Foreign And Surge Voltage Protection - Nortel Meridian 1 Option 11C Compact Technical Reference Manual

Table 49
NTMW04 LED states
LED
DIS
ACT
RED
YEL
LBK
DCH
CC

Foreign and surge voltage protection

Lightning protectors must be installed between an external T-1 carrier facility
and the Meridian 1 Option 11C Compact cabinet. For public T-1 facilities,
this protection is provided by the local operating company. In a private T-1
facility environment, the NTAK92 protection assembly may be used.
The NTMW04 circuit card conforms to safety and performance standards for
foreign and surge voltage protection in an internal environment.
Chapter 13 — NTMW04 1.5 Mb DTI/PRI
State
On (Red) The NTMW04 circuit card is disabled.
Off The NTMW04 is not in a disabled state.
On (Green) The NTMW04 circuit card is in an active state.
No alarm states exist, the card is not disabled,
nor is it in a loopback state.
Off An alarm state or loopback state exists, or the
card has been disabled. See the other
faceplate LEDs for more information.
On (Red) A red-alarm state has been detected.
Off No red alarm.
On (Yellow) A yellow alarm state has been detected.
Off No yellow alarm.
On (Green) NTMW04 is in loop-back mode.
Off NTMW04 is not in loop-back mode.
On (Red) D Channel is disabled.
On (Green) D Channel is enabled.
On (Green) The NTMW04 is locked to a reference or is in
free run mode.
Flashing The NTMW04 is in tracking mode.
(Green)
Off The NTMW04 is not equipped
On (Red) The NTMW04 is not equipped.
Meridian 1 Option 11C Compact
Page 129 of 136
Definition
Technical Reference Guide