Patton electronic 2155 - Manual (Page 12)

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Table 1: LED status monitor indications
LED Description
DSL Link (Active Green) Solid green (On) indicates that the end to
end DSL Framer Link is up, signifying that the link across
the DSL span is active. The DSL Link LED is Off when the
link is down.
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 is okay
• 2 pulses—no MAC entries in the MAC Address Table
• 3 pulses—Clear to Send (CTS) or Carrier Detect (DCD)
from base unit are not asserted
• 4 pulses—IM1/I buffer is saturated
• 5 pulses—WAN receive frame(s) too large
• 6 pulses—WAN receive frame(s) not octet aligned
• 7 pulses—WAN receive frame(s) aborted
• 8 pulses—Detected WAN receive frame(s) with CRC
• 9 pulses—Detected LAN receive frame(s) too large
• 10 pulses—Detected LAN receive frame(s) not octet
aligned
• 11 pulses—Detected LAN receive frame(s) with bad
CRC
10BT Link (Active green) Solid green indicates that the 10Base-T
Ethernet interface has detected a valid SQE heartbeat, signi-
fying a valid 10Base-T connection
NS (Active red) Solid red indicates that the Digital Signal Proces-
sors (DSPs) are not linked
ER (Active red) Flashing red indicates CRC errors on DSL
(framer) side if DSL Link is active or if bit errors are received
during loop/BER test
ER flashes once, to indicate a CRC error (during normal
operation) or bit errors (during Remote Loopback 511/511E
tests)
TM (Active yellow) Solid yellow indicates an Active Test Mode.
The unit may be placed in test mode by the local user or by
the remote user.