aurora
Sonata
Hand Held ISDN Tester—User Guide
4-4 427869
Introduction
This section includes:
• advice on simulation on Basic and Primary Rate links
• a discussion of when you might use aurora
Sonata
to
emulate different ISDN devices
• brief details on the types of link you can test
• an introduction to aurora
Sonata
’s ISDN Test Suite
Simulation on a Basic Rate link
You can use aurora
Sonata
for simulation on the Basic Rate S and
U interfaces.
Simulation on the S interface
On the BRI S interface you can use aurora
Sonata
to emulate
Terminal Equipment (a TE) or a Network Termination (NT).
Using the termination resistor
The S bus must be terminated with 100Ω at each end. This is
normally done by the NT and the most distant socket on the
bus.
For simulation on the S bus, you must switch aurora
Sonata
’s
100Ω termination resistor on or off, depending on the device
aurora
Sonata
is emulating and the other equipment on the link.
When emulating an NT, the resistor must always be On.
Only one TE on the interface can have the S bus termination
connected at any one time. Therefore, when you need to
emulate a TE on a line where there are other TEs, check
whether one of the other TEs has a termination resistor. If so,
you must switch aurora
Sonata
’s resistor Off. If not, you must
switch aurora
Sonata
’s resistor On.
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