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Using the AT Automatic Calling Interface 5-15
Using the
AT ACU
S-Register 25—Delay Before Looking for DTR
When DTR Delay=S25 (AT
*
DT), and AT Form=Sync Data (AT&M) or V25
Form=AsynSync, the modem goes into synchronous data mode after the modem
dials asynchronously. S-Register 25 lets you switch from an asynchronous DTE to a
synchronous DTE without hanging up. S-Register 25 allows this switch by
specifying how many seconds the modem waits after connecting before looking for
DTR.
S-Register 26—RTS/CTS Delay
This S-Register selects the delay between CTS and RTS while the modem is online.
It operates in modes specified by the RTS (AT
*
RS) and CTS (AT
*
CT) commands.
The time is selectable in 1/100 second intervals, from 0 to 2.55 seconds.
S-Register 30—DTE Inactivity Disconnect
If DTE Inactivity=S30 (AT
*
SI), the modem disconnects when data is not sent or
received for an amount of time greater than the value stored in S-Register 30,
multiplied by 10 seconds. Time-outs range from 10 to 2550 seconds (42.5 minutes).
A value of 0 stored in S-Register 30 disables the DTE inactivity option.
Stored in Nonvolatile Memory?: Yes
Status-Only?: No
Default:
5
Range:
0 to 255 (seconds)
Stored in Nonvolatile Memory?: Yes
Status-Only?:
No
Default:
1
Range:
0 to 255
Stored in Nonvolatile Memory?:
Yes
Status-Only?:
No
Default:
0
Range:
0 to 255 (x 10 seconds)