Ntdk20 Ssc Card Faceplate Leds - Nortel 1000E Maintenance Manual

Table 5
NTRB21 LEDs (Part 2 of 2)
Affected
circuit card
NTAK20
Monitor jacks

NTDK20 SSC card Faceplate LEDs

LED State
CC On (Red)
On (Green)
Flashing
(Green)
The NTAK10, NTAK79, NTBK50, and NTRB21 have two bantam jacks
(RCV and XMT) located on the faceplate. They are used to monitor the
performance of the carrier in the receive and transmit direction. The jacks
allow the convenient connection of external T1/E1 test equipment and ISDN
protocol analyzers.
Note: The NTDK20 SSC card is installed in all Media Gateways.
The NTDK20 SSC card has either three or five faceplate LEDs, depending on
the version of the card.
Hardware maintenance tools
The NTAK20 is equipped and disabled.
The NTAK20 is equipped and is either
locked to a reference or is in free-run
mode.
The NTAK20 is equipped and is attempting
to lock (tracking mode) to a reference. If
the LED flashes continuously over an
extended period of time, check the CC
STAT in LD 60. If the CC is tracking, this
can be an acceptable state. Check for slips
and related clock controller error
conditions. If none exist, then this state is
acceptable, and the flashing is identifying
jitter on the reference.
Off The NTAK20 is not equipped.
Communication Server 1000E
Page 41 of 162
Definition
Maintenance