If your voice modem offers caller ID support and you want Unimodem/V to use it, then you must add several items to an AddReg section of your INF file. Do not add these values to the Init key, but instead use the keys specified in the following.
You must add an EnableCallerID key to the registry. The value of the key is the command string Unimodem/V can send to your modem to enable caller ID support. For example, the SMPVOICE.INF file contains the following item:
HKR, EnableCallerID, 1,, "at#cid=1cr"
You can also specify characters your modem returns for caller ID information that is blocked because it is private or originates outside the area. For example, the SMPVOICE.INF file contains the following items:
HKR,, CallerIDPrivate,, "P"
HKR,, CallerIDOutSide,, "O"
Since the caller ID information returned by your modem is a variable-length string, you must specify the string terminator characters. For example, the SMPVOICE.INF file contains the following item:
HKR,, VariableTerminator,,