Multitech MT2834MR Owner's Manual page 89

PN 88300150
LSDmm;dd...dd
LSFmm;dd...dd
CON ssss
V.25bis AT Commands
The AT commands associated with V.25bis mode are described as follows. Note that one command
enables and disables V.25bis mode and the rest are only operable in the V.25bis mode.
Enable/Disable V.25bis Mode ($V) Command
The function of the $V command is to select the V.25bis mode in asynchronous mode. (Synchronous
mode is set up with switches. For example, the modem could be in AT command mode, (AT$V1), and if
synchronous mode is enabled with AT Command mode enabled, then V.25bis mode is selected). Prior to
executing this command, make sure that your modem is properly set up to perform the type of operation
you are performing. Refer to the initialization section of this appendix for information about modem set-up.
When in V.25bis mode, most normal AT commands also function (except D,N,O and U). V.25bis
operates in asynchronous or synchronous modes (depending on the position of 4-Position DIP-Switch
#4), and does not check for terminal speed (so do not change speeds while in this mode) or parity. In
synchronous mode, speed is not important since the internal clocks provide synchronization.
To place your modem in V.25bis mode from asynchronous mode, enter the AT$V1 command. To return
to AT command mode, enter the AT$V0 command. AT$V2 allows you to run one V.25bis command from
AT command mode without leaving AT command mode (the V.25bis command follows $V2 on the
command line).
Clear Number in Memory (CLA) Command
The CLA command clears a specific number in the mm phone number memory by entering CLAmm.
Change Serial Baud Rate (CSP) Command
The CSP command changes the serial baud rate of your modem by entering CSPsssss where sssss
can equal:
0300 = 300 bps
1200 = 1200 bps
2400 = 2400 bps
4800 = 4800 bps
9600 = 9600 bps
19200 = 19200 bps
38400 = 38400 bps
57600 = 57600 bps
115200 = 115200 bps
Dial Phone Number Provided (CRN) Command
The CRN command permits the dialing of the phone number immediately following it (from the command
line). It is similar to the D command of the AT command set, except that the number is first checked
against the Delayed Number and Forbidden Number list. If permitted, depending on the country
regulations in effect, the number is then dialed. For example, if you type CRN7859875 and hit ENTER,
your modem checks the two lists. If the number is on the Delayed Numbers list, you can dial that number
again after t minutes have passed. If the number is on the Forbidden list, a CFIFC message is displayed.
You can use various commands from the AT command set within the CRN command line to facilitate the
dialing process, such as P, T, or W for pulse dialing, tone dialing and wait for dial tone. V.25bis supports
"smart" dialing.
To dial a phone number, type CRNdd...dd where dd...dd is the phone number, which can be up to 20
characters long using any character on the telephone pad (0 through 9, *, #, P, T, and :).
Some additional dialing characters may be available, based on country regulations.
4/3/01
Phone number on the Delay list
Phone number on the forbidden list
Connection at ssss speed (if X1 in effect)
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