LARGE EXTENSION NODE
Function. The LEN consists of two shelters, one for switching and one for operations, an LOS(V)4 multichannel terminal, and an NMF. The LEN provides ACUS access to large groups of users in areas where mobility and dispersion are not primary considerations. See Figure 3-6. The LEN usually deploys to support large CPs such as the corps support command (COSCOM) and the DISCOM.
Interconnectivity. Eighty-four of the LEN subscribers install wire from their telephones to the J-1077 and the remaining 80 connect to remote multiplexer combiners (RMCs). These are cabled to the switch that connects to the LOS(V)4 either through CX-11230A/G cables or SHF links. Two LOS shots from the LOS(V)4 provide links to two different NCs. If the situation dictates, a SEN or RAU can connect to the LEN. Like the SEN, the LEN may connect to a multichannel TACSAT and may provide 2- or 4-wire connections for commercial switches.
Node Management. The NMF for a LEN is the same as the NMF for the NC. The SCC-2 connects to the LEN switch by CX-11230A/G cable. The LEN uses the same SICPS configurations as shown in Figures 3-4 and 3-5.
Figure 3-6. Typical LEN configuration.
Nomenclature
- SWITCH: AN/TTC-46
--SWITCHING GROUP: ON/305/TTC-46
--OPERATIONS GROUP: OL/412/TTC-46
- MULTICHANNEL LOS: AN/TRC-190(V)4 (1 ea.)
- SHF RADIO: AN/GRC-224 (2 ea.)
- GENERATORS: PU-751 5kW (1 ea.), PU-753 10kW (2 ea.)
- NODE MGT FACILITY: AN/TSQ-154
- BIT RATE: 512 kbps
- PACKET SWITCH CONNECTIONS: 4 IEEE 802.3 LANs, 7 x.25 HOSTS
- CHANNELS USED: 26 VOICE; 4 PACKET SW; 2 OVERHEAD; 32 TOTAL
Continue with Chapter 3
Table of Contents
Index
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