ADC Campus-REX2 RS Configuring Bridge Protocol, Encapsulation and Timing

Chapter 3 - Configuring the REX2

Configuring Bridge Protocol, Encapsulation and Timing

The Campus-REX2, as a default configuration, bridges Ethernet frames.

1Type 1 then press ENTER if bridge is not selected.

2To change the packet encapsulation, type 2 then press ENTER . Select an Encapsulation option:

•cHDLC for Campus-REX2 to another Campus-REX2 application

•PPP when the remote Campus unit has a synchronous interface card such as a V.35 or when connecting to Ethernet equipment from another manufacturer

3To change the timing source, type 3 then press ENTER . Select a timing source setting:

•Internal (default setting) which takes its timing from an internal oscillator

•HDSL which takes its timing from the HDSL link

The Timing Source option determines the source of circuit timing on the HDSL link. The proper setting of the Timing Source option depends upon the interface card of the remote Campus unit:

•If the Campus-REX2 is connected to a Campus unit with another Campus-REX2, leave the Timing Source option set to Internal. Set the other end (remote) of the connection to HDSL; the Campus system will not operate properly if both units are set to HDSL.

•If the Campus-REX2 is connected to a Campus unit with a synchronous interface card, such as a Fractional V.35 card, the timing source depends on the setting of the Primary Timing Source option of the remote unit:

–Set the Timing Source to HDSL if the remote unit is set to Internal or Data Port.

–Set the Timing Source to Internal if the remote unit is set to HDSL.

See the Campus-RS Fractional Interface Card User Manual for information on the Primary Timing Source option.

•If the Campus-REX2 is connected to a Campus unit with a Campus CSU/DS-1 or CSU/DSX-1 interface card, set the Timing Source option to Internal.

Campus-REX2 RS Interface Card User Manual 31