VoIP Supplementary Services Descriptions: Call Forwarding-Unconditional

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3GPP2 S.R0125-505-0 Version 1.0

Version Date: April 2008

VoIP Supplementary Services

Descriptions:

Call Forwarding-Unconditional

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Revision

Date

Rev. 0 v1.0

Initial Publication

April 2008

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VoIP Supplementary Services Descriptions:

Call Forwarding-Unconditional

List of Tables

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505-1 Call Forwarding–Unconditional (CFU)

1 Call Forwarding–Unconditional (CFU)

Call Forwarding–Unconditional (CFU) permits a called subscriber to send incoming calls addressed to the called subscriber’s public identity to another public identity (forward-to identity) or to the called subscriber’s designated voice mailbox. If this feature is active, calls are forwarded regardless of the condition of the termination.

CFU does not impact a subscriber’s ability to originate calls.

A subscriber may select a forward-to termination address when it registers the CFU.

1.1 Normal Procedures with Successful Outcome

Authorization

CFU may be generally available or may be provided after prearrangement with the service provider. The authorization may have the following subscription options:

Table 1: CFU Subscription Options Subscription Options Values

Registration Variable. The subscriber is authorized to specify his or her own forward-to identity. Fixed. Forward-to identity is registered upon authorization.

Activation Demand. The subscriber is authorized to control the activation and deactivation of CFU.

Permanent. CFU is active while authorized.

Deauthorization

CFU may be withdrawn at the subscriber’s request or for administrative reasons.

Registration

If the subscriber is authorized for Fixed Registration, the forward-to identity shall be registered upon authorization.

The CFU forward-to identity may be registered by the service provider upon authorization for Variable Registration subscribers.

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Call Forwarding–Unconditional (CFU) 505-2

CFU may be registered by a Variable Registration authorized subscriber specifying the CFU registration feature code and a forward-to termination address or voice message system Modifier Digit 8 (“V” on the keypad), as in:

*FC + termination address, or *FC + 8 (Voice message system).

If the registration is accepted, the system shall indicate success with feature confirmation treatment.

Registration associates the subscriber with the termination address as a forward-to identity or with a particular voice mailbox on a voice message system. Voice mailbox passwords are registered separately with the voice message system.

Deregistration

CFU may be deregistered upon deactivation (at the home service provider option).

If the deregistration is to be separate from deactivation, the deregistration feature code must be distinct from the corresponding deactivation feature code.

CFU may be deregistered by a Variable Registration authorized subscriber specifying the CFU deregistration feature code, as in:

*FC0.

CFU shall be deregistered upon deauthorization.

Activation

If the subscriber is authorized for Permanent Activation, CFU shall be activated upon authorization.

CFU may be activated upon authorization or registration for Demand Activation authorized subscribers. CFU may be activated upon registration for Variable Registration authorized subscribers.

A previously registered CFU forward-to identity may be activated by a Demand Activation authorized subscriber specifying a CFU activation feature code, as in:

*FC.

If the activation is accepted, the system shall indicate success with feature confirmation treatment.

The serving system may provide a courtesy call to the forward-to identity shortly after this feature is activated permitting the subscriber to verify the validity of the forward-to identity.

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Deactivation

CFU may be deactivated by a Demand Activation authorized subscriber specifying the CFU deactivation feature code, as in:

*FC0.

If the deactivation is accepted, the system shall indicate success with feature confirmation treatment.

CFU shall be deactivated upon deauthorization or deregistration.

Invocation

The feature treatment is invoked when there is an incoming call and CFU is active.

Normal Operation with Successful Outcome

When CFU is active, incoming calls for the subscriber shall be forwarded to the forward-to identity without being offered forward-to the served subscriber.

If the subscriber’s location is known and the subscriber is idle, the MS may be commanded to provide an abbreviated (or reminder) alert to indicate that CFU has been invoked to forward a call.

Accounting Record

The system should record accounting information for the following: a. CFU registration activities and events.

b. CFU deregistration activities and events. c. CFU activation activities and events. d. CFU deactivation activities and events. e. CFU invocation events.

f. Forward-to call duration.

1.2 Exception Procedures or Unsuccessful Outcome

Registration

If the subscriber is not authorized for the request, or if the forward-to identity is not acceptable or authorized, the system shall apply feature denial treatment when registration is attempted.

The system should not accept forward-to identities to the operator (0- or 0+), service codes (N11), police, fire or similar agencies.

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Deregistration

If the subscriber is not authorized for the request, the system shall apply feature denial treatment when deregistration is attempted.

Activation

If the subscriber is not authorized for the request, or if a forward-to identity is not properly registered, the system shall apply feature denial treatment when activation is attempted.

If the courtesy call to the forward-to identity cannot be routed, then the call should be given the appropriate treatment. Since the validity of the forward-to identity is in doubt, CFU may be deregistered and deactivated. Courtesy calls need not be answered to verify the validity of the forward-to identity.

Deactivation

If the subscriber is not authorized for the request, the system shall apply feature denial treatment when deactivation is attempted.

Invocation

If the forwarded call cannot be routed to the forwarded-to destination, then the call should be given the appropriate treatment.

Precautions should be taken to preclude undesirable looping of forwarded identities within the ASs. If such looping is detected, the call forwarding should be given the appropriate treatment.

1.3 Alternative

Procedures

None identified.

1.4 Interactions with Other Wireless Services

No interactions have been identified with the following exceptions:

Call Forwarding–Busy (CFB)

CFU takes precedence over CFB. That is, calls arriving when CFU is active shall be forwarded unconditionally and not given CFB treatment.

Call Forwarding–Default (CFD)

CFU takes precedence over CFD. That is, calls arriving when CFU is active shall be forwarded unconditionally and not given CFD treatment.

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Call Forwarding–No Answer (CFNA)

CFU takes precedence over CFNA. That is, an incoming call arriving for a subscriber with both CFU and CFNA active shall be forwarded with CFU.

Call Waiting (CW)

CFU takes precedence over CW. That is, calls arriving when CFU is active shall be forwarded unconditionally and not given CW treatment.

Calling Identification Presentation (CIP)

If the called subscriber has CIP active, the calling identity may be presented to the called subscriber during call forwarding indication according to CIP’s procedures.

If the forwarded-to user has CIP active and the original calling party does not have CIR active, the original calling identity shall be presented to the forwarded-to user. If the forwarded-to user has CIP active and the forwarding party does not have CIR active, the forwarding party identity may be presented to the forwarded-to user.

Calling Identification Restriction (CIR)

If the calling identity indicates presentation restricted, the calling identity shall not be presented to the called party or the forward-to party.

If the called (redirecting) subscriber has CFU invoked and either the CIR mode is Permanently Restricted or the CIR Default is Presentation Restricted, the redirecting identity shall indicate presentation restricted to prevent presentation to the forward-to party.

Customized Ring-Back Tone (CRBT)

Before the call is forwarded, the calling party shall be presented with the original called party’s CRBT if available.

When the call is forwarded, the called party’s network shall continue to present the called party’s CRBT to the calling party until a signaling indication is received from the forwarded-to party’s network regarding the availability of media.

If the forwarded-to party has CRBT based on calling party’s identity, then the CRBT should be played based on the original calling party’s identity.

Flexible Alerting (FA)

Interaction between FA and CFU is beyond the scope of this Standard. The following describes a possible implementation:

CFU takes precedence over FA. CFU of the FA Pilot identity shall apply to calls to the Pilot identity when CFU is active.

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CFU for the FA pilot identity takes precedence over CFU of the individual FA members. That is, if both the FA pilot identity and an FA member have CFU active, CFU treatment is determined by the FA pilot identity.

Inbound Call Restriction (ICR) / Anonymous Call Rejection (ACR)

Interaction between ICR/ACR and CFU is beyond the scope of this Standard. The following describes a possible implementation:

CFU takes precedence over ICR/ACR. If an incoming call arrives for a subscriber with ICR/ACR and CFU active, incoming calls are redirected by CFU.

Outbound Call Restrictions (OCR)

Registering a call forwarding identity to an identity blocked by the OCR service should be precluded. If the forwarding user’s call to the forwarded-to user is restricted by OCR, then the attempt to forward the call to the forwarded-to user shall be rejected.

Terminating Identification Presentation (TIP)

If the calling subscriber has TIP active, the forwarded-to identity should be presented to the calling subscriber according to TIP procedures. If the original called party does not have TIR active, the original called identity may also be presented to the calling subscriber.

Terminating Identification Restriction (TIR)

If the forwarded-to subscriber has TIR active, the forwarded-to identity shall not be presented to the calling subscriber. If the original called party has TIR active, the original called identity shall not be presented to the calling subscriber.