This is the inter-digit timeout that indicates the amount
of time the managed system waits for a subsequent input
digit from the caller. The timer is started upon receipt of
an input digit and restarted as each digit is received
until the destination address is identified. If the timer
expires and no destination address is identified, the
caller is signaled through the appropriate tone and the
call is abandoned. The value of zero disables the timer.
The default value of this object is 10 seconds.