CGW-T/TS/D Installation and Programming Manual 3
Calls that are intended to be routed to the cellular network by the CGW-D, will be routed to
the PSTN network instead in the following cases:
A SIM card is not installed at all or not installed properly.
Cellular reception level is too low.
CGW-D device is in Registration mode.
CGW-D is not powered by the power supply.
NOTE
When the PSTN interface is plugged out, all calls shall be executed via a cellular
network, and a corresponding message will appear on the LCD display.
The Toll Restriction feature is implemented as follows:
CGW-T/TS devices use a black list of 10 restricted prefixes, which cannot be dialed.
CGW-D device uses a white list of 20 permitted prefixes, which are the only prefixes
that can be dialed via a cellular network.
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