Multi-Tech Systems MT2456SMI22 User Manual

Page 38

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Chapter 4 - V.22bis Commands

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

38

S8 - Pause Time For Dial Delay
S8 sets the time, in seconds, that the modem must pause when the “,” dial modifier is encountered in the dial string.
Range: 2-255 seconds
Default: 2

S9 - Carrier Detect Response Time
S9 is supported for backwards compatibility only. No value can be written. Responds with default value.
Range: 6 tenths of a second

Default: 6 (0.6 second)
S10 - Lost Carrier To Hang Up Delay
S10 sets the length of time (in tenths of a second) that the modem waits before hanging up after a loss of carrier. This
allows for a temporary carrier loss without causing the local modem to disconnect. When register S10 is set to 255,
the modem functions as if a carrier is always present. The actual interval the modem waits before disconnecting is
the value in register S10 minus the value in register S9. Therefore, the S10 value must be greater than the S9 value
or else the modem disconnects before it recognizes the carrier.
Range: 1-255 tenths of a second
Default: 14 (1.4 seconds)

S11 - DTMF Tone Duration
S11 operation is country dependent.
1. For U.S., S11 sets the duration of tones in DTMF dialing (has no effect on pulse dialing).
2. For other countries, S11 is a country parameter loaded via patch code.
Range: 50-255 milliseconds
Default: 95 (95 milliseconds)

S12 - Escape Prompt Delay (EPD)
S12 defines the maximum period, in fiftieths of a second, allowed between receipt of the last character of the three
escape character sequence from the DTE and sending of the OK result code to the DTE. If any characters are
detected during this time, the OK will not be sent. Sending of the OK result code does not affect entry into command
mode.
Range: 0-255 1/50 of a second
Default: 50 (1 second)

S14 - General Bit Mapped Options Status
S14 indicates the status of command options.
Default: 138 (8Ah) (10001010b)

Bit 0 This bit is ignored.
Bit 1 Command echo (En).

0 = Disabled (E0).
1 = Enabled (E1). (Default)

Bit 2 Quiet mode (Qn).

0 = Send result codes (Q0). (Default)
1 = Do not send result codes (Q1).

Bit 3 Result codes (Vn).

0 = Numeric (V0).
1 = Verbose (V1). (Default)

Bit 4 Reserved.
Bit 5 Tone (T)/Pulse (P).

0 = Tone (T). (Default)
1 = Pulse (P).

Bit 6 Reserved.
Bit 7 Originate/Answer.

0 = Answer.
1 = Originate. (Default)

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