4.0 OPERATION
The Model 2100LC does not require any configuration or AC
power, and its operation is completely transparent.
During operation, the Model 2100LC receives electrical signals
from the 802.5 Ethernet. This transmission is then “double checked”:
the SQE feature sends a pulse back to the Ethernet to verify that all
signals were received correctly. After verification, the Model 2100LC
converts the original signals into new signals that are compatible with
the 802.3 twisted pair interface. The new signals are then transmitted
back to the workstation.
If the Model 2100LC is connected to an interface card, the SQE
feature should be enabled (switch ON). If the Model 2100LC is
connected to a hub or repeater, the SQE switch should be OFF.
APPENDIX A
SPECIFICATIONS
Standard: IEEE 802.3 compliant
Connectors: DB-15 male on AUI port, RJ-45 jack on
10BaseT twisted pair port
Link Parameters:
Duration between transmit link pulses: 8ms(min)/24ms(max)
Duration between receive link pulses: 3ms(min)/105ms(max)
Collision Parameters:
Collision signal ON/OFF delay (CI+/-): 900ns(max)
Collision to end of AUI loopback ON (DI+/-): 800ns (max)
Start of AUI loopback to end of collision: 100ns(max)
Collision Parameters:
Jabbering node isolated from network if jabber surpasses a 26ms
transmit time. The jabber function will inhibit transmission (except
for link pulses), discontinue AUI loopback, and send a collision
signal on the AUI CI+/- circuit.
Power Supply: None required, uses power from AUI data
signals
Temperature Range: 0-60°C (32-140°F)
Altitude: 0-15,000 feet
Humidity: Up to 95% noncondensing
Dimensions: 2.25”L x 1.69”H x 0.75”W
Weight: 1.5 oz.
5
6