FXO and FXS Parameters

'Update Port Info'

configure voip > interface fxs-fxo > port-info

[AnalogPortInfo_x]

Defines a descriptive name for an analog port. This can be used to easily identify the port.

The valid value is a string of up to 40 characters. By default, the value is undefined.

Note:

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For the ini file parameter, the x denotes the port number.

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To configure a port description through the Web interface, see Configuring Name for Telephony Ports.

'FXS Coefficient Type'

configure voip > interface fxs-fxo > fxs-country-coefficients

[FXSCountryCoefficients]

Determines the FXS line characteristics (AC and DC) according to USA or Europe (TBR21) standards.

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[66] Europe = TBR21

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[70] USA = (Default) United States

Note: For the parameter to take effect, a device restart is required.

[EnhancedFXSLineCurrent]

Defines the FXS off-hook current, which is the current that the device supplies to the analog line when it is in off-hook state.

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[0] = (Default) 25 mA

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[1] = 35 mA

Note:

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You can only apply an off-hook current of 35 mA to the first and last ports of each FXS connector (i.e., FXS ports 1 and 24, FXS ports 25 and 48, and FXS ports 49 and 72). All the other FXS ports have a fixed current of 25 mA.

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If you want to configure all the first and last ports of all the FXS connectors with an off-hook current of 35 mA, configure the parameter globally:

EnhancedFXSLineCurrent = 1

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If you want to configure only specific FXS ports (first and/or last) with an off-hook current of 35 mA, the first port of the first FXS connector of FXS Blade 1 (Slot 1 - S1) is denoted as "0" and the last port as "23". For the first port of the next FXS connector, simply increment the previous last port by 1 (i.e., "24") and add 23 to it for the last port (i.e., "47"), and so on.

For example:

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For the FXS connector labeled FXS 1-24 on FXS Blade 1 (in Slot 1), use "0" to denote the first port and "23" the last port.

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For the FXS connector labeled with FXS 25-48 on FXS Blade 1 (in Slot 1), use "24" to denote the first port and "47" the last port.

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For the FXS connector labeled with FXS 49-72 on FXS Blade 1 (in Slot 1), use "48" to denote the first port and "71" the last port.

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For the FXS connector labeled FXS 1-24 on FXS Blade 2 (in Slot 2), use "72" to denote the first port and "95" the last port.

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and so on.

EnhancedFXSLineCurrent_0 = 1 ; Port 1 on FXS Blade 1

EnhancedFXSLineCurrent_23= 1 ; Port 24 on FXS Blade 1

EnhancedFXSLineCurrent_24 = 1 ; Port 25 on FXS Blade 1

EnhancedFXSLineCurrent_47 = 1 ; Port 48 on FXS Blade 1

EnhancedFXSLineCurrent_48 = 1 ; Port 49 on FXS Blade 1

EnhancedFXSLineCurrent_71 = 1 ; Port 72 on FXS Blade 1

EnhancedFXSLineCurrent_72 = 1 ; Port 1 on FXS Blade 2

EnhancedFXSLineCurrent_95 = 1 ; Port 24 on FXS Blade 2

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For the parameter to take effect, a device restart is required.

[EnableTrapezoidRing]

Some old phones might require higher ringing voltage to operate correctly. In this case, configure the [EnableTrapezoidRing] accordingly. The device generates a 75Vrms sinusoidal voltage instead of 54Vrms.

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[0] = (Default) Disable. A 54Vrms sinusoidal ringing voltage is generated.

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[1] = Enable. A 75Vrms sinusoidal ringing voltage is generated.

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Note:

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You can configure this parameter to [1] for no more than six ports per FXS connector segment.

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For the parameter to take effect, a device restart is required.

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A segment is a group of 12 FXS ports. Each D-Sub (or Telco) connector includes two segments: 1-12 and 13-24. Each segment can support up to six concurrent high voltage (HI-V) ringing ports. The extra calls (on the 7th, 8th,… ports) will be rejected with a 503 (Service Unavailable) SIP response and a PSTN release cause code 43 (Access information discarded).

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For trapezoid ringing, if you have also enabled emergency calling on a port segment, the segment is limited to five waveform ringing.

[EnablePulseDialDetection]

Enables the device to detect pulse (rotary) dialing from analog equipment (e.g., telephones) connected to the device's FXS port interfaces.

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[0] = Disable (default)

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[1] = Enable

Note: For the parameter to take effect, a device restart is required.