Automatic Telephone Central Office, AN/TTC-39A(V)1

JAN Type: AN/TTC-39A(V)1
Nomenclature: Automatic Telephone Central Office
Reference: TM 11-5805-747-12-1
NSN: 5805-01-241-9710
Components: S-280B/G Switching Module Assembly, ON-224/T Master Power Distribution Unit, MJQ-10A Electric Power Unit, S-640 Storage Shelter, S-639 Maintenance Shelter
Power Input: 120/208 VAC 50, 60 or 400 Hz, 3-Phase
Description: The AN/TTC-39A(V) is modular/transportable switching communications and nodal control equipment that provides secure automatic switching and technical control for both digital and analog communications. It is a hybrid circuit switch, with a 744-line capacity (96 analog and 648 digital). The facility provides technical control functions including channel reassignment and multiplexing, line testing, engineering orderwire, atomic timing standard, and analysis or trouble reports, alarms, and system data. It signals and supervises analog and digital trunks and lines. This includes 20 Hz/1600 Hz ringdown, DC closure, dial pulse, DTMF, and 6-wire E&M using tone burst, confirmation, non-confirmation, common channel, and digital in-band-trunk signaling (DIBITS). One 5-ton truck for TTC-39A, 2 ea 2-1/2-ton trucks for S-639 and S-640 shelters.
Source: FM 24-24, 94
Created: Wed Dec 6 12:41:51 2000
Last Modified: Wed Dec 6 12:41:51 2000

Automatic Telephone Central Office, AN/TTC-39D

JAN Type: AN/TTC-39D
Nomenclature: Automatic Telephone Central Office
Reference: TM 11-5805-778-12-1
NSN: 5805-01-315-3751
Components: S-280B/G Switching Module Assembly, ON-224/T Master Power Distribution Unit, MJQ-10A Electric Power Unit, S-640 Storage Shelter, S-639 Maintenance Shelter
Power Input: 120/208 VAC 50, 60 or 400 Hz, 3-Phase
Part of: TTC-39D
Description: The AN/TTC-39D is a modular and transportable nodal control mobile subscriber access circuit switch designed to provide secure and nonsecure automatic switching and technical control for analog, digital, and mobile subscriber traffic for the US Army. The AN/TTC-39D is a product improvement of the AN/TTC-39A. The AN/TTC-39D is an all digital circuit switch with the capacity to terminate 712 lines (both analog and digital). The AN/TTC-39D also has flood search capability and is totally compatible/interchangeable with fielded MSE. The facility retains minimum essential technical control functions including channel reassignment, multiplexing, line testing, and engineering orderwire. The facility also retains minimum essential technical control functions for atomic timing standards, analysis of trouble reports, alarms, and system data.
Source: FM 24-24, 94
Created: Wed Dec 6 13:23:33 2000
Last Modified: Wed Dec 6 13:23:33 2000


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