[Asterisk-Users] Is there a way to not propagate a context included inside other context?

[Álvaro Palma]

I've defined my dialplan as showed below. My internal lines are numbered 
as 12345XX, and internal users can call another by the entire 7-digits 
extension, or by just last 2 digits.

[invalid]
exten => _X.,1,Playback(pbx-invalid)
exten => _X.,2,Hangup()

[internal]
include => invalid
exten => _XX,1,Dial(SIP/12345${EXTEN}) ; Short alias for internal lines
exten => _12345XX,1,Dial(SIP/${EXTEN}) ; Long alias for internal lines

[local]
exten => _XXXXXXX,1,Dial(Zap/g1/${EXTEN}) ; Local area calls

[full]
include => internal
include => local

(As it's defined, local also include invalid context)

My idea is that, if any user authorized to make only internal calls dial 
any number different than 12345XX, he/she'll receive the invalid 
message. Besides if any user authorized to make local calls dial any 
internal number, the call is routed internally (not via a NOT toll free 
call through the Zap channel).

My question is: Is there a way to NOT propagate the "invalid" context 
when the "internal" context is included by other? The problem I see is 
that, if any user authorized to make local and internal calls (e.g., in 
the full context), dial a number different than 12345XX, it receives the 
PBX-INVALID message, instead of dialing the external number through the 
Zap channel. Or if I switch the include order in the "full" context, 
even internal calls are routed through the Zap channel!!!

I know that maybe this dialplan is not the best in this case, but my 
final question is how to avoid the propagation of "preincluded" context 
beyond the scope of the context that explicitaly include it.

Thanks a lot for your answer.

-- 
Atly.
Álvaro Palma