Yealink SIP-T2 Series Administrator's Manual page 556

Administrator's Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
T54S/T-
T48S T48G
52S
(Flash-
(Flash- (Flash-
ing)
ing) ing)
550
T42S/T- T42G/T-
T46S T46G
41S
/
(Flash- (Flash-
ing) ing)
/
T40P- T27-
T29G
41P /G G
/ /
(Flash-
ing)
/ /
T19
CP9- T23P/T23G-
(P) Description
20 /T21(P) E2
E2
public hold
USB flash
drive/PSTN
box is detect-
/ / ing (PSTN
box is only
applicable to
CP920)
USB flash
/ / drive is
detected
High Defin-
ition Voice