Black Box products can be conveniently purchased through a broad range of qualified distributors and resellers located around the globe

Black Box Explains...     
Terminal Servers
A terminal server (sometimes called a serial server) is a hardware device that enables you to connect serial devices across a network.

Wireless Console

These advanced console servers feature dual Ethernet ports 3G cellular access to ensure high availability and redundancy.

LES1300 Series Advanced Cellular Console Server
The integral GSM modem enables you to reach serial devices even if they're not networked or if the network goes down.
LES1400 Series Advanced Cellular Console Server
Advanced Cellular Console Servers include dual 10/100 Ethernet ports, a CDMA modem, and a redundant AC power supply.