Verilink DIU 2130 (880-503297-001) Product Manual - Manual (Page 74)

56K NMS Option Overview
6-14 Verilink
Managing Loopbacks
Loopbacks are used for sending and receiving test patterns on a
circuit. The 56K NMS Option provides different types of loopbacks,
loopback modes, and test patterns. Once the loopback is
established, you can send the test pattern from the near end unit.
This section describes how to select a loopback and configure its
loopback mode.
Types of
Loopbacks
The 56K NMS Option provides the following methods of activating
the DIU 2130 bidirectional DTE loopback:
• DDS Latching Loopback (OCU, CSU, DSU)
This loopback is discussed in a separate subsection below.
• ITU-T V.54 (useful in DDS mode)
• Local DTE loopback
• Remote RL lead loopback
836 Port 2 Unassigned Mux Channel Alarm Cleared
837 Port 2 MJU Alert Exceeded Alarm
838 Port 2 MJU Alert Exceeded Alarm Cleared
839 Port 2 Test Code Exceeded Alarm
840 Port 2 Test Code Exceeded Alarm Cleared
841 Test Alert (TA) Port 2
842 Test Alert (TA) Port 2 Cleared
843 Port 2 Block Exceeded Alarm
844 Port 2 Block Exceeded Alarm Cleared
845 Port 2 Release Exceeded Alarm
846 Port 2 Release Exceeded Alarm Cleared
847 Port 2 Looped Alarm
848 Port 2 Loop Cleared
849 Far Port 2 Looped Alarm
850 Far Port 2 Loop Cleared
851 Port 2 Test Signal Alarm
852 Port 2 Test Signal Cleared
1013 Low Battery Alarm
Table 3 DIU 2 130/DDS Alarm Codes
Alarm Code Description