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Chapter 2 - Installation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide 11
Connect a Microphone (Voice Option)
For voice mail or speakerphone applications, plug an unamplified microphone into the MIC jack on
the side of the modem. The microphone should have a stereo 1/8-inch mini plug. Do not use a
monophonic microphone.
Connect Speakers (Voice Option)
For speakerphone or voice mail applications, use a 1/8-inch plug male-to-male stereo patch cord
to connect the SPKR jack on the side of the modem to the LINE IN jack on your sound card. If your
sound card does not have a LINE IN jack, use its MIC jack. The stereo male-to-male patch cord
can be purchased at a local PC retail store.
If you do not have a sound card, you can plug an unamplified speaker directly into the SPKR jack.
Connect the Modem to the AC Power Outlet
The power switch is located on the right side of the modem. Make sure it is set to OFF. Plug the
universal power supply into the PWR jack on the modem. Then plug one end of the country-
specific power supply cord into the universal power supply and the other end into a power outlet or
power strip.
Note: Use only the power supply supplied with the modem. Use of any other power supply voids
the warranty and can damage the modem.
Power-On Test
Test the modem by turning it on. When you turn it on, the modem performs a
diagnostic self-test, after which the 56 indicator should light. If this does not happen, check that the
power switch is on, the power supply is solidly connected, and the AC outlet is live. If these
measures do not work, see Chapter 7, “Troubleshooting.”
Surge Protectors and Lightning
Your modem has automatic, self-resetting protection to protect it from lightning-induced electrical
spikes on the telephone line. Nonetheless, large power surges and nearby lightning strikes can
damage or destroy your modem. Therefore, we recommend that you plug the modem into a surge
protector rather than directly into a wall outlet, preferably a surge protector that provides protection
against electrical spikes on the telephone line as well as on the power line. Note that not even a
surge protector can guard against damage from a nearby lightning strike. During an electrical
storm, it is safest to unplug your computer equipment from both the power outlet and the telephone
line.