Zoom Dialer 27 - Manual (Page 18)

14 Hotline Dialer Installation & User Guide
In most configurations, many calls are never restricted, such as local calls
that don't start with a 1. The dialer typically lets the digits dialed for these
calls go directly to the central telephone office.
When a user dials an international call that may be restricted by the dialer,
the dialer will analyze the call after the user has stopped dialing for about
three seconds. The dialer does this because international phone numbers
vary in length, so it's hard for the dialer to tell when the user has finished
dialing all the required digits. To avoid the three-second delay, the user can
simply press # after dialing the last digit of the phone number. As soon as the
dialer hears the number, it decides whether the number dialed is restricted or
not, and dials as appropriate.
Frequently Asked Questions are covered in the next section. If you don't
have a question, you're done. Enjoy your dialer!