Specifications

<C#>-2 V.3229 / V.3229L

rotocols

When a LAPM or MNP link is established the mo-

dem is in reliable mode. V.42 bis allows negotiation

with a remote modem to the highest level of protocol

common to both units. Both LAPM and MNP control

data errors by retransmitting any block of data that

was corrupted in transit. LAPM is assigned highest

priority and if not supported, then an MNP connec-

tion is attempted.

AUTO-RELIABLE

In auto-reliable mode the modem negotiates to the

highest protocol (LAPM or MNP) common to both

modems. However, if a reliable connection cannot

be established, auto-reliable allows the protocol to

fallback to normal mode.

CONSTANTSPEED

INTERFACE

The modem serial port adapts to the data rate of the

DTE and does not change speed if the modem tele-

phone line connects at another speed. Therefore the

DTE to DCE interface speed is constant.

DATA

COMPRESSION

Using MNP Class 5 data compression, the modem

can achieve data throughput approaching 28800 bps.

With LAPM data compression, the modem can

achieve data throughput approaching 57600 bps.

This increase in speed is achieved by automatically

analyzing the data stream and reducing the number

of bits required to represent the characters. 100%

error-free transmission is assured by the application

of the MNP or LAPM error control protocol on the

compressed data.

Compression takes place only if the modem detects