What is overlap dialing?
Overlap dialing is required by CAS signaled lines. Overlap dial
provides for a longer time-out period between digits, also called the
inter-digit timer. With overlap dial set to off, the gateway expects to
receive the digits one right after the other coming in to this line with
very little delay between digits. With overlap dial set to on, then the
device waits up to about 2 seconds between digits.
Basically overlap dialing is a mechanism where a destination number can be
specified partially to complete the first stage of a routing path. For
example, if the number was "23168104", it may be possible for the telecom to
dial "23168" to reach the first port of call as quickly as possible (to save
time on sending the remaining 3 digits) and then deliver the remaining 3
digits "104" in overlap mode. That's as far as I can explain it - and
hopefully it's not complete hogwash because the information on the internet
about this is very thin on the ground, it's a problematic issue, and most
telecom providers are trying to phase it out.
General 3CX Phone System FAQs 
|
