Modem Commands
Attention String:Enter the modem command string for initializing the modem. This string is used to prepare the modem to call out and precedes the dialing of the phone number. The direct connection procedure in ClockWatch expects that the modem respond with OK after each modem command is issued.

It is important that both flow control and data compression be disabled to allow the modem to read the string output by the timeserver.  The extended Hayes command code to turn off flow control is commonly &K0  and/or  \Q0 and to disable MNP data compression %C0, check your modem documentation for the actual codes. 

A value for the field is optional. The default value for the attention string is ATZX3

Dial String: Enter the modem command string to dial out. The default value is ATDT
Hint: To use pulse dialing change the dial string to ATDP
Hang-up String: Enter the modem command string to hang-up the modem after communication is finished. The default value is ATH
Hint: You can use a terminal program such as HyperTerminal (a standard Windows accessory) to verify the modem is installed properly and the commands sent to the modem are correct. Configure HyperTerminal to open the same com port the modem is using  (but not the modem itself) and type in the same command strings that are used to see if the modem responds.

Dialing
Dial Prefix: Enter the dialing prefix (if any) required to dial out. This digit is dialed before the NIST phone number is dialed.  If you include commas ',' in the string then the dialing will pause a period of time for each comma in the string. There is no default value.
NIST Phone Number:Enter the phone number of the NIST ACTS modem. The default value is the NIST in Boulder, Colorado, USA at 1-303-494-4774

Handshaking
Handshaking refers to the internal communications protocol implemented in the computer hardware by which data is transferred from the modem to the communications port.
RTS Enable: Determines whether to enable the Request To Send (RTS) line. Typically, the Request To Send signal that requests permission to transmit data is sent from the computer to the attached modem.
DTR Enable: Determines whether to enable the Data Terminal Ready (DTR) line during communications. Typically, the Data Terminal Ready signal is sent by a computer to its modem to indicate that the computer is ready to accept incoming transmission.
Handshaking Type: A handshaking protocol is used so data is not lost when data arrives at the communications port.
None:  No handshaking.
RTS: RTS/CTS (Request To Send/Clear To Send) handshaking.
Test Buttons
Open the Modem Test Screen to test the settings.