Yealink SIP-T2 SERIES Administrator's Manual page 507

Configuration File
Local
Details of the Configuration Parameter:
sip.use_23_as_pound
Description:
Enables or disables the IP phone to reserve the pound sign (#) in the user name.
0-Disabled (convert the pound sign into "%23")
1-Enabled
Web User Interface:
Features->General Information->Reserve # in User Name
Phone User Interface:
None
To configure reserve # in user name feature via web user interface:
Click on Features->General Information.
1.
<y0000000000xx>.cfg
Web User Interface
Parameter
Configuring Basic Features
Configure reserve # in user name.
Parameter:
sip.use_23_as_pound
Configure reserve # in user name.
Navigate to:
For
SIP-T48G/T46G/T42G/T41P/T40P/T2
9G/T27P/T23P/T23G/T21(P)
E2/T19(P) E2/CP860:
http://<phoneIPAddress>/servlet?p
=features-general&q=load
For SIP VP-T49G:
http://<phoneIPAddress>/servlet?m
=mod_data&p=features-general&q
=load
Permitted Values
0 or 1
Default
1
483