Applies to: SAILOR 4300 with 4338A BDU and 4352A ADU covered by original manual 98-159912-C, dated 4 October 2018. The manual is manufacturer-authored and linked from distributor E-SAT. It is not verified as the latest revision. Confirm your installed hardware, software and current airtime service before applying this historical procedure.
Work through these checks
Identify the local port first
Read the port label: the manual assigns normal client traffic to LAN 2, 3 or 4, not the service port. Check the existing connection without making live wiring changes. Use the configured user-LAN address; the documented default is http://172.16.0.2. If the local page fails, give the port and client-address observations to the network administrator before blaming the satellite link.
Read the exact connection state
SIGNAL AVAILABLE means a candidate satellite signal is available; CONNECTED means registered and connected. On the antenna LED, flashing green and steady green represent those different states. DENIED is a registration refusal: preserve the displayed cause and ask the airtime provider to check the SIM against the requested service. Do not change antenna hardware for denial alone.
Capture events before changing the system
Tap the warning sign to read current BITE events. Record the full hexadecimal ID and symptom alongside Power, Terminal and Antenna LED patterns. A red Terminal indication can involve the BDU, ADU or modem; it does not identify a replacement part by itself. Once CONNECTED, have the operator inspect whether the intended data session is automatic or manually controlled rather than starting paid traffic blindly.
When to stop and get help
Stop for a red critical fault, overheating, damaged wiring or unsafe access. Do not approach the transmitting antenna, open units or attempt internal repairs. Give persistent denial to the airtime provider and hardware/event evidence to the authorized service partner.
What to tell support
Provide exact BDU/ADU labels, installed version, time, connection state, denial cause or BITE ID, three LED patterns, client port and local-page result. Share identifiers privately with the authorized partner. Keep configuration unchanged until the failed stage is understood.
Original troubleshooting guidance based on the official sources below. Menu names can change. This is an independent guide, not a manufacturer service bulletin or a bench-tested repair.