Specifications

ISU AT Command Reference Phase I AT Commands
Iridium Proprietary Version 2.45
20 June 2011 22
Any value for n is accepted.
5.29 &Jn - Jack Control
Control the telephone jack configuration.
No action, compatibility only.
Allowed values for n are 0 and 1.
5.30 &Kn - Flow Control
Select the flow control method between the ISU and DTE.
0 Disables flow control.
3 Enables RTS/CTS flow control (default).
4 Enables XON/XOFF flow control.
6 Enables both RTS/CTS and XON/XOFF flow control.
5.31 &Ln - Leased Line Operation
Request leased line or dial-up operation.
No action, compatibility only.
Any value for n is accepted.
5.32 &Mn - Asynchronous/Synchronous Mode
Select the DTR operating mode.
0 Selects normal asynchronous operation (default). (See &Q0.)
5.33 &Pn - Pulse Dial Make/Break Ratio
Select the make/break ratio during pulse dialing.
No action, compatibility only.
Allowed values for n are 0, 1, 2 and 3.
5.34 &Qn - Sync/Async Mode
Select asynchronous mode. This is an extension of the &M command and is used to control the connection
modes permitted.
Note: The register is not updated right after the user requests new values because the requested values may
or may not be what IRLP will use once a data call is established due to negotiations with the other peer. If
the register is updated right away, this may give the user the impression that those values will be used
during the data call, but there is no guarantee that will be the case. The real values will only be known once
a data call is established and the negotiation phase is done. For that reason, the values are written to the
register only after a call is established and both sides have negotiated parameter values (such as mode of
operation). The value of the register will be reset to default value (5) after the call completed.