Provide a number in your dialplan, which can be dialed by any user to enable Call Forwarding. As with Do Not Disturb, also here i would recommend to use AstDB and a Macro to keep everything easier to maitain and understand.

As this Recipe is based on the CallerID(num) to store the CallForwardNumber on AstDB, just as an example we show your here a SIP account

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Solution

sip.conf

[MoutaPT]
type=friend
secret=12345
qualify=no
port=5060
nat=no
host=dynamic
dtmfmode=rfc2833
context=from-internal
canreinvite=no
callerid="MoutaPT"<2000> ; CallerID(name) and CallerID(number) that will be used later on in our dialplan

extensions.conf


[macro-cfw-on]
;${ARG1} the number to dial on CFW
exten => s,1,GotoIf($[${CALLERID(num)}=${ARG1}]?invalid|1);Prevents call forward to your self, would take you into an Infinite Loop!
exten => s,n,Set(DB(CFW/${CALLERID(num)}=${ARG1})
exten => s,n,playback(call-forward)
exten => s,n,playback(is-set-to)
exten => s,n,saydigits(${ARG1})
exten => s,n,hangup

exten => invalid,1,Playback(invalid)
exten => invalid,n,hangup

exten => h,1,hangup

[macro-cfw-off]
exten => s,1,DBdel(CFW/${CALLERID(num)})
exten => s,n,playback(call-forward)
exten => s,n,playback(disabled)
exten => s,n,hangup
exten => h,1,hangup
;Users should dial 30*XXXXXXXX, where XXXXX is the number they want to set their Call Forwarding
;Users should dial 31 to Disable the CallForwarding

[internal-services]
exten => _30*.,1,Macro(cfw-on,${EXTEN:3})
exten => 31,1,Macro(cfw-off)

Every time there is call to an extension on your PBX you need to check whether or not CFW is ON:
- Considering your internal extensions are SIP with pattern 2XXX


[from-internal]
exten => _2XXX,1,GotoIf(${DB_EXISTS(CFW/${EXTEN})}?CFW-ON,1);If entry exists on AstDB it means CFW is ON
exten => _2XXX,n,Dial(SIP/${EXTEN},20,t) ; 
exten => _2XXX,n,hangup

exten => h,1,hangup

exten => CFW-ON,1,Set(cfwnumber=${DB(CFW/${MACRO_EXTEN})}) ; Retrieve from AstDB the number to forward the call
exten => CFW-ON,2,Goto(cfw-context,${cfwnumber},1) ; Inside cfw-context we could control and log the forward calls...

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