Patton electronic 29XX User Manual Page 278

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Introduction 278
Access Server Administrators’ Reference Guide 23 • Sync PPP
Introduction
Point-to-point protocol (PPP) is a widely used data link layer protocol for connecting remote devices in point-
to-point configuration. Mainly used in dial-up applications and in network core applications, PPP is used for
multiplexed transport over a point-to-point link, it operates on all full-duplex media, and is a symmetric peer-
to-peer protocol, which consists of the following major components:
A standard method to encapsulate datagrams over serial links.
A link control protocol (LCP) to establish, configure, and test the data-link connection.
A family of network control protocols (NCPs) to establish and configure different network layer protocols.
In addition to offering PPP for the dial-up links, the remote access server also provides PPP connections on the
WAN side via E1 or T1 uplinks.
WAN Circuit CONFIGURATION window
In order to configure PPP on a T1/E1 WAN link go to the WAN Configuration page for the WAN circuit you
wish to configure. The Signal Mode on this configuration page must be set to none(1) for Sync PPP.
Figure 115. WAN Circuit Configuration for PPP
Line Status—Channel Assignment
To set channels for PPP within a WAN link, go to the WAN Circuit Configuration Link page for the corre-
sponding WAN port, and click on the
Channel Assignment
hyperlink.
The Desired function for each channel which is going to use Sync PPP must be set for ppp(5). The
PPP
button
at the top of the page may be used to set all channels on this WAN circuit to ppp(5). Once the channels are set
to PPP, the PPP negotiation phase will begin. Only one PPP link can be established per WAN link. The band
-
width will be the number of channels using PPP times 64 kbps. For example, if 12 channels are set for ppp(5),
the bandwidth will be 12 x 64 kbps or 768 kbps.
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