ATCommands
variable speed mode.
\N3 selects V.42/MNP
Your modem supports special CONNECT messages for connections made with either reliable or
When the AT\V0 command is issued (default), your modem will generate standard CONNECT messages for both normal and
☞Issue the %U1 command if you want your modem to issue CONNECT/
The \V9 command will display details of the error correction and data compression negotiated with the remote modem as well as diagnostic information. This information is displayed immediately before the CONNECT message.
Improving Performance with MNP 10
MNP 10 is neither an error correction or data compression technique. MNP 10 works in conjunction with error correction and data compression to improve the performance of your modem when operating with poor or varying quality telephone lines (as sometimes found with overseas or cellular telephone connections).
With MNP 10 operating, your modem can automatically resize the MNP packets, depending upon the line quality. When an MNP connection is established, data is transferred in small ‘chunks’ known as packets. When the line quality drops, MNP 10 reduces the size of packets being transferred in order to maintain data throughput. MNP 10 will increase the packet size to take advantage of improved line quality.
If the line quality becomes very good or very bad, MNP 10 can automatically step between line speeds. MNP 10 attempts to use the highest speed applicable to the quality of the telephone connection. If the telephone line quality drops while you are connected to another MNP 10 modem, thus introducing errors into your data, and the smallest packet size is being used, the modems will
Similarly, if the line quality improves and the modems are using the largest packet sizes, the modems will
MNP 10 will also make multiple attempts at establishing an
Page 31
