Yealink SIP-T54S Administrator's Manual page 537

Web User Interface
Phone User Interface
ReCall Key
For more information on how to configure the DSS Key, refer to
Key on page 1014.
Details of Configuration Parameters:
Parameters
linekey.X.type/
programablekey.X.type/
expansion_module.X.key.Y.type
Description:
Configures a DSS key as a recall key on the IP phone.
The digit 7 stands for the key type ReCall.
For line keys:
X ranges from 1 to 29 (for SIP-T48G/S)
X ranges from 1 to 27 (for SIP-T54S/T46G/T46S/T29G)
X ranges from 1 to 15 (for SIP-T42G/T42S/T41P/T41S)
X ranges from 1 to 21 (for SIP-T52S/T27P/T27G)
X ranges from 1 to 3 (for SIP-T40P/T40G/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
For programable keys:
X=1-10, 12-14 (for SIP-T54S/T48G/T48S/T46G/T46S)
X=1-10, 13 (for SIP-T52S/T42G/T42S/T41P/T41S/T40P/T40G)
X=1-14 (for SIP-T29G/T27P/T27G)
X=1-10, 14 (for SIP-T23P/T23G/T21(P) E2)
X=1-9, 13, 14 (for SIP-T19(P) E2)
X=1-6, 9, 13 (for CP860/CP920)
For ext keys:
For SIP-T54S/T52S:
Configuring Basic Features
programablekey.X.label/
expansion_module.X.key.Y.label
linekey.X.shortlabel
Assign a recall key.
Navigate to:
http://<phoneIPAddress>/servlet?p
=dsskey&q=load&model=0
Assign a recall key.
Appendix D: Configuring DSS
Permitted Values
7
Default
Refer to the
following content
511