[Asterisk-Users] How does asterisk know the did called on?

[Eric Wieling aka ManxPower]

Courtney Couch wrote:
> If I were to buy 20 did's how do I know within asterisk which number was 
> dialed? (like say I want a few of the did's to ring specific extensions 
> if they are dialed and others to go through the menu)
> 
> Is there any ${var} that has the number dialed in on? (that would be 
> optimum).

Your carrier can tell you how many digits they will send to you. 
Asterisk sees these digits and will match exten => 1234,1,Blah if the 
carrier sends you 4 digits.

Remember Asterisk does not really support DID on analog ports, only 
T-1/E-1 (including PRI) ports , BRI ports, and VoIP ports.