Applies to: Nera WorldPhone · TPU · Portable / Provident / Marine / Voyager · ©2000
Work through these checks
01 · TPU
Identify the existing Telephone Unit (TPU), antenna configuration and power-supply arrangement. Marine/Voyager have a separate supply to distinguish from the TPU; do not transfer Portable/Provident assumptions. Record the exact existing message, including Not available or Subscriber busy. A busy called party, uncommissioned service and an unsuccessful satellite search are different findings. Do not move the antenna, change cables or make test calls.
02 · PIN / PUK / FAX / DATA
Phone PIN and the SIM’s PUK are different controls; do not guess codes or reset ownership credentials. Record existing FAX/data-port assignments and the PC/TPU serial rate privately from available records. Local port or rate mismatch differs from network commissioning. Do not reconfigure ports, adjust oscillator compensation, reset or update firmware to test this legacy equipment.
When to stop and get help
Do not continue these checks in unsafe conditions. For immediate danger, use local emergency services and the device’s emergency instructions. Otherwise, contact your provider or a qualified technician.
What to tell support
Write down your exact model, service provider and on-screen message. Photograph the existing connections for your own reference before changing anything. Nera WorldPhone · TPU · Portable / Provident / Marine / Voyager · ©2000
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.