DCE-to-DCE Communication

DTE data enters the sending modem via the TxD pin. When DTE sends data to a DCE and the sending modem's buffer is nearly full, a DCE can control flow (via hardware) by lowering the CTS signal. This way, the DTE knows not to use TxD.

Data is compressed. At the data compression stage, the sending and receiving modems agree on the compression algorithm. A standard MNP 5 or V.42bis algorithm is used.

Data is packetized. The following tasks are performed:

Data is modulated from digital into analog signals.

Data is sent over the telephone network.

The signal is demodulated.

The data is depacketized.

The data is decompressed.

The data is delivered to the destination DTE.