User`s guide

ManualsBrandsZhone ManualsComputer equipment3821Plus

COMSPHERE 3821Plus Modem

3-40 January 1999 3821-A2-GB20-40

Table 3-9

(2 of 5)

V.42/MNP/Buffer Configuration Options

V42bis Compress: Enable

Nxt Enable Disable

This configuration option only appears if Async/Sync Mode is configured for Async and the Error Control Mode

configuration option is set for V42/MNPorBfr or V42/MNPorDsc.

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.

AT command equivalent is ″H

MNP5 Compress: Enable

Nxt Enable Disable

This configuration option only appears if Async/Sync Mode is configured for Async and the Error Control Mode

configuration option is set for V42/MNPorBfr, V42/MNPorDsc, MNP or Buffr, or MNP or Disc.

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.

AT command equivalent is %C

EC Negotiat Bfr: Disable

Nxt Disable Enable Disab&Switch

This configuration option only appears if 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 to 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 Fallbck Char configuration option.)

The factory default is Disable.

AT command equivalent is \C

EC Fallbck Char: 013

Nxt  013 ASCI

This configuration option only appears if Async/Sync Mode is configured for Async and EC Negotiate Buffer is

configured for Disab&Switch.

Error Control Fallback Character. This configuration option allows you to enter the ASCII value of the error control

fallback character. This provides the remote modem with the ability to end the error control link negotiating (handshaking)

sequence by sending this character. The modems will connect in Buffer mode (no error control). Online changes do not

take effect until a disconnect occurs.

When the modem receives this fallback character it switches to Buffer mode and transmits an EC fallback character to

the DTE. When comparing incoming characters for a match against the EC fallback character, the modem ignores parity.

The factory default is 013.

AT command equivalent is %A