Yealink SIP-T2 SERIES Administrator's Manual page 605

Parameters
account.X.subscribe_mwi_expires
Description:
Configures MWI subscribe expiry time (in seconds) for account X. The IP phone is
able to successfully refresh the SUBSCRIBE for message-summary events before
expiration of the subscription dialog.
X ranges from 1 to 16 (for SIP VP-T49G/SIP-T48G/T46G/T29G)
X ranges from 1 to 12 (for SIP-T42G)
X ranges from 1 to 6 (for SIP-T41P/T27P)
X ranges from 1 to 3 (for SIP-T40P/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860)
Note: It works only if the value of the parameter ―account.X.subscribe_mwi‖ is set to
1 (Enabled).
Web User Interface:
Account->Advanced->MWI Subscription Period (Seconds)
Phone User Interface:
None
account.X.subscribe_mwi_to_vm
Description:
Enables or disables the IP phone to subscribe the message waiting indicator to the
voice mail number for account X.
0-Disabled
1-Enabled
X ranges from 1 to 16 (for SIP VP-T49G/SIP-T48G/T46G/T29G)
X ranges from 1 to 12 (for SIP-T42G)
X ranges from 1 to 6 (for SIP-T41P/T27P)
X ranges from 1 to 3 (for SIP-T40P/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860)
Note: It works only if the value of the parameter ―account.X.subscribe_mwi‖ is set to
1 (Enabled) and ―voice_mail.number.X‖ is configured.
Web User Interface:
Account->Advanced->Subscribe MWI To Voice Mail
Configuring Advanced Features
Permitted Values
Integer from 0 to
84600
0 or 1
Default
3600
0
583