2–2
Configuration
You can have a maximum of four repeaters and five segments in a
network path between two stations. A network path with four repeaters
must have at least two point-to-point link segments. Link segments
contain two transceivers (MAUs). When not used as a point-to-point link,
a ThinWire segment may contain 30 transceivers.
NOTE
The DECrepeater 90C port has an integral transceiver.
A ThinWire segment can be a maximum of 185 meters long.
Port Partitioning
Any messages or data packets received from any port backbone by the
repeater are transmitted to all ports. The port status LEDs on the
repeater indicate the status of each port, including partitioning activity:
On
The port is either active or not partitioned.
Off
The port is autopartitioned.
Flashing
The port is partitioned by management, independent of any
other partitioning.
Each port is automatically controlled and can be partitioned for any one
of the four following reasons:
Table 2–1
DECrepeater 90C Partitioning
LED
Faults
Nonfaults
Port 0
Off
Open cables.
Shorted cables.
Cables incorrectly terminated
or connected without a T-connector.
Nothing connected to the
port.
Port 0 to 6
Flashing
—
Partitioned by
management.
Port 1 to 6
Off
Open cables.
Shorted cables.
Cables improperly terminated by
using a T-connector.
Nothing connected to the
port.