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5.5. Routing of Incoming GSM Calls
Incoming calls from the GSM network are subject to the algorithm described in
Fig. 19 and the following steps:
Incoming calls are processed according to the
Mode
parameter
in the
GSM incoming calls
chart. The following options are available:
Reject incoming calls –
all incoming calls are rejected.
Ignore incoming calls
– incoming calls are not routed
to extensions. The call request is either rejected or ignored
(the calling party hears the ringing tone) on the GSM network
side.
Report to PC
– the information on an incoming call is sent to a
PC equipped with the management software. The calling
subscriber gets a voice message or check ringing tone.
The management software then completes the call routing
procedure.
3
CallBack
– this function helps establish connection on the
account of the SIM card inserted in the GSM gateway.
The incoming call is either ignored or rejected. After the
calling subscriber hangs up, the GSM gateway establishes
connection to the defined extension. When the extension
answers, the GSM gateway replays the CallBack message
to the extension while establishing a connection to the
previously calling subscriber in the GSM network. After the
CallBack message, the GSM gateway interconnects the call.
If neither of the above-mentioned options is selected, the
AutoCLIP routing table is checked. If the calling number
is found, the call is routed to the extension whose number
is assigned to the calling number in the table.
3
not available yet.
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