Notes: Some software allows these commands to be added to the list of dial prefixes or the initialization string.
When the protocol is forced, the modem will not attempt to connect at other protocols if it cannot connect at the forced protocol. It will try to connect at the fastest speed available within the forced protocol.
There are other configurations that can be forced as well. If you need to select a particular configuration, use the AT command strings shown below. You can always return to the modem’s default configuration by typing AT &F and pressting the Enter key.
Remember that if you do this, the modem will not have received the commands in your software’s initialization string as it normally would. Using the ATZ command overcomes this problem if you have saved all of your setup parameters in nonvolatile memory. (To save setup parameters in nonvolatile memory in AT terminal mode: Type AT, followed by the parameter settings you desire, followed by &W, and press Enter. For example, if you type AT &C1 &D2 &W and press Enter, the &C1 and &D2 parameter settings are stored.)
To force | Type command & press |
| Enter |
MNP 5/MNP 4 operation | AT \N5 |
LAPM only (V.42) | AT \N4 |
MNP 4 only | AT \N5%C0 |
V.42bis data compression | AT+DS=3 |
V.44 data compression only | AT+DS44=3 |
ATS0=1 |
Problem: | Your V.92 modem does not connect reliably |
| at V.92. |
Solution: | First be sure that you have the latest modem |
| firmware downloaded from our Web site. Also |
| make sure that your ISP offers V.92 at the |
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