GSMK CRYPTOPHONE G10i, Руководство пользователя

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[Never ending key setup] Under certain circumstances, a similar signal-
ing issue at the GSM provider may also result in the “never ending key
setup” problem, especially when roaming on GSM networks that are
not properly configured. The phenomenon in this case is that the key
setup phase takes longer than 0 seconds and never comes to an end.
The underlying technical problem resides in the GSM network on which
you are roaming. Data calls are sometimes set up but then fail to trans-
port any data. To work around the problem if you are roaming, try
switching providers. If secure calling only works in one direction, you
can also use an unencrypted call to tell the other party to call you back
securely using his or her CryptoPhone. These problems are inherent to
using the CSD data call facility and apply to all encrypted telephony
over GSM. Under certain rare circumstances, a specific signalling con-
dition in the GSM network may lead to an unclear signalling state in
the CryptoPhone’s GSM engine, which may also cause the “never end-
ing key setup” problem or other undesired behavior. This situation can
usually be rectified by simply powercycling the CryptoPhone.
[Spotty Coverage] In some countries, GSM coverage is spotty at best
and does not offer country-wide coverage. For customers in Europe,
North Africa and Asia with GSM coverage problems, we recommend
our Thuraya T add-on solution that uses the Thuraya satellite system