AT&T 610 - Page 110

Received Characters
Page 8-28
ESC[s Request Terminal Parameters
User .... s Guide
August 1985
Receiving the sequence ESC[s will cause the terminal to
transmit the option values. The terminal responds with the
sequence ESC[psl, ps2 ••• psI8 where each ps is an ASCII value
representing an option selection. Refer to Appendix D, Terminal
Options Upload, for the values of psI through ps18.