MMI-PT
Issue 4 May 2002
10-1129555-233-123
f. This error occurs if either the MMI or Voice Conditioner (VC) circuit packs
reports a loss of framing on the service channel between these two circuit
packs. When a customer endpoint establishes a call to the VSP-MCU, a
channel is established between the MMI resource and the VC port. If this
channel is detected to go down by either circuit pack, an uplink message is
sent. This error is then forwarded to maintenance for both circuit packs.
Run the Long Test Sequence for this MMI resource, and if any of the tests
fail, follow the repair procedures for that test. If all tests pass, the cause of
the problem might be with the VC pack. See the “VC-DSPPT” repair
procedures.
g. These errors are not related to VSP-MCU. They could be caused by
network problems or from the customer endpoints. They are presented
here for logging purposes only:
System Technician-Demanded Tests:
Descriptions and Error Codes
Resource Looparound Test (#1111)
This test is destructive.
This test checks the connectivity of the resource within MMI circuit pack and out to
the TDM bus. The object is to test the circuitry that an H.221 bit stream comes in
contact with when that stream is demultiplexed, pre-processed, written to the
TDM bus and then reread (looped in the TSI), post-processed, multiplexed, and
then written back to the TDM bus for verification. The video, audio, and data
components of the bit stream are tested separately. If any one of these tests fails,
then the resource is taken out of service.
Code Description
3841 CRC4 Error (Frame checksum error)
3842 Correctable BAS (Control msg single or double bit error, but
correctable)
3843 Uncorrectable BAS (Control msg bit error -three or more bit,
uncorrectable)
3844 Protocol Error (H.221 Protocol error from endpoint detected)
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND
1
1 D = Destructive; ND = Nondestructive
Resource Looparound Test (#1111) X X D
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