Digital Equipment DECbrouter 90, Инструкция по установке и эксплуатации, Страница: 19 / 62

Overview
LEDs and Connectors
Table 1–2 (Cont.) DECbrouter 90 LEDs
Synchronous serial port 1 connection –This port
supports the following standards:
• EIA530A
1
• RS232/V.28
• RS449/RS422/V.11
1
• RS449/RS423/V.10
1
• V.35
2
• V.36
1
• X.21 leased lines
Console port connection –This port connects a
console terminal, used for managing the DECbrouter
90. The console port is an RS232, which uses a DB9
connector.
Port 0 network connector (BNC) –Connects the
DECbrouter 90 to the work group ThinWire segment.
Not used when the DECbrouter 90 is either installed
in the DEChub 90 backplane or connected through the
twisted pair (10BASET) connector.
Backplane connector –Provides Port 0 network
and power connections to the DECbrouter 90 when
the DECbrouter 90 is installed in the DEChub 90
backplane.
Power connector
–Pr5.0 volts from the
DECbrouter 90 power supply. Not used when the
DECbrouter 90 is installed in the DEChub 90
backplane.
Back cover
–Comes with standalone units only. Covers
the backplane connector and contains a wall-mounting
assembly.
Port 2 serial line status indicators –Monitors the
activity of port two.
On: Port 2 is transmitting or receiving data.
Off: Port 2 is not transmitting or receiving data.
1
Not available on DECbrouter 90T2.
2
Not available on DECbrouter 90T2A.
(continued on next page)
Overview 1–11