Description:
Configures a DSS key as a record key on the IP phone.
The digit 25 stands for the key type Record.
X ranges from 1 to 29 (for SIP-T48G)
X ranges from 1 to 27 (for SIP-T46G/T29G)
X ranges from 1 to 15 (for SIP-T42G/T41P)
X ranges from 1 to 21 (for SIP-T27P)
X ranges from 1 to 3 (for SIP-T23P/G)
X ranges from 1 to 2 (for SIP-T21(P) E2)