Specifications

Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual
4-20 Diagnostic Functions MPW-1 MP-4100 Ver. 2.0
Megaplex-4100
Pseudowire
Cross-Connect
Matrix
MPW-1 Module
TDM
Cross-Connect
Matrix
Packet
Processor
Ethernet
Switch
To PSN
To TDM
Buses
Figure 4-1. Local Loopback on Selected Internal DS1 Port Timeslots, Signal Paths
For the supervision terminal, use the following procedure to activate/deactivate a
local loopback on a selected timeslot (for detailed instructions, refer to the
Megaplex-4100 Installation and Operation Manual ):
1. Open the Diagnostics > Physical Layer > I/O menu, and then select the I/O
slot of the desired MPW-1 module. The selection screen displays only
modules installed in the Megaplex-4100.
2. On the module Diagnostics > Physical Layer > I/O > Port screen, select the
MPW-1 port to be tested, in the range of Int DS1 1 to Int DS1 8. Only
connected ports can be tested.
3. If necessary, select the loopback duration on the Diagnostics >
Physical Layer > I/O > Time Out screen. The loopback will be automatically
deactivated after the specified interval.
4. To activate (start) a loopback on a selected timeslot, select Loop Per Timeslot
on the Diagnostics > Physical Layer > I/O > Test Type screen, and then press
<Enter>.
5. You will see now the timeslot test selection screen. The screen includes the
list of timeslots of the selected port (link), presents information on the
destination of each timeslot and the traffic type, and in addition includes a
test selection field: when this field is selected, you have the option to
activate a Local Loop.
6. At this stage, type T to activate the test.
7. To manually deactivate (stop) the loopback, select None for the timeslot, and
then type T to deactivate the test.