Operation Manual

NetWAYS/ISDN – Glossary 69
PAP (Password Authentication Protocol)
One of the two authentication protocols in the PPP suite. A
name and password for the remote system must be config-
ured on the system that requests authentication. The remote
system must be configured to present the same name and
password. In PAP authentication, the name and password
are sent unencrypted, and the authenticating system simply
compares them with its settings. If they match, the remote
system is authentic and the connection can be set up. Be-
cause PAP transmits the password in the clear, PAP should
only be used on media that are safe from eavesdropping,
and only if the more secure CHAP is not supported by the re-
mote site.
Physical ISDN connection
The physical ISDN connection exists when one or more
B channels are connected to the remote site and connection
charges are accumulating. The physical ISDN connection is
always based on a logical ISDN connection: the connection
is controlled by the negotiated connection parameters.
Ping (Packet InterNet Groper)
A program that tests whether an IP host is reachable. The
program sends an ICMP echo request packet to an IP host
and waits for a reply. The command line option “-w” causes
the Windows implementation of “ping” to wait a specified
number of milliseconds for a reply. To allow a few seconds
for ISDN dial-up and PPP negotiation, you should use the
command “ping -w 5000” to specify a timeout of five sec-
onds when testing an ISDN connection.
PPP
See “PPP over ISDN (Point-to-Point-Protocol)” on page 69
PPP over ISDN (Point-to-Point-Protocol)
A communication protocol for circuit-switched networks such
as ISDN that provide protocol-independent communication
on ISO OSI Layer 2. PPP over ISDN incorporates a collection
of subordinate standards and protocols. These describe the
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