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Appendix F - MMH2834 Modem Commands
TERSE VERBOSE
0OK
1 CONNECT
2 RING
3 NO CARRIER
4 ERROR
5* CONNECT 1200
6 NO DIALTONE
7 BUSY
8 NO ANSWER
9* CONNECT 2400
11* CONNECT 4800
12* CONNECT 9600
13* CONNECT 14400
19* CONNECT 19200
21* CONNECT 21600
24* CONNECT 24000
26* CONNECT 26400
28* CONNECT 28800
* When error correction is used, the word RELIABLE (verbose) or the letter R (terse) is added to
these responses. When data compression is used, the word COMPRESSED (verbose) or the
letter C (terse) is added to these responses
Result Codes (Verbose/Terse) V
The V command controls whether the MMH2834's result MMH2834’s result codes are displayed
as word (“verbose”) or single digit (“terse”) messages.
For example, if after dialing, no carrier signal is detected, the resulting message can be
displayed either as NO CARRIER, or as the digit 3.
Entering ATV0 (or ATV) causes the MMH2834 to display the Result Codes as digits, while ATV1
displays them as words. If you do not select a method, the factory default setting causes the
modem to display Result Codes as words.
Result Codes (Basic and Extended) and Call Progress Selection X
The X Command is used to select one of two possible dialing methods ("dumb or "smart"), and to
select various response combinations related to these methods. You can choose to have certain
responses suppressed, or whether or not you want speed indications along with the CONNECT
responses. You can also pick and choose certain responses in order to match up with “Standard
AT” responses.
The MMH2834 provides Basic and Extended Result Code sets. The difference between the two
is the Basic set provides one response (CONNECT) to indicate a connection, while the Extended
set provides several responses for different speeds (CONNECT, CONNECT 2400, CONNECT
4800, CONNECT 9600, CONNECT 14400 CONNECT 19200, CONNECT 21600, etc.).
When the Extended set is chosen, you also have the option of matching them up with Standard
AT 2400 response code sets, by including or not including the BUSY and/or NO DIAL TONE
responses while excluding the DIAL TONE response. The X command is used to select which
responses are provided.
Regarding the MMH2834’s method of dialing, the MMH2834 can detect standard dial tones and
busy signals. This capability (“smart dialing”) allows the modem to wait for a dial tone, and when
one is detected, to begin dialing immediately.