Yealink SIP-T2 Series Provisioning Manual page 209

Permitted
Parameter
Values
account.X.unr
egister_on_re
boot =
(SIP-T28: X
ranges from 1
to 6.
0 or 1
SIP-T26P/T22P:
X ranges from
1 to 3.
SIP-T20P: X
ranges from 1
to 2)
account.X.co
mpact_heade
r_enable =
(SIP-T28: X
ranges from 1
to 6.
0 or 1
SIP-T26P/T22P:
X ranges from
1 to 3.
SIP-T20P: X
ranges from 1
to 2)
account.X.mus
ic_on_hold_ty
pe =
(SIP-T28: X
ranges from 1
to 6.
0 or 1
SIP-T26P/T22P:
X ranges from
1 to 3.
SIP-T20P: X
ranges from 1
to 2)
Descriptions
When Y=11, the default value is 105.
It enables or disables the phone to
un-register account X before a reboot.
0-Disabled
1-Enabled
The default value is 0.
It enables or disables the phone to
support compact SIP header for
account X.
0-Disabled
1-Enabled
The default value is 0.
It configures the way on how the
phone processes Music On Hold when
placing an active call on hold for
account X.
0-Calling the music server before
holding
1-Calling the music server after
holding
The default value is 0.
Appendix
Web Setting Path
Account->
Advanced->
Unregister When
Reboot
199