COMSPHERE 3800Plus Modems
8-36 October 1998 3980-A2-GB30-40
Table 8-6
(4 of 8)
V.42/MNP/Buffer Configuration Options
V42bis Compress: Enable
Nxt Enable Disable
This configuration option only appears when Async/Sync Mode is configured for Async.
V.42bis Compression. Enables or disables V.42bis data compression.
Enable – Data compression operates in both the transmit and receive directions. This is the recommended setting for all
applications.
Disable – V.42bis data compression is disabled. This is rarely needed because V.42bis data compression does not
cause data expansion for compressed data.
The factory default is Enable.
NOTE: This configuration option is only available if Error Control Mode configuration option is set for V42/MNPorBfr or
V42/MNPorDsc.
AT command equivalent is ″H
n
.
MNP5 Compress: Enable
Nxt Enable Disable
This configuration option only appears when Async/Sync Mode is configured for Async.
MNP5 Compression. Determines if the modem uses MNP Class 5 data compression. It can be set independently of
V.42bis data compression. Online changes do not take effect until a disconnect occurs.
The factory default is Enable.
NOTE: This configuration option is only available if Error Control Mode configuration option is set for V42/MNPorBfr,
V42/MNPorDsc, MNP or Buffr, or MNP or Disc.
AT command equivalent is %C
n
.
EC Negotiat Bfr: Disable
Nxt Disable Enable Disab&Switch
This configuration option only appears when Async/Sync Mode is configured for Async.
Error Control Negotiate Buffer. Determines if the answering modem buffers the data that it received from the remote
modem during an interval in which the modem attempts to establish a connection using error control. Online changes do
not take effect until a disconnect occurs.
Disable – Data is not buffered during the link negotiating (handshaking) sequence.
Enable – Data is buffered while the link is being established. Initialization data is not passed on the DTE during the
handshaking sequence.
Disable and Switch – Data is not buffered during the handshaking sequence. However, when the modem receives an
error control fallback character, it switches to Buffer mode. (See EC Fallback Char configuration option.)
The factory default is Disable.
AT command equivalent is \C
n
.