Chapter 13: Token Ring Cards
Token Ring LEDs
SmartBits System Reference 173
TokenRingLEDs
Table 13-2 describes the LED functions and descriptions for the Token Ring card.
Note: When the card is running as Stations in an idling 16MBits/sec ring, then the top
two LEDs (TX INIT and TRIG/BCN) will be dark, the third LED (Rx ERR) will be
yellow, and the bottom two LEDs will be green. The middle LED Rx ERR will
periodically flash green as monitor poll frames circulate on the ring.
Table 13-2.LED Functions for Token Ring SmartCards
LED Color Description
TX INIT Green
Red
Transmitting. LED flashes briefly for each
frame transmitted. If continuous
transmission, light appears as a steady on
condition. Tokens transmitted automatically
by Token Ring SmartCard do not activate this
LED.
Card not initialized. This light is red briefly
until the card boots up.
TRIG/BCN Green
Red
Yellow
Trigger Event indication. Flashes briefly for
each trigger detection.
Beacon Event. Flashes briefly for each
beacon event detected.
Both Beacon & Trigger Event occur
simultaneously. The flash appears as yellow.
RX ERR Green
Yellow
Red
Receive. Flashes green once for each frame
detected on the ring.
Token. Flashes yellow briefly for each token
detected on ring.
CRC Errors. Flashes red once for each frame
received with a bad CRC.
16M 4M Green
Yellow
16 Mbps (steady on LED operation)
4 Mbps (steady on LED operation)
ST PORT Green
Yellow
Station Emulation (steady on LED operation)
MAU (Port) Emulation (steady on LED
operation)
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