Formatter Diagnostic; Message Diagnostic - Nortel DMS-100 Series Maintenance Manual

9-40 Trouble isolation and correction
This diagnostic involves the following hardware components:

Formatter diagnostic

The formatter diagnostic tests the NT6X41 formatter card. The diagnostic
tests the control RAM and the C-side loop enable-disable function. This
diagnostic checks for correct functioning of the network framing interrupts,
C-side messaging, and P-side messaging. The diagnostic checks the
integrity of the speech bus connection and message memories, both located
on the NT6X69 message card.
This diagnostic involves the following hardware components:

Message diagnostic

The message diagnostic tests the hardware of the NT6X69 message card.
The message diagnostic validates the integrity of the message buffer
memory and P- and C-side messaging.
The diagnostic checks for correct functioning of the following:
This diagnostic involves the following hardware components:
297-8231-550 Standard 09.01 August 1998
correct action between the integrity match-mismatch and CDB update
logic
correct operation of the CSM loop on the NT6X41 formatter card.
the NT6X42 CSM card
the NT6X41 formatter card
the speech bus
the NT6X41 formatter card
the NT6X69 message card
the NT6X44 time switch card
the speech bus
the time slice processes of the on-board processor
the speech bus interface
the intermodule communication (IMC) link
the cyclic redundancy check (CRC) ROM.
the NT6X69 message card (NT6X69AD ASIC version if UTR is
present)
the NT6X44 time switch card
the NT6X41 formatter card