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Important recommendations
1. Select a reliable telephone line or SIM card for connection whose number will not be
changed in the future (will not be renumbered).
2. You are recommended to use another GSM gateway or a GSM modem rather than a fixed
line modem to establish connection much more quickly.
3. If data GSM gateway will be used for supervision, it should be equipped with a SIM card with
a separate number for data connections (necessary if you use remote supervision with
callback to a GSM gateway of different operator).
4. A connection within one GSM network is more reliable than a connection between different operators.
5. If you are forced to use two different operators for remote supervision, read the chapter
5.4.10 -
Data Connection Problems
.
5.4.5. What Is "Callback"
In case of normal supervision call, the calling party covers data transmission costs. The callback
is a way, how to pay for supervision connection on account of supervised GSM gateway.
1. The PC equipped with data GSM gateway or modem “calls” the GSM gateway to be
programmed.
2. The called GSM gateway identifies the CLIP of calling PC as a callback request and rejects
the incoming call immediately. Therefore, this request is free.
3. Right after that, the called GSM gateway calls this number, which sent the request. If
unsuccessful, it retries several times later.
4. The PC waits for this callback. Having received it, it establishes data connection. Remote
supervision is possible upon entering of the valid service password.
5.4.6. Remote Supervision from 2N Supervision Center
You need not configure anything for this service; all you have to do is to set parameter
930 to enable remote supervision. Necessary parameters are hidden (cannot be
programmed). Callback is always used for this connection.
5.4.7. Overview of Remote Supervision Parameters
One common parameter enables / disables remote supervision, and four sets of
parameters follows:
•
CLIP - number of remote supervision center,
•
callback enabled / disabled,
•
number for callback.
These parameters enables to make remote supervision call from up to four different sites.
Parameters are described in details in chapter 6.6 -
Service parameters
.
ATTENTION! For the first time, these parameters must be programmed by phone!
(First one, CLIP, is enough, if callback is not requested.)
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Страница 24: ...22 4 2 Description of GSM Gateway PCB Fig 7 Printed Circuit Board PCB of dual band GSM Gateway model 501101E ...
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Страница 57: ... 2002 2N TELEKOMUNIKACE a s Prague DR 972 v 1 33 ...