Dte Only; Test Purpose; Interpreting Test Results; Figure 13-7. Dte Only Test Diagram - ADTRAN DSU IV ESP User Manual

Chapter 13. Testing and Troubleshooting

DTE Only

The DTE O
interface drivers and receivers of the local DSU IV ESP plus its loop
transmitter and receiver. For this test, the loop transmit data is
connected to the loop receive data at a point close to the physical
network interface. This test can be used to verify proper operation
between the local DTE and the local DSU IV ESP.
When this test is implemented, the far unit receives an OOS/OOF mes-
sage from the network and enters an alarm state.
DTE
TD
RD

Test Purpose

The DTE O
•
•

Interpreting Test Results

A BERT tester must be used to interpret the test results of a DTE
O
13-12
test provides a method for testing both the DTE
NLY
DSU/CSU
DTE Tx
DTE Rx
test is used for the following purposes:
NLY
Verify integrity of the DTE interface.
Verify integrity of connection between DTE and DSU IV ESP.
test, because the BERT originates external to the local DSU.
NLY
DSU IV ESP User Manual
LOCAL
NET Tx
NET Rx

Figure 13-7. DTE Only Test Diagram

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