Zoom V.34 External FaxModem¶

• Table of contents
• Zoom V.34 External FaxModem
  • Hardware
    • Pictures
  • AT-Commands

A V.34 faxmodem made by Zoom Telephonics, Inc.

Website
https://web.archive.org/web/19970131174726/http://www.zoomtel.com/products/countries/germany.html
https://web.archive.org/web/19970131202809/http://www.zoomtel.com/products/international/v34e.html

Manuals and Support tools
https://web.archive.org/web/19971015093759/http://www.zoomtel.com/files.html

Manuals

• Zoom V.34 owners manual V32BIS.MAN
• V.34 Quick Start Guide V34-Quick_Start_Guide.pdf
• Hints for using Zoom modems in Unix computer systems unix.txt
• AT Commands: AT_Commands_for_RCV56ACx_RCV336ACx_RCV288ACx_and_RCV144ACx_Modems-Reference_Manual.pdf

Hardware¶

Supply Voltage	10V AC
Power Consumption	~7.0W
RS232 Connector	DB25
Line Connector	RJ11

Pictures¶

We can see here

• Rockwell RC288DPi R6682-26 (Modem Data Pump) RC288DPI.pdf
• Rockwell L39W/U L3903-53 921 B12029-3 (Microcontroller)
• Winbond W24257AK-15 (SRAM)
• ATMEL AT27C010 (EPROM)
• ATMEL 24C16 (EEPROM)
• Philips 74HCT164N (8-bit serial-in, parallel-out shift register)
• 2x TI DS14C88 (Quad CMOS Line Driver)
• 1x TI DS14C89 (Quad CMOS Receiver)
• 1x TI SN74HCT244 (Octal Buffers and Line Driver)
• 1 x LHI521 AB 9548H

Label PCB

  54034 V34XG
  1.1B AD640

AT-Commands¶

Informational commands

ATI
28800

OK
ATI1
255

OK
ATI2
OK
ATI3
V1.440-V34_DS-a Z201

OK
ATI4
a007840284C6002F

bC60000000

r1005111151012000

r3000111170000000

OK
ATI5
006

OK
ATI6
RC288DPi Rev 05BA

OK
ATI7
000

OK