Manuals and User Guides for AT&T MERLIN LEGEND. We have 27 AT&T MERLIN LEGEND manuals available for free PDF download: Installation & Maintenance Manual, System Reference Manual, Planning Manual, Key System Planning, User Manual, Reference, Data Manual, System Manager's Manual, Operation Manual, Operator's Manual, Supervizor's Manual, Pocket Reference, Quick Reference, Feature Summary, Data Planning Forms, Frequently Asked Questions