MX2800 Multiplexer Chassis
By ADTRAN

Houses hot swappable controller cards - Supports SNMP, Telnet and TL1 management - Quick, easy installation - Connectorized backplane - Capable of back hauling multiple service types (T1/E1) - Houses dual load sharing redundant power supplies ... 

MX2800 M13 MUX Redundant 24V-with Fan
By ADTRAN

ADTRAN has applied its industry-leading carrier-class expertise to the MX2800 M13 DS3 multiplexer, creating a product that meets the most stringent carrier-class requirements. The MX2800 offers bandwidth consolidation at a low price and in the smallest footprint available in the industry. The equipment meets stringent NEBS Level 3 requirements and is backed by a 10-year warranty. ... 

MX2820 19 Chassis with SCU and Twelve MUX Cards
By ADTRAN

The MX2820 system with a 19-inch chassis houses up to 14 MUX modules to provide seven redundant M13/STS-1 modules in 2U rack units of space. The MX2820 MUX modules are capable of combining independent T1s, E1s, or T1s and E1s on the same DS3/STS-1 signal. Each pair of MUX modules provides built-in 1:1 redundancy on the DS1 and DS3/STS-1 circuits. ...