Issue 2 - 07/00 3-23
First Steps in Testing - Section 1
Terminating a Primary Rate link
You need to terminate a PRI link with either 75Ί or 120Ί, to
suit the equipment to which you are connecting aurora
Sonata
.
-1-
From the ISDN Setup menu, select PRI
termination to display an option window.
-2-
Highlight 75ohm or 120ohm and press
ENTER.
Switching CRC4 error checking off/on
You can choose whether aurora
Sonata
checks for CRC4 errors
according to the ITU-T G.704 standard.
-1-
From the ISDN Setup menu, select CRC4 to
display an option window.
-2-
Highlight Off or On and press ENTER.
When CRC4 checking is switched on, the CRC LED lights up
red when aurora
Sonata
detects a CRC4 error. For full details of
the physical tests, see Chapter 4 section 2.
Setting up aurora
Sonata
to return RAIs
aurora
Sonata
can be set up to return Remote Alarm Indicators
(RAIs) to the remote end if it is not receiving a proper signal.
-1-
From the ISDN Setup menu, select Return RAI
to display an option window.
-2-
Highlight No or Yes and press ENTER.
îîNote
For normal operation you would choose Yes , but you can
switch off the feature (No) if you do not require it. For full
details of the physical tests, see Chapter 4 section 2.
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