Multi-Tech Systems MT5600DSVD - Manual (Page 48)

MultiModemDSVD User Guide 4 AT Commands, S-Registers, and Result Codes
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6 Reserved.
7 An MNP connection is attempted and
if it fails, a normal modem connection
is established.
S37 decimal 0 0 Sets the maximum V.34 speed at which the
modem attempts to connect. The default
value is an automode connection. If N0 is
active, connection is attempted at the most
recently sensed serial port speed (+MS=
command settings are updated to the ap-
propriate values). If N1 is active, connec-
tion is attempted at the highest possible
speed. (+MS= settings are updated to
11,1,300,3360 to reflect V.34, automode,
300 bps minimum speed, and 33600 bps
maximum speed). Supported only for
compatibility with existing software; use
the +MS= command instead.
S38 seconds 0–254, 255 20 Sets the delay between the modem’s receipt
of the H command to disconnect (or high-
to-low transition of DTR if the modem is
programmed to follow the signal), and the
disconnect operation. Applies only to error-
correction connections. This register can be
used to ensure that data in the modem buff-
er is sent before the modem disconnects. If
S38
is set to a value between 0 and 254, the
modem waits for the remote modem to ac-
knowledge all data in the modem buffer
before disconnecting. If S38 is set to 255, the
modem does not time out, and continues to
attempt to deliver data in the buffer until
the connection is lost or the data is delivered.
S46 decimal 136, 138 138 Enables or disables data compression:
136 Error correction without compression.
138 Error correction with compression.
S48 decimal 0, 7, 128 7 Enables or disables LAPM negotiation. An
invalid value is treated as a 128 value.
0 Disables negotiation and proceeds
with LAPM.
7 Enables negotiation.
128 Disables negotiation and proceeds at
once with the fallback action specified
in S36. Can be used to force MNP.
Register Unit Range Default Description