User`s guide

Introduction

Point-to-Point Protocol (PPP)

The Point-to-Point Protocol (PPP) transports multi-protocol packets over point-to-point links. PPP

encapsulates the data packet, allows the server to inform the dial-up client of its IP address (or

client to request the IP address), authenticates the exchange, negotiates multiple protocols, and

reassembles the data packet for network communication.

Advanced Digi Discovery Protocol (ADDP)

The Advanced Digi Discovery Protocol (ADDP) runs on any operating system capable of sending

multicast IP packets on a network. ADDP allows the system to identify all ADDP-enabled Digi

devices attached to a network by sending out a multicast packet. The Digi devices respond to the

multicast packet and identify themselves to the client sending the multicast.

ADDP communicates with the TCP/IP stack using UDP. The TCP/IP stack should be able to

receive multicast packets and transmit datagrams on a network.

Not all Digi devices support ADDP. Access to ADDP service can be enabled or disabled, but the

network port number for ADDP cannot be changed from its default.