Yealink SIP-T38G Administrator's Manual page 274

Range
Example
Parameter-
account.x.session_timer.refresher
Description
Format
Default Value
Range
Example
Parameter-
sip.rfc2543_hold
Description
Format
Default Value
Range
Example
1-999
account.1.session_timer.expires = 300
Configuration File
<MAC>.cfg
Configures the session timer refresher for
account X.
If set to 0 (UAC), refreshing the session is
performed by the IP phone.
If set to 1 (UAS), refreshing the session is
performed by a SIP server.
X ranges from 1 to 6.
Boolean
0
0-UAC
1-UAS
account.1.session_timer.refresher = 1
Configuration File
<y0000000000xx>.cfg
Specify whether RFC 2543 (c=0.0.0.0)
outgoing hold signaling is used.
If set to 0 (Disabled), use SDP media direction
attributes (such as a=sendonly) per RFC 3264
when putting a call on hold.
If set to 0 (Enabled), use SDP media
connection address c=0.0.0.0 per RFC 2543
when putting a call on hold.
Boolean
0
0-Disabled
1-Enabled
sip.rfc2543_hold = 1
Appendix
261