Agilent Technologies aurora Duet, Руководство пользователя

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aurora
Duet
Basic & Primary Rate ISDN Tester - User Guide
6 - 2 428856
between the two channels, connect the CODEC and
listen to whichever call you want to.
It is possible, however, to make or receive a voice call at
the same time as a data call is in progress. This is a
valuable test which can be performed to detect any cross-
channel interference which may be present.
Notes on data calls
Quality is tested by running a Bit Error Rate Test (BERT)
in the data connection established by a call. This test
transmits a selected known pattern of data at 56 or
64kbps and checks a similar received pattern for bit
errors.
BER testing can be performed in the following ways:
• You can make an end-to-end test call between your
aurora
Duet
and either another compatible ISDN basic
or primary rate tester, or a non-compatible data
tester connected to the ISDN through a terminal
adaptor.
• You can make a loopback test call to another
channel of the same
aurora Duet . In this configuration,
the other channel loops the received data back to
line, so that it arrives back at the receiver of the
originating channel. In this way you can perform a
full duplex BER test of both channels
simultaneously.