This object specifies the period between receiving
digits.
The GW starts this timer during digit collection when
the digit string that it has collected matches at least
one pattern in the digit map, but reception of another
digit could change the match to a different pattern.
In this case, GW waits to confirm that no more digits
are received while this timer is running before
reporting the match to the MGC.
The value of 0 indicates the timer will not be started
and GW would report immediately.