# FXS Interface Configuration

The FXS Interface Configuration dialog box provides general information about the interface configuration, FXS specific configuration information, and analog configuration for the FXS interface.

## Navigation

Do one of the following:

> Right-click on the FXS port, then select Configuration > FXS Interface Configuration from the popup menu.

> Right-click on an 8FXS or 16FXS port, then select Configure from the popup menu. The VoicePort List dialog box appears. Click Details. Select FXS Interface Configuration from the Category list.

The following information appears:

> FXS

> Signal Type (cvaIfFXSCfgSignalType)

> Ring Frequency (cvaIfFXSRingFrequency)

> Hook Status (cvaIfFXSHookStatus)

> Ring Active Status (cvaIfFXSRingActive)

> Ring Ground Status (cvaIfFXSRingGround)

> Tip Ground Status (cvaIfFXSTipGround)

> Connection Mode (cvIfCfgConnectionMode)

> Analog Information

> Status (cvaIfStatusInfoType)

> Impedance (cvaIfCfgImpedance)

> Maintanance Mode (cvaIfMaintenanceMode)

> Signal Errors (cvaIfStatusSignalErrors)

> Integrated DSP (cvaIfCfgIntegratedDSP)

## Related Topics

FXS Voice Configuration

### Index (ifIndex)

The unique identifier for the interface.

### Description (ifDescr)

The interface information (for example, the product name, manufacturer, and hardware version).

### Type (ifType)

The network interface type defined in the MIB-II interface table.

For switch port ifType is ethernetcsmacd

### Admin Status (ifAdminStatus)

The administrative status of the interface.

Values are:

> up

> down

### Operational Status (ifOperStatus)

The current operating state of the interface.

Values are:

The current operating state of the interface.

Values are:

up (1) | The ifAdminStatus is up.
down (2) | The ifAdminStatus is down.
testing (3) | No operational packets can be passed. You cannot set this value through SNMP.
Unknown (4) |
Dormant (5) | The interface is waiting for external actions.

### Last Change Time (ifLastChange)

The time at which the interface changed its state.

### Signal Type (cvaIfFXSCfgSignalType)

The signaling type of the FXS interface is either loop start or ground start.

### Ring Frequency (cvaIfFXSRingFrequency)

The ring frequency to be used in the FXS interface. The default value of this object is 25 Hertz (Hz).

Values are:

ringFrequency25 | 25 Hertz
ringFrequency50 | 50 Hertz
ringFrequency20 | 20 Hertz
ringFrequency30 | 30 Hertz

### Hook Status (cvaIfFXSHookStatus)

The hook status of FXS interface.

Values are:

onHook | The connected equipment (for example, a phone) is on hook.
offHook | The connected equipment is off hook.

### Ring Active Status (cvaIfFXSRingActive)

The outgoing ring active indication.

Values are:

true | The interface is generating a ring out signal to the KTS or POTS.
false | The interface is not generating ring-out signal

### Ring Ground Status (cvaIfFXSRingGround)

The incoming ring ground indication.

Tip ground status is valid only when the cvaIfFXSCfgSignalType is fxsGroundStart.

Values are:

true | The interface is presenting a ring ground to the connected equipment.
false | The interface is not presenting a ring ground to the connected equipment.

### Tip Ground Status (cvaIfFXSTipGround)

The incoming tip ground indication.

Tip ground status is valid only valid when the cvaIfFXSCfgSignalType is fxsGroundStart.

Values are:

true | The interface is presenting a tip ground to the connected equipment.
false | The interface is not presenting a tip ground to the connected equipment.

### Connection Mode (cvIfCfgConnectionMode)

The object indicates the connection mode of the interface.

Values are:

### Status (cvaIfStatusInfoType)

The information transfer services for the current or last call.

Values are:

g3fax | Group 3 fax.
voice | Analog voice.
None | No service.

### Impedance (cvaIfCfgImpedance)

The terminating impedance of voice analog interfaces.

Values are:

Other | None of the values listed here. Arbitrary, within limits for special cases.
Ohms600Real | 600 ohms.
Ohms600Complex | 600 ohms + 2.16uF.
Ohms900Complex | 900 ohms + 2.16uF.
OhmsComplex 1 | complex 1; 220 Ohms + 820 Ohms || 115nF. Used primarily in Germany.
OhmsComplex 2 | complex2; 270 Ohms + 750 Ohms || 150nF. Used primarily in the United Kingdom and Sweden. This is available only for analog interfaces.

### Maintanance Mode (cvaIfMaintenanceMode)

The maintenance mode of the analog voice interface.

Values are:

Host Compressed Loopback | Set by the managed system to perform the compressed voice loopback test. The voice packet is passed by voice application to the interface associated codec. Instead of feeding these into the codec for decompression, they are immediately sent back to the voice application as if they had originated locally and had been compressed.
Host Uncompressed Loopback | Set by the managed system to perform the uncompressed voice loopback test. The voice packet is sent by voice application all the way through the interface associated codec and then turned around instead of being sent to the telephony endpoint.
Interface Compressed Loopback | Set by the managed system to perform the interface uncompressed voice loopback test for the external test equipment that is connected to the voice interface. The voice samples are sent from the test equipment all the way through the interface associated codec and then turned around instead of being sent to the voice application.
Interface Uncompressed Loopback | Set by the managed system to perform the interface uncompressed voice loopback test for the external test equipment that is connected to the voice interface. The voice samples are sent from the test equipment to the interface associated codec. Instead of feeding the voice samples into the codec for compression, they are immediately sent back to the telephony interface.
None | Interface is not in maintenance mode.

### Signal Errors (cvaIfStatusSignalErrors)

The accumulated number of signaling protocol errors that were detected in the interface since system startup.

### Integrated DSP (cvaIfCfgIntegratedDSP)

Indicates whether the interface has an integrated digital signal processing (DSP) unit.