This is off-line, Teletype ancillary equipment for use with classified communications equipment. It consists of a XMTR DISTR, Rack, MT-1679/SGA-1, CSP-2699, Switching Unit, CSP-3333, Power Supply, CSP-3334, TTY TT-69A/UG, REPERF TT-159/FG, Mixing REPEATER Unit SSM-3, XMTR DISTR TT-57/UG.

 
Contributors:

1) Nick England <navy.radio(at)gmail.com>
 

Feb 26/15