Yealink SIP-T48G Administrator's Manual page 464

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Parameters
X ranges from 1 to 21 (for SIP-T27P)
X ranges from 1 to 3 (for SIP-T40P/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
For programable keys:
X ranges from 1 to 4.
For ext keys:
X ranges from 1 to 6, Y ranges from 1 to 20, 22 to 40 (Ext key 21 cannot be
configured).
Note: It is not applicable to SIP-T19(P) E2 IP phones.
Web User Interface:
DSSKey->Line Key/Programable Key->Label
Phone User Interface:
Menu->Features->DSS Keys->Line Key X->Label
To configure LDAP via web user interface:
1. Click on Directory->LDAP.
2. Enter the values in the corresponding fields.
3. Select the desired values from the corresponding pull-down lists.
4. Click Confirm to accept the change.
To configure an LDAP key via web user interface:
1. Click on DSSKey->Line Key (or Programable Key).
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Permitted Values Default