Forward All Voice Calls

With this option checked, the incoming calls are immediately forwarded to another number/URL.

Forward number or URL

Type in the number/URL to which the incoming call should be forwarded.

Forward No Answer

With this option checked, the incoming calls are forwarded to another number/URL if you do not answer the call and No Answer Ring Duration timer expires.

Forward number or URL

Type in the number/URL to which the incoming call should be forwarded.

No Answer Ring Duration ... seconds

The period (in seconds), after which an incoming call should be forwarded to a chosen number/URL. The value could range from 5 to 60 seconds.

Forward Busy

With this option checked, the incoming calls are forwarded to another number/URL when all 3 lines are busy. This type of forwarding is also applied if you click Hang up button during an incoming call.

Forward number or URL

Type in the number/URL to which the incoming call should be forwarded.

Use Hairpin Call Forwarding (2 call legs)

With this option unchecked, the standard mechanism for call forwarding is used (this is recommended).  When a call is forwarded, the message (302 Moved Temporarily in the case of SIP) is sent back to the calling party requesting that the caller reoriginate a follow-on call to the forwarded-to destination.

With this option checked, the internal mechanism is used. A second independent VOIP call leg is created for the forwarded call leg. This leg is bridged to the original incoming VoIP call leg. This method has the advantage that it has no end-to-end dependency on the capabilities of the VOIP endpoints.

Use Hairpin Call Transfer (transfer-by-jone mode, 2 call legs)

With this option unchecked, the standard mechanism for call transfer is used (this is recommended). When a call transfer occurs, a control message (REFER in the case of SIP) is sent back to the other party to request that the other party initiates a follow-on call from the other party to the final transfer-to destination. The original call is usually not torn down until the "replaces" operation is completed successfully. The term replaces is used here in the context of "Call 2 replaces call 1”. If for any reason the replacement operation fails, the other party usually does not disconnect the call to the transferor. In some cases, the call replacement mechanism is not fully supported and only blind call transfer is possible. The standard transfer method results in an optimal direct call path between the transferee and the transfer-to party after the call transfer is committed.

With this option checked, the internal mechanism is used. In this case, the original transferee-to-transferor VOIP call leg is kept, and a second transferor to transfer-to VoIP call leg is created for the consultation call phase of the transfer. When the transfer is committed, the original and consultation call legs are simply bridged together. This method has the advantage that it has no end-to-end dependency on the capabilities of the transferee or transfer-to VOIP endpoint.

Play music when transfer call

Check this option so that the transferee listens to music while waiting on the phone. This option can only be used with Hairpin Call Transfer. With this option unchecked, the transferee listens to standard dialing tone while waiting.

File Path

Audio file to be played when the call is transfered. You can browse to a preferred audio file or enter the file path. The file must be an 8 kHz 16-bit Mono or 8 kHz 8-bit Mono wave file (.wav). Examples of such files can be found in the *{CommonAppDataFolder}\FaxVoip Softphone\Sounds\MON folder after the installation of the Fax Voip Softphone. By default the music_2.wav file is used.

*{CommonAppDataFolder} - the system file directory containing application data for all users. The name of this folder is usually C:\ProgramData.

Notes

• When using the standard mechanism for Call Forwarding or Call Transfer, URL or phone number can be entered in the Forward number or URL fields (or in the Phone to Dial field of the main application window). The real Forward URL is formed by the following rules: (1) If the ip-address is specified, the call is forwarded to the specified ip-address. If the ip-address not specified, the call is forwarded to ip-address of the other party of the original call. (2) Prefix in the URL (sip: or h323:) is ignored. The incoming SIP call can not be forwarded to H.323 address and vice versa. The table below illustrates this:

• When using Hairpin Call Forwarding or Hairpin Call Transfer (2 call legs), both IP-address and prefix are ignored. You only need to specify phone number to forward (or transfer) the call. In this case the second independent VOIP call leg (forwarded/transferred call leg) is created based on Outgoing VOIP Call Routing rules – the same rules that you use for standard outgouing calls.
• The standard mechanisms for Call Forwarding (302 Moved Temporarily, H.450.3) and Call Transfer (SIP REFER, H.450.2) are usually supported by VOIP PBX in local network. Nevertheless, these mechanisms are usually blocked in public VOIP networks. We recommend to use standard mechanisms where possible.
• The Hairpin Call Forwarding and Hairpin Call Transfer (2 call legs) have no dependency on the capabilities of your VOIP network. Using these options you even can transfer/forward SIP calls to H.323 and vice versa.
• We do not guarantee successful fax transmission (especially T.38) via hairpin (2 call legs) connection. This method can be used with voice calls only.
• Call Forwarding options (Forward All Voice Calls, Forward No Answer, Forward Busy) are not applied to incoming fax calls. See in the Incoming VOIP Call Routing chapter of this user manual.  See also in the Incoming VOIP Call Routing Settings, General Settings chapter, Fax Call option.
• The established call can not be transferred when the fax is transmitted.