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Zoom® ComStar™ 56K SpeakerPhone/FaxModem
A Complete Communications Center For Your Computer!

The Zoom ComStar 56K Model 2818 for PC-compatible computers combines a full-featured V.34 modem capable of 56,000 Kbps Internet and central site downloads with a powerful voice mail system, digital answering machine, 14,400 bps fax, convenient speed dialer, and a synchronous interface supporting the ITU H.324 videophone technology standard. It is Plug and Play compatible for easy installation under Microsoft® Windows® 95 and is also software configurable.

The Zoom ComStar 56K comes complete with a high-quality external microphone and speaker. It comes with Cheyenne® BitWare® Fax/Voice/Data for Windows; ZOOM/LINK® CD-ROM with modem-enabled games, conferencing software, support information, and more.

About the Zoom ComStar 56K

Zoom ComStar 56K Speakerphone/FaxModem transforms your ordinary computer into an extraordinary telecommunications tool. ComStar 56K (internal) Model 2818 for PC-compatible computers is a high-speed V.34 faxmodem that can download data from compatible sites at speeds up to 56,000 bps and at higher speeds with compression for fast Internet and LAN access. It combines a full-featured K56flex™ faxmodem, 14,400 bps fax, and full-duplex speakerphone over conventional telephone lines and features flash memory and reprogrammable DSP for downloading feature enhancements and upgrades to future standards with simple software commands. Other advanced features include a synchronous interface supporting the ITU H.324 videophone technology standard,* digital answering machine, voice mail, convenient speed dialer, and Plug-and-Play compatibility for easy installation. The Zoom ComStar 56K comes complete with a high-quality external microphone and speaker, and all necessary software.

ComStar 56K is built in the U.S.A. by Zoom Telephonics, Inc., a leading supplier of telecommunications equipment since 1977 and is backed by Zoom's outstanding 7-year warranty.


  • K56flex technology for 56,000 bps data downloads from compatible sites
  • 33,600 bps V.34 data transmission speed
  • 14,400 bps Group 3, Class 1 and 2 fax
  • V.42bis and MNP 5 compression for data speeds up to 230,400 bps
  • Reprogrammable Digital Signal Processor (DSP) enables easy software upgradeability to assure superior interoperability and overall performance and easy upgrades to future standards.
  • Flash memory for easy firmware upgrades
  • 56K Faxmodem: Connect to the Internet, World Wide Web and on-line services, and download files fast and error-free at up to 56,000 bps with K56flex, the joint development of Rockwell and Lucent Technologies. Send "printer-quality" faxes direct from your PC, plus faxback and fax-on-demand.
  • Speakerphone: For "hands-free" communications and conference calls. True full-duplex speakerphone lets callers on both ends talk at the same time for natural conversation.
  • Videophone-Ready: Supports the ITU H.324 video technology standard and H.324 compliant software from Intel, PictureTel, VDONet, Smith Micro, and others.*
  • Digital Answering Machine: An easy-to-use personal answering machine with high-quality recording and playback, pager notification, and other advanced features.
  • Voice Mail: A full-featured, configurable voice mail system for home or office with multiple mailboxes, fax-on-demand, and remote retrieval of messages.
  • Other Features: Plug-and-Play with Windows 95 computers (software configurable also), VoiceView® compatibility, Directory Dialing, Distinctive Ring,** Caller ID,** and ZoomGuard lightning protection.

Technical Specifications

Data Speeds:
  • 300 to 33,600 bps full-duplex with international standards
  • Up to 56,000 bps receive/33,600 bps send with K56flex
Fax Speeds:
  • 300 to 14,400 bps
  • Group 3, Class 1 and Class 2
Standards Supported:
  • Data: K56flex, V34, V.32bis, V.32, V.22bis, V.22 A/B, V.22, V.23, V.21, Bell 103/212A
  • Fax: V.33, V.29, V.17, V.27ter, V.21 channel 2Compression: V.42bis, MNP 5
  • Error Control: V.42, MNP 2 - 4, MNP 10 and MNP 10EC
  • Plug and Play
  • AT and extended AT command set compatible
Command Set:
Hayes AT-Command compatible, with extended MNP 5, MNP 10, and V.42bis commands
Voice Encoding:
Enhanced ADPCM, programmable at 2 or 4 bits per sample

Full-duplex with microphone and speaker included; headset capability; software volume control

Plug and Play; COM1 - COM8, IRQ, 3, 4, 5, 7, 9, 10, 12, 15 supports TAPI
Videoconferencing enabled:
Synchronous interface supports ITU H.324 standard for videoconferencing applications.*
Hardware Features:
  • Dual RJ-11 telephone jacks one for phone line, one for optional phone
  • Output jack for external 8 ohm audio speaker (8 ohm external speaker included)
  • Input jack for external microphone (microphone included)
  • Jumper-selectable electret microphone bias
  • Telephone cable with RJ-11 connectors
  • Buffered 16550 UART to reduce PC interrupts and boost performance
  • Handset record and playback
Dimensions and Power Requirements:
  • Dimensions: standard IBM PC board 2.7 in. W by 5.4 in. L by 0.75 in. H (fits 16-bit PC-compatible slot)
  • Power consumption: 1.5W typical
System Requirements:
  • 486 or faster PC compatible computer with 1 available 16-bit ISA slot
  • 8 MB RAM
  • 3.5 in. floppy drive
  • Hard drive with a minimum of 5 MB available
  • Microsoft Windows 3.1 or higher
  • Mouse recommended
Regulatory Approvals:
  • FCC Parts 15B and 68
  • UL, C-UL
  • Industry Canada
Warranted against defects in material and workmanship for a period of seven years from the date of original retail purchase

* Requires video camera and video capture support, sound card with microphone input, ITU H.324-compliant videoconferencing application, and appropriate computer and operating system to run the application.

** Requires Distinctive Ring or Caller ID support from local telephone company.


Zoom Telephonics, Inc.
207 South Street
Boston, MA 02111
Fax: 617-423-3923
Web Site: www.zoomtel.com
NASDAQ: ZOOM  Zoom is a registered trademark and ComStar, Zoom/FaxModem, ZoomGuard are trademarks of Zoom Telephonics, Inc. K56flex is a trademark of Rockwell International Corporation and Lucent Technologies, Inc. Windows is a registered trademark of Microsoft. MNP is a registered trademark and MNP 10EC is a trademark of Microcom Inc. All other registered trademarks and trademarks are the property of their respective owners.

Made in the U.S.A.
©2000 Zoom Telephonics, Inc.

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