User Manual

1785-5.19 - January 1999
2 Optical Transceiver
Description
The 1785-TR10BF mini optical transceiver can be connected to the AUI
interface of a device either directly or via an AUI cable. It is connected to
the fiber optic cable by a BFOC socket.
The 1785-TR1 0BF mini op tical tra nsceiver off ers these f unctions accordin g
to IEEE 802.3 10BASE-FL:
•
indicati on via LEDs of dat a trans mission and reception through th e fiber
optic cable
•
detection of data collisions in the network and reporting them to the
terminal equipment as well as indicating them by an LED
•
ability to enable/disable the SQE test: at the end of every transmit
operatio n, a short coll ision sign al (heart beat) approx. 1 µs long is sen t to
monitor the electronics
•
jabber cont rol and displa y: protect the networ k from data packets th at are
too long (> 70 ms)
•
link status: an IDLE signal continuously monitors the fiber optic cable
segment for breakage
AUI Interface
(15-pin sub-D connector)
Tx-Packet
Detect
Rx-Packet
Detect
Collision
Detector
SQE-Test
Osc.
ENABLE/
DISABLE
Collision
Generator
DO
CI
DI
Loopback
Data
Rx-Data
Lowlight
Detection
Rx-Data
Jabber
Protect
Tx-Data
Idle
Generator
Fiber Optic Interface
(acc. to 10BASE-FL)
DISABLE
ENABLE