[asterisk-users] Only secretary can call the boss, all others only reach the secretary when dial the boss extension

[Ricardo Carvalho]

Dear all,

How may I configure my extensions.conf so that only the boss's secretary 
can call the boss through his extension, all others when dial his 
extension only makes the boss's secretary phone ring, not his. If she 
wants, she can transfer the incoming call to the boss dialling his 
extension.

I've tried the following, but it doesn't work:

exten => _boss_extension/callerid_secretary,1,Dial(SIP/boss_extension)
exten => _boss_extension,1,Dial(SIP/secretary_extension)

This doesn't work because when the secretary tries to transfer the call 
to the boss (using her phone's transfer key, not #), one REFER SIP 
message is sent back to the caller's phone providing him the new address 
for whom the next INVITE should be sent. That INVITE is sent, but when 
reaches Asterisk, that INVITE matches this line:

exten => _boss_extension,1,Dial(SIP/secretary_extension)

and not this one:

exten => _boss_extension/callerid_secretary,1,Dial(SIP/boss_extension)



Any ideas of how may I solve this issue?
Regards,
Ricardo.