An Overview of the CTP100T Adapter
CTP100T USER’S MANUAL
Page 1-5
1.3.5
LANVIEW LEDs
The CTP100T adapter has five LANVIEW LEDs that monitor network
activity (link, collision present, receive, and transmit) and power status.
These LEDs are described in Table 1-1. They serve as a useful tool to
quickly diagnose physical layer problems.
Table 1-1. LANVIEW LEDs
LED
DESCRIPTION
LNK
(green)
Link OK – On when a twisted pair link has been estab-
lished between the CTP100T and the device at the
other end of the twisted pair segment.
This LED flashes when the polarity is reversed on the
twisted pair segment receive link. Regardless of this
condition, the CTP100T adapter passes the data on to
the twisted pair segment receive link. However, the
segment should be removed from the module and the
wiring corrected to avoid future problems.
CLN
(red)
Collision Present – On when there is a jabber condi-
tion.
This LED flashes when a collision signal is detected.
RCV
(yellow)
Receive – Flashes when the CTP100T is receiving a
data packet from the thin-net segment and forwarding
it to the twisted pair segment.
XMT
(green)
Transmit – Flashes when a data packet is being
transmitted on the thin-net segment.
