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CHAPTER 2: Installation and Connection
Note: Appendix A lists some basic and specific troubleshooting
actions to take if your Modem is not operational.
2.3 Is Your Series II Modem Ready for Use?
As soon as you connected power to the modem, it performed a
diagnostic self-test. The speed indicators flashed in sequence for
approximately four seconds, then the 28.8 indicator is lit. The TR
indicator should be lit as well. The SD, RD, CD, and OH indicators
should remain off at this time. If not, check that the transformer is
solidly connected and that your AC outlet is live.
If you’re an experienced modem user, you may simply want to check
your modem’s settings for data compression, error correction, and so
on. You may find that you can get moving quite quickly if you just issue
an ATL5, ATL6 and an ATL7 command. These commands lists how
your modem is currently configured. If you come across a setting you’re
unsure of, refer to Chapters 5 and 6 of this manual for AT command
and S-Register explanations and defaults.
If you’re a novice, please continue to the next sections of this chapter.