VC-DSPPT
Issue 4 May 2002
10-1975 555-233-123
b. The VC DSP Port NPE Crosstalk Test(#1103) failed.
c. The VC DSP Port Local TDM Loopback Test(#1104) failed. Run the Long
Test Sequence.
d. A critical hardware failure has been detected on the circuit pack. Reset the
port by the busyout port PCSSpp and reset port PCSSpp commands. If
the VC Reset DSP Test (#1106) passes, then the on-board circuitry is
healthy. Retire the alarm with the test port PCSSpp long clear command.
e. The VC DSP port reported loss of framing on the Service Channel between
the VC and MMI circuit packs.
f. The VC DSP Port DSP Loopback Test (#1105) failed.
g. The DSP corresponding to this port on the VC circuit pack reported a
firmware error. No action is required.
System Technician-Demanded Tests:
Descriptions and Error Codes
Always investigate tests in the order presented in the table below. By clearing
error codes associated with the DSP NPE Crosstalk Test, for example, you may
also clear errors generated from other tests in the testing sequence.
VC DSP Port NPE Crosstalk Test (#1103)
This test is destructive.
The NPE controls port connectivity and gain and provides conferencing functions.
The NPE Crosstalk test verifies that this port’s NPE channel talks on the selected
time slot and never crosses over to time slots reserved for other connections. If
the NPE is not working correctly, one-way and noisy connections may be
observed. This test is part of the port’s long test sequence and takes
approximately 20 to 30 seconds to complete.
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND
1
1 D = Destructive; ND = Nondestructive
DSP NPE Crosstalk Test (#1103) X D
TDM Loopback Test (#1104) X X D
DSP Loopback Test (#1105) X X D
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