Confirm your model
Furuno FELCOM70 · Fleet F77 · OME-56340-C1 · 2005-07-26 · FELCOM70 / ISDN. Historical FELCOM 70 Fleet F77 guidance, OME-56340 C1, 2005-07-26. Mackay’s 2017-12-13 bulletin listed 2020-12-01 as Fleet 77 service termination. Preserve records; this is not current service or activation evidence.
How it connects
Record the existing handset’s provider, ocean region, message and power indication separately. Do not assume the FELCOM 30/50 LED table matches this communication unit. Do not operate Priority Call, Distress Test, Test Buzzer or the Distress Alert Unit. Leave cables and power unchanged; make no test calls. Phone setup > SW version reports handset software; Information > Version Info concerns system components. Record them separately. Read existing Alarms & Msgs, Alarm 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 ↓