# FXS Interface Configuration

The FXS Interface Configuration dialog box provides Foreign Exchange Station interface configuration information.

## Procedure

1. In the rear view, right-click the LEDs of FXS ports available in the CMM submodule.

2. Select FXS Interface Configuration from the Category list.

The following information appears:

> General

> Port Name (ifDescr)

> Type (ifType)

> Administrative Status (ifAdminStatus)

> Operational Status (ifOperStatus)

> Last Changed (ifLastChange)

> Description (ifAlias)

> 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)

General

### Port Name (ifDescr)

Presents 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

### Administrative Status (ifAdminStatus)

The intended interface state. Possible values are up, down, and testing. You cannot set the testing value.

### Operational Status (ifOperStatus)

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 (ifLastChange)

The value of sysUpTime,in hundredths of a second, when the interface entered its operational state. (The value is 0 if the state was entered before the last initialization of the management entity.)

### Description (ifAlias)

The name for the interface specified by a network manager. The name provides a non-volatile handler for the interface.

FXS

### Signal Type (cvaIfFXSCfgSignalType)

Indicates 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 - ring Frequency 25 Hertz

ringFrequency50 - ring Frequency 50 Hertz

ringFrequency20 - ring Frequency 20 Hertz

ringFrequency30 - ring Frequency 30 Hertz

### Hook Status (cvaIfFXSHookStatus)

The hook status of FXS interface.

Values are:

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

### Ring Active Status (cvaIfFXSRingActive)

This object contains the outgoing ring active indication.

If the object value is true, then the interface is currently generating Ring Out to the Key Telephone System (KTS) or plain old telephone service (POTS); otherwise, it is not generating Ring Out.

### Ring Ground Status (cvaIfFXSRingGround)

This object contains the incoming ring ground indication.

It is only valid when the cvaIfFXSCfgSignalType is fxsGroundStart. If the object is true, then the interface is presenting a Ring Ground to the connected equipment; otherwise, it is not presenting a Ring Ground.

### Tip Ground Status (cvaIfFXSTipGround)

This object contains the incoming ring tip indication.

It is only valid when the cvaIfFXSCfgSignalType is fxsGroundStart. If the object is true, then the interface is detecting a Tip Ground at the interface; otherwise, it is not detecting a Tip Ground.

### Connection Mode (cvIfCfgConnectionMode)

The object indicates the connection mode of the interface.

Values are:

Normal | The interface acts normally to handle incoming and outgoing calls.
Trunk | The interface acts in trunking mode. Trunking mode causes two interfaces (on either the same or different routers) to be always conferenced together, and for telephony signaling to be passed transparently through the VoIP system rather than trapped and interpreted by the session application on the router(s).
Plar | The interface acts in private line automatic ringdown (PLAR) mode. PLAR is handled by associating a peer directly with an interface such that when the interface goes off-hook, that peer is used to set up the second call leg and conference them together without the caller having to dial any digits.

Analog Information

### Status (cvaIfStatusInfoType)

Indicates the information transfer services for the current or last call.

Possible values are:

g3fax - Group 3 fax

voice - Analog voice.

None - No information transfer service.

This is available only for Analog Interfaces.

### Impedance (cvaIfCfgImpedance)

Indicates the terminating impedance of voice analog interfaces.

Values are:

Other | None of the above. 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)

Indicates 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.

This is available only for Analog Interfaces.

### Signal Errors (cvaIfStatusSignalErrors)

Indicates the accumulated number of signaling protocol errors that are detected in the interface since system startup.

This is available only for Analog Interfaces.