The Plain Text Chat Protocol is defined as a TCP-based application layer protocol that provides group communication without overhead. Any data received by the PTCP server from a client is broadcast to all other connected clients unaltered. In this sense it is similar to the Echo Protocol, except that it is many-to-many instead of one-to-one. The standard port number for PTCP is port 7034.
ptcpd is an implementation of the server-side PTCP component in Haskell. It
is currently in beta.
netcat is the recommended PTCP client.