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InnoMedia MTA8328-1 Administrative Guide
depends upon loop length and the number
of ringers attached to the line.
Ring Frequency
The telephone company sends a ringing
signal which is an AC waveform.
The frequency used in the United States is
20 HZ and in Europe is typically 25 Hz.
Ring Type
The shape of the ringing signal waveform.
CID Type
This parameter defines how CID / CLI signals
are generated. Please note that only FSK
based CID signals are supported. If your
analog phone only supports DTMF CID, it will
not be able to display the CID of the caller.
4.3.3
Tone Cadence Setting
Configures the ring cadence (the timing of ringing to pause; it varies from country to country) for an FXS
port.
The normal ring cadence in North America is 2 seconds of ringing followed by 4 seconds of silence.
The United Kingdom uses a double ring of 0.4 seconds separated by 0.2 seconds of silence, followed by 2
seconds of silence.
When shipped from the factory, the MTA has set the tone cadence to match the country requirements.
You can manually set the tone cadence if you wish to override the default country values.
Figure 30.
Tone Cadence Setting
