Multitech MultiModem ZDX Series User Manual page 10

Voice Connections (Voice option only)
(Optional) Connect the Modem to the Phone
For voice-only calls, plug a phone into the modem's PHONE jack.
Connect the Microphone
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 (3.5mm) mini plug. Do not use
a monophonic microphone.
Connect the Speaker
For speakerphone or voice mail applications, use a 1/8-inch (3.5mm) 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 amplified speaker directly into the SPKR jack.
Multi-Tech Systems, Inc. MT5656ZDX User Guide
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Voice Connections for Voice Models
Chapter 2 – Hardware Installation
10