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My device disconnects randomly and frequently, despite stable data sessions

Update device configuration to ensure more stable connectivity.

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Written by Laurent Wijgergangs
Updated over a month ago

Environment

  • Device: Queclink GL320MG

  • Cellular technologies:

    • LTE-M

    • NB-IoT

    • 2G

  • Device configuration settings: LTE-M (no fallback)

  • Onomondo app:

    • Signaling Logs

    • Traffic Monitor

Issue

  • Device sends data but then disconnects unexpectedly and often.

  • In Traffic Monitor, frequent transactions are visible, followed by a sudden stop.

  • In Signaling Logs, the device re-registers after disconnecting, but does not remain registered between data sessions.

Solution

Update device configuration to ensure more stable connectivity:

  1. Enable automatic fallback to available radio access technologies (2G, NB-IoT) in addition to LTE-M.

  2. Extend data session timeout to approximately five minutes to allow heartbeats to reuse an active session.

Consult your AT command manual for specific instructions.

Cause

The device is currently restricted to LTE-M and closes data sessions too quickly. Without fallback options and a longer session duration, the device must re-register frequently, causing instability and data interruptions - especially in areas with marginal LTE-M coverage.

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