Cabletron Systems SmartSwitch SBU128, Руководство пользователя

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This is the SBU128
80-10200000-01 1–5
1.3.4 Spoofing
There are two occurrences with automatic backup technology which
need to be provided for.
The first is where a terminal or CPU stops transmitting idle data frames.
In this instance the SBU128 would normally backup, which is
undesirable. Enabling the SBU128 Transmit Spoof causes a line
inversion to be sent once a second whenever no data is transmitted from
the user DTE to the User port; this prevents data loss backup from
occurring.
The second is where a central site does not want to bear the cost of all
backup calls. Enabling the Remote Backup Spoofing causes transmit
data to the DLC to be clamped to a constant mark, thus causing the
remote SBU128 to detect dataloss, and then backup.
1.3.5 Talkwire
Talkwire is the facility which enables remote control and configuration of
an SBU128 over the ISDN network when data is being routed over the
DLC.
As this feature allows you access to all SBU128s connected to the ISDN
(providing you have the correct telephone number), the SBU128
supports the Network provided Calling Line Identification facility for
enhanced security.
1.3.6 Polling
In a large network of SBU128s, all units can be interconnected and
controlled using a single terminal.
A “poll” number can be set for each unit within the group, allowing
individual SBU128s to be accessed from the terminal by using the poll
numbering system.