Yealink SIP-T2xP Auto Provisioning Manual page 261

Appendix
Parameter Permitted Values Descriptions Web Setting Path
SIP-T4X: Y ranges from 1 to 12.) For SIP-T28P/T26P/T22P/T20P/T4X/CP860 IP
phones:
When Y=1, the default value is 1;
When Y=2, the default value is 1;
When Y=3, the default value is 0;
When Y=4, the default value is 0;
When Y=5, the default value is 1;
When Y=6, the default value is 1;
When Y=7, the default value is 0;
When Y=8, the default value is 0;
When Y=9, the default value is 0;
When Y=10, the default value is 0;
When Y=11, the default value is 0.
When Y=12, the default value is 0 (only
applicable to SIP-T4X IP phones).
For SIP-T21P/T19P IP phones:
When Y=1, the default value is 1;
When Y=2, the default value is 1;
When Y=3, the default value is 0;
When Y=4, the default value is 0;
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