Total Control MP/16, Operator'S Manual

Page: 129 / 182

AT Command Reference D-5
Equalization Long/Short: Status of S15 bit 0; long if bit 0=0, short if
bit 0=1.
Fallback: Enabled/Disabled: indicates whether or not the modems
negotiated online fallback during the con nection sequence.
Protocol: Indicates the error control protocol negotiated (LAPM,
MNP, NONE) or SYNC for a synchronous call.
Speed: The last rates at which the receiver/transmitter were
operating before disconnecting.
Disconnect Reason
Possible reasons for disconnect are as follows, displayed in the I6
screen:
Keypress Abort:
The modem detected a keypress while training.
DTR dropped:
The DTE dropped the Data Terminal Ready signal,
terminating the call.
Escape code:
The operator sent the modem the +++ escape code.
GSTN (General Switch Telephone Network) Clear Down:
The
connection was non-ARQ and DTR was dropped from one
side of the connection, or the DISC frame was corrupted due
to noise.
Loss of carrier: The modem detected loss of the remote modem’s
carrier and waited the duration specified in Register S10
(default is 0.7 seconds).
Inactivity timeout: The modem detected no activity on the line for
the duration specified in Register S19 (default is 0, timer
disabled).
MNP incompatibility: The modem is set to &M5 and the remote
modem does not have MNP capability, or there was an MNP
negotiation procedure error.
Retransmit limit:
The modems reached the maximum of twelve
attempts to transfer a data frame without error.
LD received:
The remote modem sent an MNP error control Link
Disconnect request.
DISC:
The remote modem sent a V.42 Disconnect frame.