Agilent Technologies auroraSonata, User Manual

Page: 69 / 336

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 75
Ω
or 120
Ω
, 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 .
Note
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.