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ZOOM® ComStar™ XT SVD Speakerphone/Voice FaxModem
A Complete Communications Center For Your Computer!©

ComStar XT SVD is a complete communications center for IBM® PC-compatible and Macintosh® computers. The ComStar XT SVD external Speakerphone/FaxModem combines a full-featured 33,600 bps V.34 faxmodem with 14,400 bps fax, full-duplex speakerphone, digital answering machine, voice mail system, and convenient speed dialer.

The ComStar XT SVD features extended status reporting with 14 LEDs. It is serial "Plug and Play" compatible with Windows® 95 and the new generation of Plug and Play computers, and also connects to a Macintosh serial port. ComStar is also available as an easy-to-install single-slot card that is software configurable and Plug and Play compatible with Windows 95. All ComStar models come complete with a high-quality microphone and speaker, and all necessary software.

ComStar XT SVD 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.


  • Speakerphone: Get the convenience of hands-free, full-duplex telephone conversations and professsional quality conference calls. Complete with high-quality microphone and speaker.
  • Data Modem: Connects at 28,800 bps with V.34, the fastest international standard, and 33,600 with enhanced data throughput - perfect for connecting to the Internet, remote access to other corporate locations, bulletin boards, and on-line services. Features V.42bis, V.42, MNP® 2-5, and advanced MNP 10ECTM for fast, error-free file transfers.
  • 14.4 Fax: Send and receive great-looking high-resolution faxes at your PC. Faxback and fax-on-demand can improve your productivity and present a more polished image.
  • Serial Plug and Play: Automatic configuration with Windows 95 on Plug and Play compatible computers.
  • Voice Mail and Digital Answering Machine: A powerful and easy-to-use multi-mailbox answering system for a professional image at home or at the office.
  • Speed Dialer: Fast and easy "point-and-click" directory dialer.
  • Distinctive Ring: Share voice, fax, and data communications on a single phone line (requires local telephone company support).
  • Advanced lightning and surge protection.


Data speeds and protocols

  • Enhanced data throughput - 33,600/31,200 bps data
  • V.34 - 28,800/26,400/24,000/21,600/19,200/16,800/14,400 bps data
  • V.Fast Class - 28,800/26,400/24,000/21,600/19,200/16,800/14,400 bps data
  • V.32bis - 14,400/12,000/9600/7200/4800 bps data
  • V.32 - 9600/4800 bps data
  • V.22bis - 2400/1200 bps data
  • Bell 212A, V.22A/B, V.23 - 1200/600 bps data
  • Bell 103, V.21 - 300 bps data

Send/receive fax speeds and
protocols, all models

  • Group 3, Class 1 fax
  • V.33, V.17 - 14,400/12,000
  • V.29, V.17 - 9600/7200
  • V.27 ter - 4800/2400
  • V.21 channel 2 - 1200/300

Command set:

Hayes AT-Command compatible, with extended MNP®5, MNP 10, and V.42bis commands

Error correction:

V.42/LAPM and MNP 2-4; MNP 10 data throughput enhancement; MNP 10EC Enhanced Cellular

Data compression:

MNP 5, V.42bis

Voice encoding:

Enhanced ADPCM, programmable at 2 or 4 bits per sample

Business audio mode:

Monophonic record/playback using 8-bit encoding at 11.025 kHz or 7200 Hz


Full-duplex with microphone and speaker included; headset capability


Serial Plug and Play

Hardware Features, all models

  • Dual RJ-11 telephone jacks- one for phone line, one for optional phone
  • Software volume control
  • 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
  • Handset record and playback

Dimensions and Power Requirements

  • 6.25 in. W x 6.6 in. L x 1.5 in. H
  • Power supply cube: 120 VAC, 60 Hz input; 9 VDC, 600 mA nominal output. UL Listed

System Requirements (PC)

  • 486 or faster PC compatible computer with 1 available serial port (16550A UART recommended)
  • 8 MB RAM
  • 3.5 in. floppy drive
  • Hard drive with 5 MB available
  • Microsoft Windows 3.1 or higher
  • Mouse recommended

Certifications and Warranty

  • FCC Registered (Part 68) and Certified (Part 15B)
  • Recognized to U.S. and Canadian requirements under the Component Recognition Program of Underwriters Laboratories, Inc.
  • Warranted against defects in material and workmanship for a period of seven years from the date of the original retail purchase

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 and Zoom/FaxModem are trademarks of Zoom Telephonics, Inc. Microsoft and Windows are registered trademarks of Microsoft Corporation. MNP is a registered trademark and MNP 10EC is a trademark of Microcom.

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

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