Compaq Armada 1500 Compaq Armada 1500 Family of Personal Computers Maintenance - Page 181

Table C-4 Dial Modifiers Modifier Description L Redial Last Number. L instructs the modem to redial the last number dialed since power was applied to the system. This should be the first command after ATD; otherwise, the modem ignores the command. P Pulse Dialing. P instructs the modem to use pulse dialing until tone dialing (T) is selected. S=n Dial Stored Number. S=n instructs the modem to dial a telephone number previously stored using the &Zn=number command. The range of n is 0 - 3. T Tone Dialing. T instructs the modem to use tone dialing until pulse dialing (P) is selected. Tone duration and spacing are set by the S11 register. W Wait for Dial Tone. W causes the modem to wait up to a specified time for the dial tone to occur. The telephone number is dialed immediately upon dial tone detection. This may be helpful when dialing through a PBX or for some long-distance services. The maximum wait period is set in register S7. ; (semicolon) Return to Command Mode. The semicolon (;) forces the modem to remain in the command state after dialing a number without disconnecting. The semicolon must be placed at the end of the dial command. @ (at character) Wait for Quiet Answer Command. The at character, @, causes the modem to look for rings followed by seconds of silence before processing the next symbol in the dial string. The S7 register determines the maximum wait time. If a quiet answer is detected, the dial modifiers following the command are executed. If a busy signal is detected, the modem returns a BUSY result code and undergoes the hang-up process, aborting further execution of commands. ! (exclamation) Flash Hook Command. The exclamation point, (!), causes the modem to go on-hook for 0.5 seconds and then return to off-hook. Used by some PBX systems to access special features such as call forwarding and call transfer. , (comma) Pause During Dialing. The comma (,) causes the modem to pause for a specified time during dialing. The duration is set by register S8. ^ (carat) Disable Data Calling Tone Transmission. This command takes effect for the current call only. NOTE: This command is not available in some countries. > (greater than) Ground Start Dialing. NOTE: This command is not available in some countries. 0 through 9 Dial Digits. Valid digits for pulse or tone dialing. A, B, C, D, #, * Dial Characters. Valid characters for tone dialing only. A, B, C, and D are four keys added to the right of the 369# keys for Dual-Tone Multifrequency systems. NOTES Telephone numbers (dial strings) may be entered with or without spaces or other punctuation. T and P modifiers are allowed anywhere in the dial string; therefore, signaling methods may be changed in some countries after several digits are sent, if allowed in your country. Modem Commands C-11