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

8-30 RSC-M trouble isolation and correction
The following is a list of PLL components tested:
•
•
•
•
The following is a list of the problems detected:
•
•
•
•
•
•

Message diagnostic

The message diagnostic tests the hardware on the NTMX76 circuit card. This
diagnostic checks if the on-board processor time slice processes, the speech
bus interface, the IMC link, and the cyclic redundancy check (CRC) ROM
functions correctly. The test checks the integrity of the message buffer
memory and C-side and P-side messaging.
The diagnostic involves the following XPM hardware component:
•
•
•
•

Tones diagnostic

The tones diagnostic runs PCM checksums on the tones of ports 16 and 17.
These ports are phantom ports. The diagnostic makes sure the checksums
agree with the checksums in the tone ROM. The tone ROM is on the NTMX76
circuit card. This diagnostic checks the speech bus connection memory for all
channels except 0 and 16 of ports 16 and 17. The diagnostic tests this speech
bus memory to make sure the tones are enabled on the speech bus.
This diagnostic involves the NTMX76 circuit card and speech bus. This
circuit card and speech bus are hardware components.
297-8223-550 Standard 04.02 November 2000
phase comparator
gate
frame pulse indicator
frame pulse generator
Phase comparator value cannot be reset or read correctly.
Gate cannot be closed or opened during normal mode or test mode.
Real-time clock interrupts are not received.
Phase comparator counter results are not correct.
Frame pulse indicator does not match gate state.
Frame pulse generator does not generate internal frame pulses.
NTMX76 circuit card
NTMX75 circuit card
NTMX82 PCM30 interface packlets
speech bus