28 circuits interrupted; w/cover, plastic; operation power rqmt, ac, 10v, 60 cycles, single phase; cam data, 15 rpm and 60 rpm, 1 sec ringing time, 3 sec silent time; 2.250 in. By 3.313 in. By 4.031 in. O/a dim.; plugs into a 21 contact socket
An item which is used with automatic ringing in telephone circuits to provide fixed ringing and nonringing periods. It is usually motor driven.
Classification: Articles designed for connection to telegraphic or telephonic apparatus or instruments or to telegraphic or telephonic networks
NSN 6320-01-350-5570
NSN 4140-01-100-6160
NSN 5998-00-560-2302
NSN 5855-00-149-0766
NSN 5965-01-266-7968
NSN 5985-00-163-9180
NSN 6645-01-495-0939
NSN 5920-01-597-1492
NSN 5930-01-181-9019
NSN 5998-01-382-8842
NSN 6610-00-553-5103
NSN 5950-00-764-2073