[Asterisk-Users] extensions problem (SIP)

[Olle E. Johansson]

Jon Lawrence wrote:

> Surely * should know if a phone is in use ? After all it initiated/took part 
> in the call in the first place ;)

Again, the SIP device is not a "slave" device. It could receive a call from
somewhere else and be busy without Asterisk having a clue. A lot of SIP UAs,
like Xten software and the  SNOM 200 phone support multiple SIP accounts.

So Asterisk could keep track of how many simultaneous calls it can place to
the UA, but not decide if the UA is busy or not. The outgoinglimit code
is used for this, but it's disabled and non-functional right now.

The incominglimit limits how many simultaneous calls a UA may place to Asterisk.

/Olle