User guide

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Chapter 5 - AT Commands
dialing. If no connection is established during the specified time, the TA ends the call. The
INS64 switch type limits the maximum delay time to 50 seconds or less. All other switch
types allow up to 255 seconds of delay.
S8 Pause Time for Comma
Unit: 1 second
Range: n=0-255
Default: 2 (= 2 seconds)
S8 sets the length of the pause caused by a comma inserted in a dialing command. The
default setting is 2 seconds, where each unit is one second. S8 may be set for up to 255
seconds.
S10 DCD Drop Time
Unit: 50 ms
Range: 0–254, 255
Default: 20
Sets the amount of time the DCD signal will be dropped when a call is disconnected if the
DCD signal is configured for a momentary drop on disconnect (&C2)
S25 DTR Drop Time
Unit: 100 ms
Range: 0, 1–255
Default: 5
Sets the time that DTR must remain low before the TA disconnects. The S25 unit value for 0 is
40 ms. For values from 1 through 255, the unit value is 100 ms.
S29 On-line Inactivity Timer Period
Usage: S29=n; S29?
Unit: 0.25 seconds
Range: n=0--does not disconnect
n=1-255 (0.25-63.75 seconds)
Default: 240 (60 seconds)
S29 sets the on-line inactivity timer period and affects the on-line inactivity timer S30 by
adjusting its unit of time. For example, this allows the inactivity of data calls to be timed down
to 0.25 seconds and if no data is received within 0.25 seconds the data call will disconnect.
This is useful for quick connect-disconnects or for continuous connect-disconnect cycles when
combined with the use of Persistent DTR Dialing (PDD). By default the period is 60 seconds
(1 minute).
S30 On-line Inactivity Timer
Unit: 1 minute
Range: n=0 Does not disconnect
n=1–255
Default: 0 (does not disconnect)
Makes the TA disconnect a data connection if no data is transmitted or received for the
specified time. It will NOT cause a POTS call (voice/modem/fax) to disconnect. The timer
restarts any time a data character passes through the serial port (either sent or received).
Disable the inactivity timer by setting S30=0, which is the factory default setting. S30
currently works for + all protocols.