Acceptance And Transmission Of The Dialed Digits; Dial Plan Timer (Off-Hook Timer) - Cisco 8800 Series Administration Manual

Cisco IP Phone Installation

Acceptance and Transmission of the Dialed Digits

When a user dials a series of digits, each sequence in the dial plan is tested as a possible match. The matching
sequences form a set of candidate digit sequences. As the user enters more digits, the set of candidates
diminishes until only one or none is valid. When a terminating event occurs, the IP PBX either accepts the
user-dialed sequence and initiates a call, or else rejects the sequence as invalid. The user hears the reorder
(fast busy) tone if the dialed sequence is invalid.
The following table explains how terminating events are processed.
Terminating Event
Dialed digits have not matched any sequence in the
dial plan.
Dialed digits exactly match one sequence in the dial
plan.
A timeout occurs.
A user presses the # key or the dial softkey on the IP
phone screen.

Dial Plan Timer (Off-Hook Timer)

You can think of the Dial Plan Timer as the off-hook timer. This timer starts when the phone goes off hook.
If no digits are dialed within the specified number of seconds, the timer expires and the null entry is evaluated.
Unless you have a special dial plan string to allow a null entry, the call is rejected. The default length of the
Dial Plan Timer is 5 seconds.
Syntax for the Dial Plan Timer
SYNTAX: (Ps<:n> | dial plan)
An executive assistant can use this pattern to initiate a call on behalf of an executive. The assistant can
dial the service activation code for call initiation, followed by the executive's number, followed by the
number that he or she wants to call.
Processing
The number is rejected.
If the dial plan allows the sequence, the number is
accepted and is transmitted according to the dial plan.
If the dial plan blocks the sequence, the number is
rejected.
The number is rejected if the dialed digits are not
matched to a digit sequence in the dial plan within the
time that the applicable interdigit timer specifies.
The Interdigit Long Timer applies when the dialed
digits do not match any digit sequence in the dial plan.
Default: 10 seconds.
The Interdigit Short Timer applies when the dialed
digits match one or more candidate sequences in the
dial plan. Default: 3 seconds.
If the sequence is complete and is allowed by the dial
plan, the number is accepted and is transmitted
according to the dial plan.
If the sequence is incomplete or is blocked by the dial
plan, the number is rejected.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
Acceptance and Transmission of the Dialed Digits
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