I am curious what the recommended destination-pattern for a "dial 9 to access an outside line" situation is for CME?
A destination-pattern of just "9" works well, but there is a delay while the line is grabbed, so if a user quickly enters 9 and a whole phone number without waiting a second the first couple digits are lost. That also grabs a line before the user enters the whole number. So if a user hits 9, then sits there and thinks, the line is still chewed up even if he does not complete the call.
A destination-pattern of 9....... works great for local calls, because it does not take the line off hook till the full number has been entered.
A destination-pattern of 9........... works great too for long distance numbers, with 1 plus the area code and full number.
However, how would I create a destination-pattern that matches both?
Do most people just set the destination-pattern to be "9" and tell users to wait for the dial tone? Do people set up two sets of dial-peers for local and long distance? That would work, but with eight FXO lines it would make the config much more messy than a single destination-pattern that matches both.
I have tried 9%, but it consumes the first digit I dial after the 9. "9T" works, but unless I set the interdigit timeout very low, the user has a long wait before the call is connected.
So basically I am curious to see what other people use as a destination-pattern for accessing outside lines?
Here is what Cisco recommends in the CME SRND Guide;
!11-digit long-distance PSTN dialing with an access code of 9
dial-peer voice 1 pots
!7-digit local PSTN dialing with an access code of 9
dial-peer voice 4 pots
From this good design doc;
Cisco Unified CallManager Express Solution Reference Network Design Guide
Cisco Unified CallManager Express Dial Plan
Hope this helps!