Efficient Networks, Modem, models:

5100-a	Troubleshooting And Setup Manual
52609x02	Installation Manual
5260MC02A	Installation Manual
Macintosh Efficient Networks 5260	Installation Manual
SpeedStream 3000 Series	Installation Manual
SpeedStream 4000	Installation Manual
SpeedStream 4000 Series	Quick Start Manual
SpeedStream 5100 Series	User Manual
SpeedStream 5200 Series	Quick Start Manual
SpeedStream 5251	Quick Start Manual
SpeedStream 5667	Quick Start Manual