Yealink SIP-T2XP Administrator's Manual page 305

Example
180 Ring Workaround
Parameter-
phone_setting.is_deal180
Description
Format
Default Value
Range
Example
Use Outbound Proxy in Dialog
Parameter-
sip.use_out_bound_in_dialog
Description
Format
Default Value
Range
Example
486-Busy here
features.normal_refuse_code = 486
Configuration File
<y0000000000xx>.cfg
Enables or disables the IP phone to deal with
the 180 SIP message received after the 183
SIP message.
If set to 1 (Enabled), the IP phone resumes
and plays the local ringback tone upon a
subsequent 180 message received.
Boolean
1
0-Disabled
1-Enabled
phone_setting.is_deal180 = 1
Configuration File
<y0000000000xx>.cfg
Enables or disables the IP phone to send the
SIP messages to the outbound proxy server.
If set to 1 (Enabled), all the SIP request
messages from the IP phone will be forced to
send to the outbound proxy server.
Boolean
1
0-Disabled
1-Enabled
sip.use_out_bound_in_dialog = 1
Appendix
289