Register Descriptions
F-74 AT Commands
NOTE
If you use register S23 to change the parity set automatically or set by -On, the
same number of data and stop bits used before the change is retained. For example,
if 8 data bits and even parity is set (-O6) and you change register S23 to odd parity,
the 8 data bits and 1 parity bit are retained. However, the parity becomes odd
instead of even, changing the Serial Port Parity command setting to -O5.
S25 Delay to DTR and Asynchronous/Synchronous Time Delay
Range:
Delay to DTR: 0 - 255 hundredths of a second
Async/sync mode: 0 - 255 seconds
Default:
Delay to DTR: 5 hundredths of a second (0.05 seconds)
Async/sync mode: 5 seconds and 0.05 seconds
Delay to DTR: During asynchronous mode and during synchronous mode with &M2
or &M3 set, the modem ignores an On-to-Off transition of DTR that is less than the
register S25 time delay.
Asynchronous/synchronous time delay: Register S25 has two functions when &M1 is
set. First, it sets the number of seconds the modem waits to check DTR after
establishing a connection. This allows enough time to disconnect the modem from an
asynchronous terminal and attach it to a synchronous computer without forcing the
modem back to command state. Then, after this time delay, the Delay to DTR time
delay described above takes effect when loss of DTR occurs.
S26 RTS to CTS Delay Interval
Range:
0 - 255 hundredths of a second
Default:
1 hundredth of a second (0.01 seconds)
When Clear To Send (CTS) tracks Request To Send (RTS) and the modem detects an
Off-to-On transition of RTS, register S26 sets how long the modem waits before
turning on CTS. CTS tracks RTS when either &R0 or &R2 is set.
NOTE
The modem uses this register during synchronous operation only.
