Physical Description - Avaya Nortel Communication Server 1000 Reference

NTDW12AAE5 Universal Clock Controller daughter board

Physical description

Faceplate LEDs
Each motherboard (NTDW79AAE5 UDT E1/T1 card) has four DTI/PRI LEDs and one clock
controller LED. The clock controller LED is dual-color (red and green). The clock controller
LED states are described in
Table 252: Faceplate LEDs
State
On (Red)
On (Green)
Flashing (Green)
Off
Functional description
The main functional blocks of the Universal clock controller daughterboard include:
• phase difference detector circuit
• digital phase lock loops (PLL)
• digital-to-analog converter
• signal conditioning drivers and buffers
588 Circuit Card Reference
Table 252: Faceplate LEDs
Definition
The clock controller is equipped and
disabled/not configured.
The clock controller is equipped, enabled,
and is either locked to a reference or is in free
run mode.
The clock controller 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
may 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
The clock controller is not equipped.
Comments? infodev@avaya.com
on page 588.
July 2011