For SIP-T48G/T48S/T46G/T46S:
X ranges from 1 to 6, Y ranges from 1 to 40.
For SIP-T29G/T27P/T27G:
X ranges from 1 to 6, Y ranges from 1 to 20, 22 to
40 (Ext key 21 cannot be configured).
When you assign the Speed Dial to the line key,
this parameter is used to specify the number you
want to dial out.
linekey.1.value = 1001
(Optional.) Configures the label displaying on the
LCD screen for each line key and each soft key.
This is an optional configuration.
For line keys (not applicable to SIP-T19(P)
E2/CP860/CP920 IP phones):
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 ranges from 1 to 4.
For ext keys (only applicable to SIP-
T54S/T52S/T48G/T48S/T46G/T46S/T29G/T27P/T27G