Agilent Technologies auroraSonata, Руководство пользователя

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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 100
Ω
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
100
Ω
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
.