ADTRAN, Multiplexer, models:

1200287L1	User Manual
1200610L2	User Manual
1202076L1	User Manual
1202155L1	User Manual
Frameport 768	Specifications
ISU 512	Specifications
ISU 512E	Specification Sheet
MX2800 M13	User Manual
MX2800 STS-1	Product Specifications
MX2810 M13	Specifications
MX2820 M13 MUX	Features
MX2820 STS-1 MUX	Features
OPTI-6100 LMX	User Manual
T3SU 300	User Manual
TOTAL ACCESS MX2800	User Manual
TSU 120	User Manual
TSU 600	User Manual
TSU LT	User Manual
Total Access 1248	Installation And Maintenance Practice
Total Access OC-3 L3	Installation And Maintenance Practice