Maxim Integrated 73M2901CE AT Command - Manual (Page 12)

73M2901CE AT Command User Guide UG_2901CE_027
12 Rev. 2.0
2.12 K[n] – Flow Control
The K[n] command selects which flow control options are available when rate buffering.
K0
Flow Control Disabled (Default).
K3
RTS/CTS.
K4
XON/XOFF.
RTS/CTS flow control
2.13 L[n] – Fast Connect
The L[n] command enables the modem to perform 1200 Fast Connects.
L0
Disable Fast Connect (default).
L1
Disable 2100Hz answer tone and billing delay.
L2
2-second billing delay enabled with no 2100Hz answer tone.
L3
400ms answer tone and billing delay enabled.
2.14 N[n] – Data Set Ready Signal Control
The function of the
DSR line is determined by the N[n] command. n = 0 to 2.
N0
DSR is always ON (low).
N1
DSR off (high) in the idle state and when in a test mode. DSR circuit is turned on at start of the
handshaking process.
DSR is turned off when hang-up process is started.
N2 DSR off in the idle state and when in a test mode. DSR circuit is turned on at the end of
handshake after issuing the “CONNECT” result code.
DSR is turned off when hang-up process is
started.
1. Mode V.22bis, Protocol enabled (through S25), Extended result codes.
V.22bis
Connection
Carrier
Result
V.42
Detection
Protocol/Connect
Result
Data
Mode
DCD
DSR
CTS
When 15 or more bytes
are in the TX buffer
When 4 or less bytes
are in the TX buffer