2N VoiceBlue Lite - Manual v2.6 - Manual (Page 36)

3.3. Potential GSM Network Problems
The VoiceBlue Lite GSM gateway is designed for a continuous
100% load. The GSM network may cause the following problems:
• The GSM module(s) cannot log in, log in slowly or log out
occasionally. This might be caused by any of the events below:
• The signal intensity received from the GSM network is too
weak – the recommended minimum value is -80dBm. If
the signal is lower, change the antenna position or type.
• The GSM cell to which the GSM modules log in is
overloaded. Change the antenna position, or reduce the
number of GSM channels connected to the troubled GSM
network.
• One of the GSM modules keeps logged out or is unable to
process an outgoing call – this indicates a potential GSM
network overload on the installation site. To solve this
problem, set the parameter “Relax delay” = 2. If a GSM
module fails to log in or refuses to process a GSM call even
after the gateway restart, check your GSM network provider
for potential SIM card or GSM module blocking.
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