Someone in the forum said to post this over here so it doesn't get lost. Forgive me if I'm doing this wrong.
I don't like the way that a user can set call forward information for other users on the system. A rogue user could redirect someone else's calls to his/her extension. I also didn't like having two access codes to enable and disable call forward data. To "fix" this I disabled all call forward feature codes except for *52, *72, and *90 and placed the following in my extensions_custom.conf. These contexts in _custom are caught first in the dialplan before the built-in call forward contexts. Dial the code once and you will be prompted for the extension to forward to. Dial the code again and the forward is deactivated.
[from-internal-custom]
include => custom-CALLFORWARD
[custom-CALLFORWARD]
;callforward-busy
exten => *90,1,Answer
exten => *90,n,Wait(1)
exten => *90,n,Macro(user-callerid,)
exten => *90,n,Playback(call-fwd-on-busy)
exten => *90,n,Set(CFEXTEN=${DB(CFB/${AMPUSER})})
exten => *90,n,GotoIf($["foo${CFEXTEN}"="foo"]?startread)
exten => *90,n,dbDel(CFB/${AMPUSER})
exten => *90,n,Playback(de-activated)
exten => *90,n,Macro(hangupcall,)
exten => *90,n(startread),Playback(ent-target-attendant)
exten => *90,n,Read(CFEXTEN,then-press-pound,,,,)
exten => *90,n,GotoIf($["foo${CFEXTEN}"="foo"]?startread)
exten => *90,n,Set(DB(CFB/${AMPUSER})=${CFEXTEN})
exten => *90,n,Playback(call-fwd-on-busy&for&extension)
exten => *90,n,SayDigits(${AMPUSER})
exten => *90,n,Playback(is-set-to)
exten => *90,n,SayDigits(${CFEXTEN})
exten => *90,n,Macro(hangupcall,)
;callforward-all
exten => *72,1,Answer
exten => *72,n,Wait(1)
exten => *72,n,Macro(user-callerid,)
exten => *72,n,Playback(call-fwd-unconditional)
exten => *72,n,Set(CFEXTEN=${DB(CF/${AMPUSER})})
exten => *72,n,GotoIf($["foo${CFEXTEN}"="foo"]?startread)
exten => *72,n,dbDel(CF/${AMPUSER})
exten => *72,n,Playback(de-activated)
exten => *72,n,Macro(hangupcall,)
exten => *72,n(startread),Playback(ent-target-attendant)
exten => *72,n,Read(CFEXTEN,then-press-pound,,,,)
exten => *72,n,GotoIf($["foo${CFEXTEN}"="foo"]?startread)
exten => *72,n,Set(DB(CF/${AMPUSER})=${CFEXTEN})
exten => *72,n,Playback(call-fwd-unconditional&for&extension)
exten => *72,n,SayDigits(${AMPUSER})
exten => *72,n,Playback(is-set-to)
exten => *72,n,SayDigits(${CFEXTEN})
exten => *72,n,Macro(hangupcall,)
;callforward-no-answer
exten => *52,1,Answer
exten => *52,n,Wait(1)
exten => *52,n,Macro(user-callerid,)
exten => *52,n,Playback(call-fwd-no-ans)
exten => *52,n,Set(CFEXTEN=${DB(CFU/${AMPUSER})})
exten => *52,n,GotoIf($["foo${CFEXTEN}"="foo"]?startread)
exten => *52,n,dbDel(CFU/${AMPUSER})
exten => *52,n,Playback(de-activated)
exten => *52,n,Macro(hangupcall,)
exten => *52,n(startread),Playback(ent-target-attendant)
exten => *52,n,Read(CFEXTEN,then-press-pound,,,,)
exten => *52,n,GotoIf($["foo${CFEXTEN}"="foo"]?startread)
exten => *52,n,Set(DB(CFU/${AMPUSER})=${CFEXTEN})
exten => *52,n,Playback(call-fwd-no-ans&for&extension)
exten => *52,n,SayDigits(${AMPUSER})
exten => *52,n,Playback(is-set-to)
exten => *52,n,SayDigits(${CFEXTEN})
exten => *52,n,Macro(hangupcall,)
