Technical information

Table Of Contents
RS232 Multiplexer Feature
3-346 AT Commands Reference Manual January 31, 2007
UART Flow Control
The following sections describe UART flow control in the MUX.
UART Hardware Flow Control
G24 supports automatic UART hardware flow control.
UART Software Flow Control
Software flow control at the physical UART level is supported while MUX is in advanced mode.
It is not supported in basic mode.
MUX UART Port Speed
Auto baud rate detection is disabled in the MUX. To set the UART baud rate, the G24 uses the
<port speed> parameter in +CMUX command. If the parameter is absent, the MUX uses the same
baud rate that was in PREMUX state.
Power Control
Services
Includes both sleep and wakeup services. This service will be supported in future
versions.
DLC Release
Services
Used to disconnect a DLC exclude control channel (DLCO).
Close Down
Services
(CLD, DISCO,
Exception
situations)
Used to terminate multiplexer operation on the serial channel and resume GRLC
operation (returns to PREMUX state).
Control
Services
Includes services at the MUX entity level and at the specific DLC level.
MUX Entity Level services (channel 0):
Test Service used to test the communication link between two MUX entities.
Specific DLC Level services (all DLC except 0):
1. A specific DLC HW modem status is reflected by logical (SW) means. A Modem
Status Command (MSC) is used to control specific DLC modem signals, as a
substitute for the HW lines in PREMUX. Initial values are expected to mirror the HW
values in PREMUX.
Note: The MSC break signal, M_FC, D_FC, RTS, CTS are not supported.
2. "Non Supported Command" response: NSC frame
Unsupported
Control
Services
PN, RPN, RLS, SNC (27.010 options)
Service Description