Verilink PRISM 3000 (34-00184) Product Manual - Manual (Page 34)

PRISM 3000 4-6 Terminal Operation
4.5 Maintenance Screen
The ‘Maintenance’ screen ( Screen 4-5 on page 4-6 ) allows
the user to perform test and maintenance functions on the
T1 circuit. BERT is performed by using on -board test facili-
ties. No other test equipment is needed. Actions initiated by
each field are detailed in the following paragraphs.
Clear Tests: Pressing on this field clears all tests
and any line loops that have been initiated.
Clear Alarms: Pressing on this field causes all
near end alarms to be cleared.
4.5.1 Test Loops
Loop status changes can be made only when the BERT
function is not in the active mode. The type of loop is cho-
sen by toggling the and is executed by pressing
.
T1 Loop: This field is used to select the test loops which
will be initiated. The normal operating mode and available
loopback options are detailed in
Figure 4-2 on page 4-8 .
T1 Unloop: Pressing on this field takes down the
specified loop.
Port Loop: This field is used to loop a high speed DTE
port at the near or far end (see
Figure 4-2 on page 4 -8). Far
end loops use V.54 loop codes to activate. To enable the
V.54 function, refer to
Section 4.6.3 on page 4-12 .
Port Unloop: Pressing takes down the specified
loop from the currently selected port.
4.5.2 BERT
BERT: Specifies the direction the BERT signal will be
sent. If the direction is changed from the front panel, the
new choice is not updated on the terminal interface until this
screen is exited and then reentered. The choices are:
‘
IDLE ’, ‘ T1 NET ’, ‘ T1 DTE ’, ‘ Channels 1–24 ’, plus
‘ ONE NET ’, ‘ ONE DTE ’, ‘ TWO NET ’, ‘ TWO DTE ’, ‘ THREE
NET ’, ‘ THREE DTE ’, ‘ FOUR NET ’, and ‘ FOUR DTE ’.
NOTE: All testing must be stopped before channels
may be reallocated to an active port.
Pattern: Specifies the pattern to be transmitted during a
test. Modifying this field will not cause the pattern to be
transmitted (refer to ‘Start Test’). The choices are
[QRSS] ,
[63] , [511] , [2047] , [2
15
] , [2
20
] , [2
23
] , [1:8] ,
[3:24] , [ ALT ], and [ CLEAR ]. The ‘ CLEAR ’ pattern passes
the received data through the unit (alarm detection and
reporting is disabled while the test is active).
Test Length: Defines the run-time of test pattern genera-
tion and error accumulation. The choices are
[Continu-
ous] , [15 min] , [30 min] , [60 min] , [24 Hour] .
Start Test: Pressing with the cursor on this field
starts the selected test pattern. ‘
TEST IN PROGRESS ’
appears once the test has started. To end the test, press
on ‘
STOP TEST ’.
Reset Errors: Pressing with the cursor on this
field causes the test error results to be cleared to zero.
The following fields are for display only. They reflect the
selected test parameters and the results of these tests only:
Screen 4-5 Maintenance
3000 DSU x.xx/x.xx PRISM 3000 Date: MM/DD/YY
No Far End Response London: (148) Time: HH:MM:SS
----------------------------- ELEMENT MAINTENANCE ------------------------------
BERT: [T1 NET]
(CLEAR TESTS) Pattern: [QRSS]
(CLEAR ALARMS) Test Length: [15 min]
T1 Loop: [FAR PLB] Pattern Sync: IN SYNC
T1 Unloop: [FAR PLB] Elapsed Time: 01:15:00
Bit Errors: 5
Port Loop: [2A NEAR ] Errored Seconds: 3
Port Unloop: [2A NEAR ] % EFS: 97.5
(START TEST)
NET Status: OK (RESET ERRORS)
DTE Status: OK
Near Loops: -------/-------/-------/-------
Far Loops: -------/-------