Applies to: LT-4100 Certus 100; 95-102576 Rev 1.04, software 1.05R. Not LT-3100, LT-4100S or LT-4200.
Match your symptom
| What you see | What to do next |
|---|---|
| Identify the active path | Keep the installed firewall and routing policy. Coordinate changes with the authorized operator; do not start paid test traffic or reset the terminal. |
| Separate outgoing and incoming traffic | Keep the installed firewall and routing policy. Coordinate changes with the authorized operator; do not start paid test traffic or reset the terminal. |
| Compare usage evidence | Keep the installed firewall and routing policy. Coordinate changes with the authorized operator; do not start paid test traffic or reset the terminal. |
Work through these checks
Identify the active path
Check whether the client uses ordinary IP or PPPoE. Manual Start/Stop does not control PPPoE sessions.
What the result means: Keep the installed firewall and routing policy. Coordinate changes with the authorized operator; do not start paid test traffic or reset the terminal.
Separate outgoing and incoming traffic
Stopping outgoing IP does not stop a remote endpoint sending incoming data; that traffic can remain billable. Record the application involved.
What the result means: Keep the installed firewall and routing policy. Coordinate changes with the authorized operator; do not start paid test traffic or reset the terminal.
Compare usage evidence
Compare timestamps and provider records with Phone Usage. Its totals omit some retransmissions and are not a precise billing meter.
What the result means: Keep the installed firewall and routing policy. Coordinate changes with the authorized operator; do not start paid test traffic or reset the terminal.
When to stop and get help
Keep the installed firewall and routing policy. Coordinate changes with the authorized operator; do not start paid test traffic or reset the terminal.
What to tell support
LT-4100 Certus 100; 95-102576 Rev 1.04, software 1.05R. Not LT-3100, LT-4100S or LT-4200.
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.