At Register Summary - Epson 500 Series User Manual

AT Register Summary (continued)
Command
Description
S13
Reserved
S14 Option register
(see below)
S15
Reserved
S16
Self-test register
S17
Reserved
S18
Self-test timer value
S19 Reserved
S20
Reserved
S21
Option register
(see below)
S22
Option register
(see below)
S23
Option register
(see below)
S24
Reserved
S25
DTR delay value
S26
RTS to CTS turnaround delay
S27
Option register
(see below)
S37
MNP modem line connect
speed
Unit
Range
None
None
None
None
0-255
1/100 sec
None
Fax/Modem
Default
AAH
00H
76H
07H
005
40H
B-9