Yealink SIP-T28P - Manual (Page 77)

Customizing Your Phone
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You can configure multiple line keys to associate with an account. This enhances call
visualization and simplifies call handling. If this is the case, the LCD screen resembles
the following figure:
Incoming calls to this account will be distributed evenly among the available line keys.
Outgoing calls will be distributed similarly.
Your phone can be configured to have a combination of accounts with a single line key
and accounts with multiple
line keys.
Dial plan is a string of characters that governs the way your SIP-T28P IP phone processes
the inputs received from your phone keypad. The SIP-T28P IP phone supports the
following dial plan features:

Replace Rule

Dial-now

Area Code

Block Out
The basic expression syntax you need to know:
.
The dot "." can be used as a placeholder or multiple placeholders for any
character. Example:
"12." would match "123", "1234", "12345", "12abc", etc.
x
An "x" can be used as a placeholder for any character. Example:
"12x" would match "121", "122", "123", "12a", etc.
[]
The square brackets "[]"can be used as a placeholder for a single character
which matches any of a set of characters. Example:
"91[5-7]1234" would match "9151234", "9161234", "9171234".
()
The parentheses "( )"can be used to group together patterns, for instance, to
logically combine two or more patterns. Example:
“91([5-7])1(x)” would match “91511”, “91618”, “91715”, etc.
$ The “$” should be followed by the sequence number of a parenthesis. The