The following list describes the basic rules:
1. Never use the modem autoconfigure discovery command. Applying specific modemcaps reduces the risk of error.
2. Always use the modem autoconfigure type modem-name command. This command improves your modem's performance. See CSCdk15302 for an explanation.
The modem autoconfigure type mica command can be used to reset any integrated modem (not only MICA), back to its factory defaults. The keyword mica is a built-in modemcap that only functions as &F (return to defaults).
3. When you use the modem autoconfigure command, be sure that any script reset function is removed. A script reset is redundant and possibly harmful.
A script reset is a chat script that is applied to a line when the line resets. The modem autoconfigure function is applied when the system starts up, not just when the line resets.
4. When creating a modemcap, ignore all the strange and confusing fields. Put your modem init string into the MSC (Miscellaneous) field:
- Always start your init string with &F (or, for non-cisco modems, with the preferred &F1, &F2, etc.)
- Never put an &W into an init string. An &W can wear out the EPROM on modems where this is not a no op (that is, a statement or operation that does nothing).
- For MICA modems, always be sure that &D2 (not &D3) is in effect. See CSCdk15260 and CSCdk15302 for an explanation.
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