Looking for Documentation and info for a TA-814/G secure Autovon set

[paul-f]

see: http://www.paul-f.com/weAutovon.html#TA-814G

   U.S. Army TA-814/G Secure Phone

   Modified Western Electric 3568HT AUTOVON set with Roanwell Confidencer handset. The network and ringer have been replaced with a metal box and sonalert. It would be interesting to learn what's inside and find operating instructions.

   Keys marked SYNC ALM, SECURE and PRE-EMPT

   From internet searches, it may be documented in TM 11-5805-570-15 (NAVELEX 0967-291-5013, TO 31W2-2G-71)
Operator's, Organizational, Direct Support, General Support and Depot Maintenance Manual for Telephone Set TA-814/G. I haven't found an on-line copy yet.

   Please let me know if you have or find a copy of this or any other info on the set.