Configuring Dial Plans
About Dial Plans
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 197
8
When a user lifts a handset or presses a speaker button on the IP phone, the
following sequence of events begins:
1. The phone begins collecting the dialed digits. The inter-digit timers starts
tracking the time that elapses between digits.
2. If the inter-digit timer value is reached, or if another terminating event occurs, the
phone compares the dialed digits with the IP phone’s dial plan. (This dial plan is
configured in the configuration utility in the Voice tab, on the tab for each
extension (Ext N), under the Dial Plan section.)
If the phone is part of a Cisco SPA 9000 system:
3. If the phone dial plan allows the call to process, the dialed numbers are sent to
the Cisco SPA 9000.
4. The Cisco SPA 9000 compares the dialed digits to the CALL ROUTING RULE (on
the SPA 9000 Voice > SIP page, PBX Parameters section).
5. If the call routing rule allows the call to process, then the Cisco SPA 9000
compares the dialed digits to the LINE INTERFACE dial plan (on the Cisco SPA
9000 Voice > Line N page, Dial Plan section).
6. The Cisco SPA 9000 uses the information in the line dial plan to manipulate the
number (for example, to remove steering digits) and then transmits the number.
NOTE The dial plan feature (digit sequences and timers) is not used with the Cisco
SPA525G2 phone line associated to Mobile Link (a Bluetooth-enabled mobile
phone). Mobile phone dial plan rules continue to apply in this scenario.
Refer to the following topics:
• Digit Sequences, page 198
• Digit Sequence Examples, page 200
• Acceptance and Transmission of the Dialed Digits, page 202
• Dial Plan Timer (Off-Hook Timer), page 203
• Interdigit Long Timer (Incomplete Entry Timer), page 204
• Interdigit Short Timer (Complete Entry Timer), page 205
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