Name: Comsphere 3921 33.6k RackMount Modem
Brand: Zhone
Price: 189.95 USD
Availability: InStock

Zhone 3921-B1-011 Comsphere 3921 33.6k RackMount Modem

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$189.95

Ships from outside of the USA. Please allow up to 2 weeks for delivery.

In Stock: 5
Manufacturer: Zhone
Model or Part: 3921-B1-011
Condition: New
Weight: 4.00lb
Dimensions: 18.00in x 14.50in x 2.00in

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Product Information

Item Condition

New - Sealed or Open Box Condition
Excellent - Almost-New, Missing Original Packaging
Refurbished - Seller Refurbished, Good Condition, Previously Used Item

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Description

Overview

The Zhone Comsphere 3921 33.6k RackMount Modem (part number 3921-B1-011) is a rugged, high-performance modem designed for demanding carrier and enterprise environments. Engineered to deliver reliable 33.6 kilobits per second data transmission over traditional telephone lines, this rack-mountable device provides a solid foundation for legacy network integration, backup connectivity, and remote site access.

Key Features

33.6k data rate compatible with standard PSTN lines
Rackmount form factor for easy installation in 19 inch equipment racks
Built-in diagnostic LEDs for quick status monitoring
Supports both analog and digital voice channels
Robust power supply with optional redundant power input
Configurable via web interface or command line for flexible management

Technical Specifications

Model: 3921-B1-011
Manufacturer: Zhone
Data Rate: 33.6 kilobits per second
Interface: RJ11 line ports, RJ45 console port
Power: 110-240 VAC, 50/60 Hz, optional redundant power
Dimensions: 1U rack height, 17.5 inches width, 8.5 inches depth
Operating Temperature: 0 to 40 degrees Celsius
Storage Temperature: -20 to 70 degrees Celsius
Compliance: FCC Part 68, CE

Applications

This modem is ideal for telecom carriers maintaining legacy circuit-switched services, enterprises requiring a backup data path during broadband outages, remote offices that rely on dial-up connections, and industrial sites where a simple, dependable link to central systems is essential. Its durable construction and easy rack integration make it a trusted choice for mission-critical environments where uptime and simplicity are paramount.