Multitech MMH900, User Manual

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Appendix J - Internal MMH2834 Composite Link Modem Commands
Long Space When two modems are connected in Normal mode (i.e.
Disconnect withouterror correction) there is no "polite" means of
Y requesting a disconnect. A link disconnect request packet is sent
under reliable connections. As a result some "garbage" may be
received when a hangup command is issued. The Y1 command
enables the modem to use the break signal which accomplishes
the hangup as an instruction to shut off its receiver and disconnect
(both modems must have Y1 enabled for this feature to be
effective). Y0 (factory default) disables this function.
Wait for New A W inserted in the dialing command causes the MMH2834
Dial-Tone towait for another dial tone, and not resume dialing until another
dial tone is detected. It is not necessary to enter a
W W at the beginning of the dialing command to wait for a modem
dial tone, because the modem will do that first (pause
automatically).
In order for this command to work, you must select Wait-For-Dial
Tone dialing with the X2 or X4 command, so that your modem
will be able to detect the dial tone.
Reverse the In certain operations you may need to reverse the mode of
Mode of operation for your modem from originate to answer or
Operation answer to originate so that it would answer the phone and
go into answer mode. This command turns off the reversing
R function with the R0 command and turns it on with the R1
command with the modem in either command mode. If you want
to reverse from the originate mode, use R (with no number) in the
dialing string.
Flash On Hook Some switchboard systems react to a momentary On Hook. An
exclamation mark inserted in the command causes the
! modem “flash” on hook for a half of a second (90 mSec in BABT),
as if you had held the switch hook button on a telephone down
for a half second.
For example, to flash On Hook after dialing the number 555-
1234 in order to transfer to Extension #5678, you might enter
ATDT5551234,,!5678. The commas cause a 4 second pause
(just to be safe).
"Calling Card" The MMH2834 has the capability to detect AT&T ""calling
Detect Tones card'' tones for the purpose of utilizing the user's calling card
number to originate an on-line connection. An $ symbol
$ placed in the dialing string causes the modem to pause and wait
for an AT&T "calling card" or a 1600 Hz tone (prevalent in the
United Kingdom). When the tone is detected, the rest of the
dialing string is processed. If no tones are detected within 45
seconds the modem aborts by indicating a NO CARRIER