Black Box Modem MD885A-R3 Manual do Utilizador descarregar pdf (Página 128)

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7.0 Diagnostics

From page 2 of the MAIN MENU, select RMT. Then select TEST.

From the REMOTE TEST menu, select RDL.

From the REMOTE DIGIT LOOP screen, select ON to activate the test. The

status screen is displayed as the test is being conducted. Make sure that test

data is being generated and watch for data errors. By transmitting test data

and comparing it with the received copy, you can make sure the Modems

and the telephone line are working.

To end the test, press the ENT pushbutton to return to the REMOTE DIGIT

LOOP screen. Then select OFF.

7.8.2 R

EMOTE

IGITAL

OOPBACK

ELF

-T

EST

(RDLST)

The RDLST allows testing of the local modem, remote modem, and

telephone line from the local site (as did the previous test). However,

test data is generated by internal modem circuitry as opposed to a DTE

or external BERT. Figure 7-7 shows the connections automatically made

during the test.

In Hayes mode only, initate the RDLST using the command &T7 (AT &T7).

In any mode, initate the RDLST test from the front panel.

Both modems must be on-line. From the second page of the MAIN MENU,

select RMT. Then, select TEST. From the REMOTE TEST menu, select

RDLST.

From the RDL SELFTEST screen, select ON to activate the test. The status

screen is displayed as the test is being conducted. If "ER" is present on the

status screen, the modem is detecting errors. If numerous errors are detected,

take steps to try to identify their source.

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Black Box Modem MD885A-R3 Manual do Utilizador Página 128