[Asterisk-Users] allowing outside dialing only for SIP users

[David Arendt]

Hi,

I have one questions, which might be obvious but not for me as I am new 
to asterisk.
How do I modify that line in order to allow this extension for outside 
dialing only for SIP users ?

exten => _X.,1,Dial(Modem/ttyI1:${EXTEN})

Thanks in advance

Bye,
David Arendt