Specifications

Chapter 5 Diagnostics MX-2100/2104 Installation and Operation Manual
5-2 Diagnostic Tests
• ML - Control and indication of main link loops:
− Local main link loop
− Remote main link loop
− Local ITU-T Rec. V.54 loop
(ITU-T Rec. V.54 loop 2)
− Remote ITU-T Rec. V.54 loop
(ITU-T Rec. V.54 loop 3).
• i:j - Control and indication of channel loops and tests (i indicates the module
slot number, and j indicates the module channel number):
− Local channel loop
− Remote channel loop
− Tone injection (for voice channels only)
− PRBS (pseudo-random sequence) transmission, for data channels only
− BERT (bit error rate test), for data channels only. Can be performed only if
downloading is enabled.
In addition, you can see the test state at the remote MX-2100. This function is
available only when downloading is enabled.
Special Considerations
When using the MX-2100 diagnostic functions, pay attention to the following
points:
• When you select a channel for monitoring, the monitoring of any previously
selected channel is automatically interrupted.
• Generally, at any time, only one loop of a given type can be activated on the
main link, and on each of the user channels. However, the signal paths formed
when certain loops or tests are active inherently disconnect the signal paths
required by other loops.
As a typical example, consider the case of a main link remote loop: if such a
loop is activated on the local MX-2100 in response to a command sent
through the management channel by the remote MX-2100, then the operator
of the local MX-2100 can no longer activate a local main link ITU-T Rec. V.54
loop.
• On the local MX-2100, the following combinations of loops are not possible:
− Simultaneous activation of local and remote main link loops
(CONFIG ERROR 3)
− Simultaneous activation of main link ITU-T Rec. V.54 loop 2 and loop 3
(CONFIG ERROR 3)
− Simultaneous activation of local and remote loops on the same channel
(CONFIG ERROR 4)