AREA NODE
Function. The area node primarily consists of an AN/TTC-39D switch and its associated multichannel link assemblages. Area nodes serve as central access points for the medium and small extension nodes. Each area node operates as an automatic switching point that receives traffic and routes it to other nodes. Node management is performed from a communications system control element (CSCE), AN/TYQ-31. See Figure 3-26.
Figure 3-26. Typical TRI-TAC area node.
Nomenclature
- SWITCH: AN/TTC-39(A/D)(1 ea.)
- MULTICHANNEL TERMINALS: AN/TRC-175 (1 ea.)
- SHF REPEATERS: AN/TRC-138A (2 ea.)
- NODAL MGT FACILITY: AN/TYQ-31 (1 ea.)
- GENERATORS: AN/MJQ-10A 10kW, AN/MJQ-18 10kW
- BIT RATE: 32 kbps/ch / 16 kbps/ch
- AN/TRC-175 FREQ RANGE: 4400 TO 5000 MHz
- AN/TRC-138A FREQ RANGE: 4400 TO 5000 MHz
- AN/TRC-174 FREQ RANGE: 1350 TO 1850 MHz
Connectivity. A standard node configuration terminates four SHF links to other area nodes, four UHF links to small extension nodes, and two UHF links to medium extension nodes. These connect by an SHF radio or cable link to a radio terminal assemblage, AN/TRC-175. It passes the DTGs to the AN/TTC-39D switch which can handle 712 circuits and can switch both analog and digital trunks. The node connects to multichannel TACSAT/ TROPO systems and NATO subscribers using the standard NATO interface device.
Continue with Chapter 3
Table of Contents
Index
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