USRobotics V.34 - Manual (Page 48)

COURIER HIGH SPEED MODEMS
Data Mode Operations 4-11
Returning Online
O n If DIP switch 9 is ON (on detection of the escape code the
modem maintains the connection), you can issue commands
and then toggle the modem back online with the O
n command,
as in this example:
AT Q1 O
There are two ways to return online.
ATO0 Return online (normal). (Used in the example above.)
ATO1 Return online and retrain. Use to have the modem re-
synchronize if there were errors in a non-ARQ data
transfer.
Hanging Up
If DIP switch 9 is ON, the escape code forces the modem back to
Command mode but leaves the line open. If you want the
modem to hang up, issue the following command once the
modem sends the OK result code:
ATH
If DIP switch 9 is OFF, the modem automatically hangs up on
receipt of the escape code.
SETTING/USING DEFAULTS
The modem's read-only memory (ROM) permanently stores the
modem's four factory template settings. Nonvolatile random
access memory (NVRAM) allows you to save one of these four
templates, or add your own modifications, and write all the
settings to NVRAM as your power-on defaults.
&F n The modem is shipped with four configurations (templates),
&F0
− &F3, stored in permanent nonprogrammable memory
(ROM). Appendix B includes configuration listings for each
template. Any one of the templates may be loaded into current
memory (AT &F
n) or written to nonvolatile memory to serve as
the reset default (AT &F n &W). Note, however, that &F0 is
always loaded into memory if DIP switch 10 is ON.