Yealink SIP-T48G Administrator's Manual page 216

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
"9001$145$2". When you dial out "0012354599" on your phone, the IP
phone will replace the number with "90012354599". "$1" means 3
digits in the first parenthesis, that is, "235". "$2" means 2 digits in the
second parenthesis, that is, "99".
Replace rule is an alternative string that replaces the numbers entered by the user. IP
phones support up to 100 replace rules, which can be created either one by one or in
batch using a replace rule template. For more information on how to customize a
replace rule template, refer to
Procedure
Replace rule can be created using the configuration files or locally.
Configuration File
Local
Details of Configuration Parameters:
Parameters
dialplan.replace.prefix.X
(X ranges from 1 to 100)
Description:
Configures the entered number to be replaced.
Example:
dialplan.replace.prefix.1 = 1
Web User Interface:
Settings->Dial Plan->Replace Rule->Prefix
Phone User Interface:
196
Customizing Replace Rule Template File
<y0000000000xx>.cfg
Web User Interface
Permitted Values
String within 32 characters
on page 198.
Create the replace rule for the IP
phone.
Parameters:
dialplan.replace.prefix.X
dialplan.replace.replace.X
dialplan.replace.line_id.X
Create the replace rule for the IP
phone.
Navigate to:
http://<phoneIPAddress>/servlet
?p=settings-dialplan&q=load
Default
Blank