2N BRI Lite/Enterprise v1.1 - Manual (Page 22)

Before You Start 2.1
22
Potential GSM/UMTS Troubles
All 2N GSM gateways work reliably under a long-time full load. The following problems
may be caused by GSM/UMTS networks:

The GSM/UMTS module(s) cannot log in, log in slowly, or log out occasionally.
This problem may be caused by any of the following situations:
 The GSM/UMTS signal is low. The minimum signal level should be
approximately -80dBm. If lower, change the antenna position or type!
 The GSM/UMTS cell (BTS) to which the GSM/UMTS modules are trying to
log in is overloaded. Change the antenna position or reduce the count of
the logged-in GSM/UMTS modules.

One of the GSM/UMTS modules is permanently logged-out or fails to make
outgoing calls:
 The problem indicates a GSM/UMTS network overload on the installation
site. To eliminate the problem, set the Relax delay parameter to 2
seconds. If the GSM module fails to log in or rejects to make outgoing
GSM calls even after the gateway restart, consult your GSM provider for
your SIM card/GSM module availability.
The manufacturer shall not be held liable for any SIM card or provider service
unavailability in the case of a breach of the provider‟s SIM terms and conditions for
the SIM card use.
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