[Asterisk-Users] How to make an X100P answer only one distinctivering cadence?

[TC]

>Another option is Aastra's Ring Selectors.  They can "split" a line into
>multiple lines by ring cadence.
>
>http://www.aastra.com/Products/RingSelectors/index.html
Don't you then have to wait 4 rings b4 an extension will get a * dial ?
This devices must wait 2 rings to detect the cadence
then * is gonna wait 2 rings trying to get CallerID which I think
it will NEVER get since that comes from the CO line between the
1st & 2nd ring ???
Or Will the device pass along the caller id when it rings through