User`s guide

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When checked, this checkbox causes the router to authenticate itself with the remote device
using PAP. If this parameter is set, the connection will fail if authentication is not successful.
Generally, this parameter is disabled.
Request local CHAP authentication
When checked, this checkbox causes the router to use the Challenge Handshake
Authentication Protocol (CHAP) for local authentication. As with PAP, this parameter is
generally enabled for incoming connections and disabled for outgoing connections.
Request remote CHAP authentication
As with PAP above, this checkbox controls whether or not the router should authenticate
itself with the remote device using CHAP. The connection will fail if authentication fails.
Generally, this parameter is enabled for outgoing connection and disabled for inbound
connections.
Request local (VJ) compression
When checked, this checkbox causes the router to request the use of Van Jacobson
compression which compresses TCP/IP headers to about 3 rather than the standard 40
octets. This is generally only used to improve efficiency on slow links.
Request remote (VJ) compression
When checked, this checkbox causes the router to send a negotiation packet that requests
that the remote device requests VJ compression.
Request local PFC
When checked, this checkbox causes the router to request Protocol Field Compression (PFC)
which compresses PPP protocol fields from 2 to 1 octet.
Request remote PFC
When checked, this checkbox causes the router to ask the remote device to request Protocol
Field Compression.
Request BACP
When this checkbox is checked, the router will use the Bandwidth Allocation Control Protocol
(BACP) to determine the ISDN number to dial for the seconds or third multi-link connection.
Request callback
When checked, this checkbox will request a callback when it dials into a remote device. Note
that the answering PPP instance of the remote unit must also be configured with the
telephone number of the calling unit and a suitable username, password combination.
Allow remote end to request callback
This drop-down list controls whether or not the router will respond to incoming callback
requests. The options are:
• Off
• Desired
• Required.
Allow this unit to authenticate using
CHAP-MD5
Selecting enabled from the drop-down menu will allow the router to authenticate logins
using the CHAP MD-5 algorithm.
MS-CHAP
Selecting enabled from the drop-down menu will allow the router to authenticate logins
using Microsoft’s proprietary MS-CHAP algorithm.
MS-CHAPv2