Yealink SIP-T48G Administrator's Manual page 816

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
This section provides the DSS key parameters you can configure on IP phones. DSS key consists of line key (line key is not applicable to SIP-T19(P) E2 and
CP860 IP phones), programable key and ext key (ext key is only applicable to SIP-T48G/T46G/T29G/T27P IP phones). The following table lists the number of
DSS keys you can configure for each phone model:
Phone Model Line Key
SIP-T48G
SIP-T46G
SIP-T42G
SIP-T41P
SIP-T40P
SIP-T29G
SIP-T27P
SIP-T23P/G
SIP-T21(P) E2
SIP-T19(P) E2
CP860
Note
The programable key takes effect only if the IP phone is idle.
The ext key takes effect only if the expansion module is connected to the IP phone.
796
Programable Key
29 13
27 13
15 11
15 11
3 11
27 14
21 14
3 11
2 11
/ 11
/ 8
Ext Key
39
39
/
/
/
39
39
/
/
/
/