Zoom 4631-00-21U 4G/LTE/3G Cat 1 Modem | EOL

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Industrial USB modem-uncased, UFL connectors

  • Form Factor: Modem: USB Dongle
  • Technology: 4G LTE Cat 1 w/ 3G Fallback
  • Frequency: 4G: LTE Band 2, 4, 5, 12HSPA 1700/2100/1900 fallback
  • Carrier: AT&T, T-Mobile, Vodafone

The ZoomCell™ line of industrial USB cell modems includes LTE AT&T®, T-Mobile®, Verizon®, and European modems as well as multi-country models. Featuring high-performance RF, antenna, and power supply design, ZoomCell modems are the right choice for many M2M and IoT product designs. The modems' extensive certifications dramatically lower the costs, time to market, and risk associated with incorporating a cellular modem module into your device.

All models include Gemalto Cinterion® modules with high performance and guaranteed availability for many years.


  • Flexible USB modem mounting
    • Plugs directly into the USB port or indirectly via USB cable
    • Easy wall-mount option for cased models
  • Flexible power handling
    • Typically all power is supplied by the primary USB port.
    • Micro-USB jack lets you plug in a 5 V power cube or a second USB port for extra power
    • In some modes, the modem draws between 500 mA and 800 mA. If this is too much for one USB port, use the modem's supplemental Micro-USB power jack or put the modem into a lower-current mode
    • SMA and u.FL antenna options allow fixed or moveable antennas
    • Works with Linux, Mac, and Windows devices, including computers and Raspberry Pi devices
    • Linux and Mac devices don't require extra driver support. InstallShield eases Windows installation.
    • AT command control capability through USB port
  • Built-in Protocol Stack
    • Transparent and non-transparent TCP/UDP client and server
    • HTTP/DNS/Ping/FTP/SMTP client
    • TLS support for TCP/UDP/HTTP/FTP/SMTP
  • On-board Java can execute from non-volatile memory
    • Java support on models 4605, 4606, 4610, 4611, 4625, 4626, 4630, and 4631
  • Built-in SIM connector with auto-detect feature
  • Two LEDs
    • Blue LED for status monitoring
    • Green LED for power
  • Operating free-air temperature: −40°C to 85°C. Note: The maximum operating free-air temperature may be lower or higher, depending on the transmitted power level, average data output speed, duration, and duty rate of data transmission.

More Information
Model Number 4631-00-21U
Brand Zoom
Dimensions 78 mm × 41 mm × 9.5 mm (3.07 in. × 1.61 in. × 0.37 in.)
Temperature –40 °C to 85 °C (–40 °F to 185 °F)
Networking Product Type Modem
Form Factor Modem: USB Dongle
Cellular Technology 4G LTE Cat 1 with Fallback
Frequency Band (4G/LTE/3G) Band 1 (2100 MHz)
Carrier AT&T, T-Mobile, Vodafone
Region North America
Frequency 4G LTE: Band 2, 4, 5, 12 (1900/1700–2100/850/700 MHz)
HSPA 1700/2100/1900 fallback
Chipset Gemalto ELS61
Power 5 V
I/O Interface USB
Interface Connector USB
RF Connector u.FL/IPEX ×2
Certifications CE (EEA), FCC (US), IC (CA)
Carrier Approvals AT&T, PTCRB, T-Mobile, Vodafone
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