18. AN/TTC-46 large extension node switch.
Status: To be determined; NSN: To be determined
General Information
The large extension node switch (LENS) is configured in two S-250( )/G-the ON-305/TTC-46 switching
shelter and the OL-412/TTC-46 operations shelter. Each shelter is transported to an M-1037 high
mobility multipurpose wheeled vehicle (HMMWV). The LENS is configured basically the same as the
NC switch with the basic difference in termination configuration for trunks and loops. The switching
shelter provides the external interface, circuit switching, and associated functions. The operations
shelter provides the central processing and operator interface functions. Power to both assemblages is
provided by a PU-753/M, 10-kW, trailer-mounted, diesel generator towed by the operations shelter's
prime mover.
Major Components
ON-305
OL-412
Shelter S-250/G
1
Shelter S-250E/G
1
Switch subsystem AN/TTC-46:
LCSP*
1
Switching processor subsystem*
1
Plasma display unit*
1
TDSGM
STED KG-194A
3
Loop key generator KG-112
8
Automatic key distribution control KGX-93
1
Transition unit HGF-93
1
Net control device KYX-15
1
Communications modem
1
VINSON COMSEC KY-57
1
Secure device NRI KY-90
1
Environmental control unit
1
Junction box J-1077/U
8
Intercommunications station LS-147
1
Workstation (UXC-86)
1
DNVT TA-1035/U
1
Super high frequency (SHF) control unit
2
Signal cable CX-4566
2
Intershelter cables
6
Power cables CX-7453 and CX-7705**
1
Packet switch AN/TYC-20
2
* Part of AN/TTC-46
1-25
SS 0029
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