Tones Diagnostic; Speech Path Diagnostic; Time Switch Card Diagnostic - Nortel DMS-100 Series Maintenance Manual
Subscriber carrier module-100s
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Also See for DMS-100 Series:
- Replacement procedures (1100 pages) ,
- Maintenance manual (762 pages) ,
- Manual (543 pages)
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the NT6X85 DS-1 interface cards
the speech bus
Tones diagnostic
The tones diagnostic runs PCM checksums on the tones of ports 16 and 17
phantom ports. The tones diagnostic runs the checksum to make sure that
these checksums agree with the checksums in the tone ROM. The tone
ROM is on the NT6X69 message card. This diagnostic also checks the
speech bus connection memory for all channels. The diagnostic performs
this check to make sure that the tones are allowed on the speech bus. The
diagnostic does not check the connection for 0 and 16 of ports 16 and 17.
This diagnostic involves the following hardware components:
the NT6X69 message and tone card (NT6X69AD ASIC version if UTR
is present)
the speech bus
Speech path diagnostic
The speech path diagnostic performs a complete check for data integrity on
all the XMS-based peripheral module (XPM) speech channels. This
diagnostic checks all C-side and P-side loop-arounds and all time slots of the
speech bus. This diagnostic also tests the highway, multiplex and the PCM
enable-disable gates.
This diagnostic involves the following hardware components:
the NT6X41 formatter card
the NT6X69 message and tones card (NT6X69AD ASIC version if UTR
is present)
the NT6X44 time switch card
the NT6X85 DS-1 interface cards
speech bus
Time switch card diagnostic
The SMS time switch card switches the speech, control, and supervisory
signals from the C-side to the P-side of the SMS. The time switch card
diagnostic tests the time switching of the time switch NT6X44 card. This
diagnostic runs if the SMS is OOS. The diagnostic tests for the time switch
card test the incoming and outgoing connection memories. These tests
perform a test of the time switching function of the card. The time switch
diagnostic tests the NT6X44 phase comparators in both InSv and OOS
states. This diagnostic checks the values of the office-sync phase
DMS-100 Family SMS Maintenance Manual XPM10 and up
Trouble isolation and correction 9-41
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Troubleshooting
