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3.2. Telephone Line Tones
3.2.1. Status Tones
The GSM gateway sends tones to the telephone line to indicate the line status. The
tone frequency is 425 Hz in initial setting. Frequency is programmable; it is possible to set
up double frequency tones.
Dial tone:
Continuous tone, or
(morse A) according to setting
·
SmartGate is ready to receive dialing.
Ringing tone:
·
The called subscriber's telephone is ringing.
·
The GSM network or connected PBX transmits this tone.
Busy tone:
, programmable cadency
·
In case of call routing to GSM network SmartGate generate busy tone in any of
the following cases:
§
The SIM card has not been installed.
§
SmartGate is not registered to GSM network.
§
SmartGate is registered into a foreign network but roaming is disabled.
§
The called subscriber line is busy.
§
The called subscriber hangs up (disconnection).
§
The called number has too many digits (more than 30).
§
The called number is barred.
·
In case of call routing to SmartGate’s FXO interface SmartGate generate busy
tone in any of the following cases:
§
Line is not connected. There is no current on the line.
§
The called number has too many digits (more than 30).
§
The called number is barred.
§
If the called subscriber line is busy or called subscriber hangs up, busy tone
is generated by PBX.
Dialing end signaling:
·
Dialing reception has been terminated. Connection is being established.
PIN tone:
·
Enter the PIN code.
·
This tone is transmitted upon power up if the PIN has to be entered manually.
PUK tone:
·
Enter the PUK code.
·
This tone is transmitted upon repeated wrong PIN entering attempts. SIM card is
blocked.
Summary of Contents for 2N
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