Maintenance Display Code - Nortel Meridian 1 General Maintenance Information

Table 3 gives two examples of LED indications.
Table 3
Sample LED indications
Type of card
Common equipment
power supply
Digital line card
Figure 5 on page 32 shows the location of the LED on the faceplate of an
Intelligent Peripheral line card.

Maintenance display code

Maintenance displays are located on the faceplate of some circuit cards. A
hexadecimal code is displayed. Interpretations of the maintenance display
codes are listed under "HEX" in the X11 System Messages (553-3001-411)
You should examine previous codes, system messages, and visual indicators
with any current maintenance display codes to properly analyze faults.
In Options 51C, 61C, 81, and 81C, the maintenance display on the Call
Processor Card (NT6D66, NT9D19, NT5D10 or NT5D03) shows two lines
of information with up to 16 characters per line. The hexadecimal code and
its definition are shown on the display.
Each new code shown on a maintenance display overwrites the one before it.
However, note the following:
• All codes received on common equipment displays are recorded. You
can review them by printing the History File.
• The most recent 16 codes displayed on a controller card stay in memory.
You can review them and reset the counter through the Network and
Signaling Diagnostic (LD 30).
• In Options 51C, 61C, 81, and 81C, the most recent 64 displays on a CP
card stay in memory. You can review the displays on the active CP card
through the Core Common Equipment Diagnostic (LD 135).
Hardware maintenance tools
LED color
green LED lit
red LED lit
Meridian 1 General Maintenance Information
Page 31 of 72
Status
= operation normal
= disabled or not
equipped