Agilent Technologies Auroraduet N1726A, Руководство пользователя, Страница: 193 / 507

aurora
Duet
- User Guide
4 - 52 422685
Additional Information
Channels
Indicates if the BERT was on an incoming or outgoing
channel; also provides the channel numbers.
Cause Indicates whether the local or the remote was
responsible for the cleardown; also provides the clear
cause code.
Test time The actual time taken to run the test, from the time of
first synchronisation.
BERT
Setup
information
Shows which of the four BERT settings was used. Also
shows the settings used: test length, pattern, threshold,
resynchronisation and error insert.
Fixed Links: Testing a Cable or Network
Without Establishing a Call
A fixed link is a point to point link consisting of a single
dedicated ISDN circuit between a TE and an NT. No
ISDN protocol support is used for call control, so there is
no call setup process.
To test a fixed link, perform the following steps:
1 Connect up aurora
Duet
for testing on a fixed link.
You can do this in two ways:
• Physically loop the line at the remote end
• Connect aurora
Duet
and another device (such as
another aurora ISDN tester) at either end of the
link, with one emulating a TE and the other an
NT.
2 Switch off protocol support, by setting the L2
PROTOCOL to NO D CHAN - see Identifying the
Protocol Master and Slave in Chapter 3 Section 1.
3 Run a BER test on the D channel - this is explained
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