Zyxel-communications U-336SA Manuel d'utilisateur télécharger pdf (Page 142)

128 Diagnostics & Troubleshooting

10 Diagnostics &

Troubleshooting

Diagnostics

The U-336S/SA is equipped with several diagnostic capabilities:

• Power-on Self Test.

• Analog Loop-back Test.

• Analog Loop-back with Self-Test.

• Local Digital Loop-back Test.

• Remote Digital Loop-back Test.

• Remote Digital Loop-back with Self-Test.

The diagnostic tests listed above apply to several modes of operation:

asynchronous or synchronous, error controlled or non-error controlled,

data compression enabled or disabled data mode. You can use these

capabilities to verify the line condition and the modem's functioning and

performance, and to locate the source of a communication problem.

Power-On Self Test

At each power-up or upon a reset command from the panel, the

modem will test the ROM code checksum, system RAM memory, DSP

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Zyxel-communications U-336SA Manuel d'utilisateur Page 142