User Manual

Basic Remote Networking Incoming Connections
4-12
4.5.2.1 Ports Using Automatic Protocol Detection
If the port receiving the call is using automatic protocol detection, or is dedicated to SLIP or PPP, the
following sequence of events take place:
1 If automatic protocol detection (for PPP, SLIP, or both) is enabled, the link layer starts up when a PPP
or SLIP character is received from the incoming call.
If the port is dedicated, the link layer starts upon the receipt of any character.
2 The caller is attached to a temporary site. The name of this site is based on the port number used. For
example, an incoming call to port number 6 will generate a temporary site named Port6.
3 If using SLIP, callers continue to use the temporary site for the remainder of the connection.
If using PPP, the following steps occur:
A If the SCS port receiving the call has been configured to authenticate remote hosts using CHAP
or PAP, CHAP/PAP requests a username and password from the remote host.
If the remote host has been configured to send a username and password, it sends the pair to the
SCS.
B The username and password are compared to existing site names. One of the following occurs:
1 If the username matches the name of a site, the site will be checked to see if it has a local
password. If it does, this will be compared to the password entered by the caller. If the
passwords match, the user will begin using the custom site; the temporary site will stop
running.
2 If a site isn’t configured with a password, or the password entered by the caller doesn’t match
the site password, the username/password pair are compared to any authentication databases.
One of two outcomes is possible.
▼ If a match is found, the connection is successfully authenticated. The caller continues
using the temporary site for the remainder of the connection.
▼ If a match is not found, the connection attempt fails.
4.5.2.2 Ports Not Using Automatic Protocol Detection
If an incoming call is received on an SCS port that’s not configured to automatically run PPP or SLIP, the
following login sequence occurs.
1 The caller sends a carriage return.
2 If the port is configured to prompt for a login password, the caller must enter the correct login
password to continue.
If the port is configured to prompt for a username, the caller must enter a username.
If the port is configured for authentication, the caller must enter a valid password for the username.