Acceptance And Transmission Of The Dialed Digits - Cisco 8831 Administration Manual

About Dial Plan
U.S. international dialing:
Informational numbers:

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 more digits are entered by the user, the
set of candidates diminishes until only one or none are 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 do not match 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.
Cisco Unified IP Conference Phone 8831 for Third-Party Call Control Administration Guide
6-4
EXAMPLE: ( [1-8]xx | 9, xxxxxxx | 9, <:1>[2-9]xxxxxxxxx | 8, <:1212>xxxxxxx | 9, 1
[2-9] xxxxxxxxx | 9, 1 900 xxxxxxx ! |
9, 011xxxxxx. After the user presses 9, an external dial tone sounds. The user can enter any number
that starts with 011, as in an international call from the U.S.
EXAMPLE: ( [1-8]xx | 9, xxxxxxx | 9, <:1>[2-9]xxxxxxxxx | 8, <:1212>xxxxxxx | 9, 1
[2-9] xxxxxxxxx | 9, 1 900 xxxxxxx ! | 9, 011xxxxxx. |
0 | [49]11 This example includes two digit sequences, separated by the pipe character. The first
sequence allows a user to dial 0 for an operator. The second sequence allows the user to enter 411
for local information or 911 for emergency services.
9, 011xxxxxx.
| 0 | [49]11 )
0 | [49]11
Processing
The number is rejected.
If the sequence is allowed by the dial plan, the number is
accepted and is transmitted according to the dial plan.
If the sequence is blocked by the dial plan, 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 specified by the applicable interdigit timer.
The Interdigit Long Timer applies when the dialed digits
do not match any digit sequence in the dial plan. The
default value is 10 seconds.
The Interdigit Short Timer applies when the dialed digits
match one or more candidate sequences in the dial plan.
The default value is 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.
Chapter 6 Configure Dial Plan
)