Multi-Tech Systems MT3334HD8 manual S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD

4 S-Registers

S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD

Unit: 50 ms

Range: 0–255

Default: 20 (1 second)

Some PBX and CBX phone systems require the modem’s DSR, CTS, and/or CD signals to drop briefly when calls are disconnected. The MT3334HD8’s &R, &S, and &C commands can cause the modem to drop these signals for a specified time upon disconnect, and then bring the signals up again. S24 defines the length of time that the signals drop. The default setting of 20 results in a one-second drop time, which is what most PBX/CBX systems with this requirement need.

S25 DTR Dropout Time

Unit: 100 ms

Range: 0, 1–255

Default: 0 (50 ms)

S25 sets the amount of time that DTR must be dropped before the modem disconnects. Typically, a disconnect occurs when DTR is dropped for 50 milliseconds or more. This dropout time can be increased up to a maximum of 25.5 seconds. The S25 unit value for zero is 50 ms. For values from 1 through 255, the unit value is 100 ms.

S30 Inactivity Timer

Unit: 1 minute

Range: 0, 1–255 minutes

Default: 0 (disabled)

S30 can be used to cause the modem to disconnect if no data is transmitted or received for a specified time. S30 runs during both reliable and non-error correction connections. The timer restarts any time a data character passes through the serial port (either sent or received). If noise on the phone line causes an error to be received during non-error correction mode, this also will restart the S30 timer. The factory default of zero disables the timer.

S32 Time Lapse for Escape Sequence

Unit: 100 ms

Range: 0–255

Default: 20 (2 seconds)

S32 sets the time period to validate the escape sequence. If the S32 time interval expires before you press ENTER, then the escape sequence is aborted. The default is two seconds.

S34 Command Buffer Length After Online Escape Sequence

Unit: Decimal

Range: 0–60

Default: 10

Sets the number of characters allowed in an AT command after an in-band online escape (+++ method). If the number of characters after “AT” exceeds the S34 buffer length value, then the buffer is flushed and the escape sequence is aborted.

S36 DTR Busy-Out Time

Unit: 1 second

Range: 0–255

Default: 0 (disabled)

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