Compatible Systems 5.4 manual General 225, Physical DS3 Configuration WAN Dialog Box

Chapter 14 - General 225

Physical DS3 Configuration: WAN Dialog Box

Physical DS3 Configuration: WAN Dialog Box

To access this dialog box, select WAN/Physical Configuration from the Device View.

Clock Scheme

These radio buttons set whether the DSU will use its own internal clock or obtain the clock from the network to use for the DSU’s DS3 transmit signal towards the network.

•Master means an internal clock will be used.

•Slave means the clock derived from the DS3 receive signal will be used. This is the default setting

Line Build Out

These radio buttons should be set based on the distance between the device and the DS3 terminal located in your building.

•Short should be used for cable lengths from 0 - 100 feet.

•Long should be used for cable lengths from 101 - 900 feet.

CRC

These radio buttons control whether the DSU will use a 16-bit or 32-bit frame check sequence. Both ends of a DS3 connection must use the same CRC (Cyclical Redundancy Check) setting. The default is 16 bit.