Multi-Tech Systems MT2456SMI22 manual S0 Number of Rings to Auto-Answer, S1 Ring Counter

Chapter 4 - V.22bis Commands

S-PARAMETER DEFINITIONS

S0 - Number of Rings to Auto-Answer

S0 sets the number of the rings required before the modem automatically answers a call. Setting this parameter to zero disables auto-answer mode.

Range: 0-255 rings

Default: 0

S1 - Ring Counter

S1 is incremented each time the modem detects a ring signal on the telephone line. S1 is cleared if no rings occur over an eight second interval.

Range: 0-255 rings

Default: 0

S2 - Escape Character

S2 holds the decimal value of the ASCII character used as the escape character. The default value corresponds to an ASCII '+'. A value over 127 disables the escape process, i.e., no escape character will be recognized.

Range: 0-255, ASCII decimal

Default: 43 (+)

S3 - Carriage Return Character

S3 sets the command line and result code terminator character. Pertains to asynchronous operation only. Range: 0-127, ASCII decimal

Default: 13 (Carriage Return)

S4 - Line Feed Character

S4 sets the character recognized as a line feed. Pertains to asynchronous operation only. The Line Feed control character is output after the Carriage Return control character if verbose result codes are used.

Range: 0-127, ASCII decimal

Default: 10 (Line Feed)

S5 - Backspace Character

S5 sets the character recognized as a backspace. Pertains to asynchronous operation only. The modem will not recognize the Backspace character if it is set to a value that is greater than 32 ASCII. This character can be used to edit a command line. When the echo command is enabled, the modem echoes back to the local DTE the Backspace character, an ASCII space character and a second Backspace character; this means a total of three characters are transmitted each time the modem processes the Backspace character.

Range: 0-32, ASCII decimal

Default: 8 (Backspace)

S6 - Wait Time before Blind Dialing or for Dial Tone

S6 operation is country dependent.

1.Sets the length of time, in seconds, that the modem will wait before starting to dial after going off-hook when blind dialing. This operation, however, may be affected by some ATX options according to country restrictions. The “Wait for Dial Tone” call progress feature (W dial modifier in the dial string) will override the value in register S6. (U.S.)

2.Sets the length of time, in seconds, that the modem will wait for dial tone when encountering a “W” dial modifier

before returning NO DIAL TONE result code. (Other countries.)

The modem always pauses for a minimum of 2 seconds, even if the value of S6 is less than 2 seconds. Range: 2-255 seconds

Default: 2

S7 - Wait Time for Carrier, Silence, or Dial Tone

S7 operation is country dependent.

1.Sets the length of time, in seconds, that the modem will wait for carrier before hanging up. The timer is started when the modem finishes dialing (originate), or 2 seconds after going off-hook (answer). In originate mode, the timer is reset upon detection of answer tone if allowed by country restrictions.

2.Sets the length of time, in seconds, that modem will wait for silence when encountering the @ dial modifier before continuing with the next dial string parameter.

3.Sets the length of time, in seconds, that the modem will wait for dial tone when encountering a “W” dial modifier

before continuing with the next dial string parameter. (U.S.) Range: 1-255 seconds

Default: 50

Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide 37