Confirm your model
Furuno FELCOM50 · Fleet F55 · OME-56480-B2 · 2005-06-22 · SF-150 / SF-250 / SF-870. Historical FELCOM 50 Fleet F55 guidance, OME-56480 B2, 22 June 2005. Mackay’s 13 December 2017 bulletin listed 31 March 2018 as Fleet 33/55 service termination. Preserve equipment records; these instructions do not establish current service or activation.
How it connects
Identify SF-150 antenna, SF-250 communication unit and SF-870 ISDN handset. On existing equipment, ON means power, 48 VDC means antenna supply and SYNC indicates satellite synchronization in this historical manual. None alone proves usable airtime. The pictured RJ45 ISDN sockets are not Ethernet ports. Do not move cables, power-cycle or make test calls. Phone setup > SW version reports handset software; Information > Version Info concerns system components. Record them separately. Read existing Alarms & Msgs, Alarms List or Info Log without Clear Causes or enabling Diagnostics. Reading an alarm can stop its flashing while the symbol remains if the cause persists. Do not reset, update or restart satellite searches. RS-232 B and RS-422 share a selectable driver. Selecting RS-422 disconnects RS-232 B. Record an already visible choice; do not switch it as a test.
Before buying parts
These are compatibility notes and official reference links. Confirm the fault and exact part before buying.
Model-specific parts: start with the official source
Confirm the exact model and part number with the manufacturer or provider before buying any replacement part or accessory.
Check the model and official instructions ↓