5-8
MAX 3000 Installation and Basic Configuration Guide
Basic Configuration Tasks
Establishing dial-in calls through terminal-server connections
Specifying DHCP settings
The DHCP subprofile defines whether the MAX unit processes DHCP packets and acts as a
DHCP server (the Reply Enabled parameter), the address pool to use to assign NAT clients (the
Pool Number parameter), and the number of dynamic addresses to assign to NAT clients on the
connection (the Max Leases parameter).
Establishing dial-in calls through terminal-server
connections
Asynchronous dial-in calls initiated from analog modems, ISDN modems (also called terminal
adapters, or TAs), or raw TCP are handled by the MAX unit’s terminal-server software, which
establishes connections to other network hosts.
Sessions established through the MAX terminal server are end-to-end connections with a
terminal device (such as terminal software on a PC) for the purpose of connecting with another
host. The MAX terminal server supports standard capabilities such as Telnet, the Domain
Name System (DNS), login and password control, Call Detail Reporting, and authentication
services.
This section describes the terminal server’s connectivity functions and introduces the
configuration tasks involved in setting up the terminal server to handle dial-in calls.
(Terminal-server management functions are described in “Using command-line-interface
(CLI) tools” on page 3-12.)
How the terminal server handles calls
If asynchronous calls arrive at a MAX unit from a modem or TA, they are sent to the digital
modem, which passes them on to the terminal server. How the terminal server handles the call
after that depends on the call’s encapsulation.
PPP-encapsulated calls
When the terminal server detects PPP packets in a call, it responds with a PPP packet and
begins Link Control Protocol (LCP) negotiation. It then hands the call off to the MAX router.
Thereafter, the router handles the call as if it were a standard ISDN call between two devices
running PPP. The parameters used to set up the calls are those defined in the Connection and
Answer profiles. The user has no interaction with the terminal-server interface.
Non-PPP calls
If the terminal-server software does not detect PPP packets, it initiates a login sequence to
another network host.
When the terminal server receives a name and password from the caller, it authenticates the
call by means of a Connection or Names/Password profile or an external authentication server.
