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COMSPHERE 3550 Series Data Service Units
3-12 March 1999 3550-A2-GB20-30
Other Tests
The following lists the tests available on your DSU.
Refer to the Test Branch section of Chapter 4 for further
test information, as well as more detail on how to
configure and operate the DSU. Refer to Appendix A to
determine how best to access each test.
• Device Test (Devic)
• Local Loopback (LL)
• DTE Loopback (DTE)
• Digital Loopback (DL)
• Remote Digital Loopback (RL)
• Bilateral Loopback
• Digital Test (DT)
• End-to-End Test (EE)
• Bit Error Rate Test (BERT)
• Lamp Test (Lamp)