Multitech MT56DSU-R Manual do Proprietário descarregar pdf (Página 39)

Chapter 4 - Troubleshooting

4.3.5 DSU Loopback Test

This test lets you verify proper MT56DSU-R operation by matching

a transmitted signal to the "looped-back" receive signal. Refer to

Appendix B for cable description.

1. Obtain a DSU Loopback cable (CADSURLB) from Multi-Tech, or

assemble one. Refer to Appendix B for instructions on building

the Loopback cable .

2. Plug the Loopback cable into the DB9 connector on the DSU

being tested.

3. If you send data from your DTE, it should be "looped back" to

your DTE. If you have access to a Bit Error Rate Tester, this

can be used in place of the DTE.

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Multitech MT56DSU-R Manual do Proprietário Página 39