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aurora
Duet
Basic & Primary Rate ISDN Tester - User Guide
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aurora
Duet
emulation modes
aurora
Duet
can test ISDN equipment and lines, and the
route through the ISDN network via one or more
exchanges. aurora
Duet
can either operate at Layer 1 as
supplier of the clock or as receiver of the clock. It can
also be set to be either the ‘master’ (network side) of the
protocol at Layers 2 and 3, or the ‘slave’ (user side) of
the protocol. You can also test fixed links—i.e. links
without protocol support.
The options normally used are:
• Clock supplied / master protocol = “NT master”
(abbreviated to NT within aurora
Duet
)
• Clock received / slave protocol = “TE slave”
(abbreviated to TE within aurora
Duet
).
When testing fixed links, i.e. without protocol, the
opposite settings—i.e. "NT slave" and "TE master" may
be used.
It is also possible to set aurora
Duet
to "NT fixed" or "TE
fixed", for testing fixed links. In PRI mode you can do
this using a Hot Key—see Chapter 5. In BRI mode it is
done using the
L2 PROTOCOL
option in the
EMULATION
screen. See Chapter 8 for details.
In order to test terminal equipment, aurora
Duet
must be set
to NT mode. In order to communicate with an exchange
it is normally set to TE mode.
aurora
Duet
can also be configured for:
• Point-to-Point (PP) operation. This is operation
between one NT and one TE on a single line sharing
a common protocol.