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SONET_Usr.bk Page 128 Wednesday, December 13, 2000 11:11 AM
Tandem Connection Monitoring
Tandem Connection Terminating Equipment (TCTE) Testing
4 Configure the OmniBER to send a valid VC-n to the TCTE Source. For this
5 Check that there are no alarms indicated on the OmniBER front panel.
6 Check for correct TC-APId (access point identifier) as follows:
7 Press
8 Select the
9 Set the Receiver settings to match those of your system.
10 Set the TCM PATH field to
11 Select the
12 Select the MONITOR field and choose
128
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example we have selected VC-4 mapping over STM-1.
If TCM is not enabled on the TCTE then the instrument STATUS line (at bottom
of the display) will indicate "TCM Loss of Multiframe (TC-LOM)", and the
Alarm Seconds results on the Results page will indicate TC-LOM alarms . The
absence of errors confirms that TCM is configured correctly.
and select
RECEIVE
MAIN SETTINGS
HIGH ORDER
ORDER selection is enabled when a TU mapping is selected.
OVERHEAD MONITOR
that the TC-APId matches the APId as expected from the TCTE, an example is
given on the following page.
.
SDH
folder.
or
LOW ORDER
folder.
, check on the display
TCM MESSAGE
. The LOW
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