Compatible Systems 5.4 - Manual (Page 231)

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.