NAME

asyhdlc − Asynchronous HDLC protocol module

SYNOPSIS

asyhdlc

DESCRIPTION

The asyhdlc module is pushed on a tty stream attached to an asynchronous serial line so that PPP may use that line to transmit and receive IP datagrams. 

A PPP HDLC packet lacks a CRC checksum and uses a “transparent code” for data transmission.  asyhdlc performs the following functions on PPP datagrams:

generates and validates the CRC checksum

encodes and decodes packet data to achieve data transparency - charater stuffing

generates and strips framing patterns delimiting packet start and end

See ppp(7) for additional information about the PPP implementation. 

SEE ALSO

ppp(7)
RFC 1171