64
2-WIRE IDSL LINE DRIVER RACK CARDS
E.6.2 LED S
TATUS
I
NDICATORS
The 10BASE-T Ethernet rear card features two LEDs that monitor general
operating status and the 10BASE-T twisted-pair link integrity. Figure E-8 shows the
LEDs located directly beneath the RJ-45 jack. Following Figure E-8 is a description
of each LED’s function.
Figure E-8. 10BASE-T Ethernet Rear Card LED locations.
• Status: Blinks yellow from one to eleven times to indicate system status. Each
pulse pattern is separated by a 2-second “off” period. Greater pulse patterns
have higher priority (buffer saturation has greater priority than an empty MAC
table). Valid system statuses are:
1 pulse
= system status OK
2 pulses
= no MAC entries in the MAC address table
3 pulses
= Clear to Send (CTS) or Carrier Detect (CD) from base unit
are not asserted
4 pulses
= Rear card buffer is saturated
5 pulses
= WAN receive frame(s) too large
6 pulses
= WN receive frame(s) not Octet aligned
Status LED
(Yellow)
Link Integrity
LED (Green)
