Cabletron Systems KBU 64, Руководство пользователя

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The Front & Rear Panel Descriptions
80-10100000-09 3–5
Below is a truth table of the Alarm port interface pins that are connected
by the relay contacts when an alarm occurs:
B1 Alarm B2 Alarm Pins connected on Alarm Port
1. No No 12-13, 9-21, 23-11
2. Yes No 12-25, 9-10, 23-11
3. Yes Yes 12-25, 9-10, 23-24
4. No Yes 12-13, 9-10, 23-24
3.4 USER and LINK
The KBU 64 has been designed so as to permit the user to insert the unit
between the user equipment and the Kilostream NTU. To maintain the
simplicity of this system, the USER ports are defined as physical DCEs
and the LINK ports as physical DTEs.
With the unit switched off, or in the event of a power failure, USER 1 is
connected directly to LINK 1 and USER 2 to LINK 2 via relay contacts.
When your Kilostream backup unit is powered on, the relays are
switched causing direct connection to be broken, whilst the signals are
routed through the interface receivers and transmitters of your KBU 64.
The KBU 64 is a dual channel device offering independent control
through each channel. These are physically separated as: USER 1 to
LINK 1 and USER 2 to LINK 2. The USER interface is for connection
between your user equipment and the KBU 64, the corresponding LINK
interface connects to the Kilostream NTU (see
Figure 3.2 ).
All operating parameters, such as speed, data, parity etc., are software
defined. Settings may be altered using a terminal connected to the
COMMAND port.