UNIVERGE SV8100
Issue 4.1
System Hardware Manual
4 - 79
The switches 6 and 7 define if the terminators are active. These
should be set to ON, if the bus has no termination. If the bus is
already terminated they may be set to OFF.
Every ISDN-Bus must be terminated with a set of 100Ohm resistors
at its ends. Normally, NT's provide one set as they are assumed to
be at one end of the bus. At the other end of the bus, either the last
socket contains terminators or the attached device provides the
terminators.
The purpose of these terminators is not only to simulate an infinite
line which effectively sinks the signal in that direction. Their main
purpose on ISDN bus lines is to sink the 0's. 1's and 0's are different
in that way that 0's are actively sent to the line, and 1's are just high-
ohmic drivers. So to get rid of the 0's, there must be a load resistor to
discharge the line capacity. If there are no, or too few, terminators,
this does not work.
Summary of Contents for Univerge SV8100
Page 1: ...System Hardware Manual Issue 4 1 February 2011...
Page 2: ...THIS PAGE INTENTIONALLY LEFT BLANK...
Page 36: ...Issue 4 1 UNIVERGE SV8100 1 14 Introduction to SV8100...
Page 68: ...Issue 4 1 UNIVERGE SV8100 2 32 SV8100 System Specifications...
Page 99: ...UNIVERGE SV8100 Issue 4 1 System Hardware Manual 3 31 Figure 3 34 Install Screws Option 2...
Page 148: ...Issue 4 1 UNIVERGE SV8100 3 80 Installing the SV8100 Chassis...
Page 247: ...UNIVERGE SV8100 Issue 4 1 System Hardware Manual 4 99 Figure 4 34 Control Signal Connection...
Page 258: ...Issue 4 1 UNIVERGE SV8100 4 110 Installing the SV8100 Blades NOTES...
Page 418: ...Issue 4 1 UNIVERGE SV8100 6 64 Installing SV8100 Optional Equipment...