Yealink SIP-T2 SERIES Administrator's Manual page 573

Parameters
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)
Note: It is not applicable to SIP-T19(P) E2 and CP860 IP phones.
Example:
account.1.blf_list_barge_in_code = *33
Web User Interface:
Account->Advanced->BLF List Barge In Code
Phone User Interface:
None
account.X.blf_list_retrieve_call_parked_code
Description:
Configures the feature access code for the call park retrieve for account X.
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)
Note: It is not applicable to SIP-T19(P) E2 and CP860 IP phones.
Example:
account.1.blf_list_retrieve_call_parked_code = *88
Web User Interface:
Account->Advanced->BLF List Retrieve Call Parked Code
Phone User Interface:
None
BLF List Key
For more information on how to configure the DSS Key, refer to
DSS Key on page 940.
Configuring Advanced Features
Permitted Values
String within 32
characters
Appendix D: Configuring
Default
Blank
551