Verilink FrameStart FSD (34-00291.F) Product Manual - Manual (Page 34)

28 D D S C S U / D S U a n d T 1 C S U / D S U a n d F r a m e S t a r t F S E
Monitor Mode. When the unit is in monitor mode (LM) and LMI Mode is
configured for MON, individual selection of PVC discovery and delay is
allowed by pressing SELECT while in the DLCI screen. Test DLCI xxx? is
displayed. Pressing SELECT performs the test as follows. The unit sets up a
mask for this one circuit and sends PVC discovery and PVC delay
approximately every second. This minimizes the traffic disruption on the
circuit. The screen then returns to the previous performance screen where the
fields are updated when the information is collected. Choosing SELECT again
displays End Test? where SELECT stops the test and the unit goes back to
normal operation. If the unit is scrolled to another DLCI and another test is
enabled, the unit stops the test on the existing DLCI and starts the new DLCI.
Pressing SCROLL takes the unit to the previous performance screen.
The SOS message is displayed as shown in Figure 4.4. This allows the user to
view the local and remote DLCI and unit ID numbers for fault isolation. As
new circuits are added, information is displayed as shown in Figure 4.4.
Figure 4.4 Example DLCI Total Screen in Test
Maintenance
The Maintenance menu allows performing loop tests, BERT functions, and
error counts on the circuit. Loops, BERTs, and error counts are activated and
cleared from the unit. No other test equipment is needed.
Loop
This menu allows running diagnostic loop tests on the network. Figure 4.5
shows normal operation.
Figure 4.5 Normal Operation
None. Selecting NONE leaves the unit in normal operation and forwards the
unit to BERT.
Enable LLB (DDS CSU/DSU only). (Line Loopback) - As shown in
Figure 4.7, the received network signal is looped back toward the network.
0037 -> ACT.---
----mS
New Circuit
RCV SOS
IN TEST
Monitor Status
This message appears when an SOS is
received from another unit.
This message appears when unit is in test.
Network Framer / Receivers/
BERT
DTE
From
NET
To
NET
To
Port
From
Port
(Winchester-type
Connector)
Drivers Deframer Interface
Generator/
Detector
To Network
RJ-48C
From Network