Verilink PRISM 3001 (34-00186) Product Manual - Manual (Page 44)

4-10 T ERMINAL O PERATION
Maintenance
Screen The Maintenance screen (Figure 4-6) allows the user to perform test and
maintenance functions on the T1 circuit. The line may be taken out of service by
inducing loops at each end. BERT is performed with on-board test facilities.
Therefore, no other test equipment is needed. Actions initiated by each field are
detailed in the following paragraphs.
Clear
Tests
Pressing Enter on this field clears all tests and any line loops that have been
initiated.
Clear Alarms Pressing Enter on this field causes all near-end alarms to be cleared.
Test Loops Loop status changes can be made only when the BERT function is not in the active
mode.
T1 Loop
This field is used to select the test loops to be initiated. The type of loop is chosen
by toggling the spacebar and is executed by pressing Enter. The normal operating
mode and available loopback options are detailed as follows. The following
numbered paragraphs are indexed to the diagrams in Figure 4-7 and Figure 4-8.
1 Normal Operation: This diagram depicts the units normal operating mode.
2 NET LLB: The network line loopback command loops data received from the
network back toward the network. Received data is passed through to the DTE
ports.
3 NET PLB: The network payload loopback command loops the network data back
toward the network. Framing, CRC, and FDL are regenerated. Framed all ones are
passed to the DTE ports.
Figure 4-6 Maintenance Screen
3001 DSU x.xx/x.xx PRISM 3001 Date: MM/DD/YY
No Far End Response Time: HH:MM:SS
----------------------------- ELEMENT MAINTENANCE ------------------------------
ELEMENT: (Element 34 ) ID: 34
BERT: [T1 NET ]
(CLEAR TESTS) Pattern: [CLEAR]
(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: [One NEAR ] Errored Seconds: 3
Port Unloop: [One NEAR ] % EFS: 100
(START TEST)
NET Status: OK (RESET ERRORS)
DTE Status: OK
Near Loops: -------/-------/-------/-------
Far Loops: -------/-------