# Multi-Line Mailing System

Because Argus is a true multi-line mailing system, configuration and co-ordination of all lines is truly quick and easy. There are no special limitations to number of concurrent connections - it just depends on a users' possibilities and requirements. The data transfer with a node can be established either via Dial-up or TCP/IP transport - this is determined by transport availability.

Dial-up lines can be started automatically at Argus start-up or manually by a user's request with System / Open Dial-up Line menu command. Each dial-up line requires a communication port, so the number of ports limits the number of lines being active simultaneously in a system.

TCP/IP lines are created and disposed as a result of TCP/IP Daemon functioning. As soon as Argus detects an incoming TCP/IP connection or a new poll via TCP/IP in the Poll Manager, Daemon creates a new mailing system line and starts a file transfer protocol. When a TCP/IP session finishes, Daemon closes the line and ends the connection.