1、 TIA-664.504-B (Revision of TIA-664.504-A) October 2007Wireless Features Description: Call Forwarding- No Answer (CFNA) ANSI/TIA-664.504-B-2007 APPROVED: OCTOBER 9, 2007 REAFFIRMED: JANUARY 24, 2013 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through e
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19、12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 504-i Contents Wireless Features Description: Call ForwardingNo Answer Contents List of Tables.ii Revision Historyii 1 Call ForwardingNo Answer (CFNA)1 1
20、.1 Normal Procedures with Successful Outcome1 1.2 Exception Procedures or Unsuccessful Outcome .4 1.3 Alternative Procedures .5 1.4 Interactions with Other Wireless Services5 TIA-664.504-B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
21、41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 List of Tables 504-ii List of Tables Table 1: CFNA Subscription Options1 Revision History Revision Date Remarks IS-53, Revision 0 August 1991 Initial publication IS-53, Revision A May 1995 Updated publication ANSI/TIA/EIA-664, Revision 0 Ju
22、ne 1996 Initial ANSI publication ANSI/TIA/EIA/664-504-A July 2000 Updated ANSI publication TIA-664.504-B September 2007 Updated publication TIA-664.504-B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
23、 53 54 55 56 57 58 59 60 504-1 Call Forwarding No Answer (CFNA) 1 Call ForwardingNo Answer (CFNA) Call ForwardingNo Answer (CFNA) permits a called subscriber to have the system send incoming calls addressed to the called subscribers Directory Number to another Directory Number (forward-to number) or
24、 to the called subscribers designated voice mailbox, when the subscriber fails to answer, or is otherwise inaccessible (including no paging response, the subscribers location is not known, the subscriber is reported as inactive, Call Delivery is not active for a roaming subscriber, Do Not Disturb is
25、 active, etc.). CFNA does not apply when the subscriber is considered to be busy. CFNA does not impact a subscribers ability to originate calls. A subscriber may select a forward-to number termination address when the subscriber registers the CFNA. Applicability to Telecommunications Services CFNA i
26、s applicable to voice telecommunication services. 1.1 Normal Procedures with Successful Outcome Authorization CFNA may be generally available or may be provided after prearrangement with the service provider. The authorization may have the following subscription options: Table 1: CFNA Subscription O
27、ptions Subscription Options Values Registration Variable. The subscriber is authorized to specify his or her own forward-to number. Fixed. Forward-to number is registered upon authorization. Activation Demand. The subscriber is authorized to control the activation and deactivation of CFNA. Permanent
28、. CFNA is active while authorized. Deauthorization CFNA may be withdrawn at the subscribers request or for administrative reasons. Registration If the subscriber is authorized for Fixed Registration, the forward-to number shall be registered upon authorization. TIA-664.504-B 1 2 3 4 5 6 7 8 9 10 11
29、12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 Call Forwarding No Answer (CFNA) 504-2 The CFNA forward-to number may be registered by the service provider upon authorization for Variable Registration
30、subscribers. CFNA may be registered by a Variable Registration authorized subscriber specifying the CFNA registration feature code and a forward-to number termination address or voice message system Modifier Digit 8 (“V” on the keypad), as in: *FC + termination address + SEND , or *FC + 8 + SEND (Vo
31、ice 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 number or with a particular voice mailbox on a voice message system. Voice mail box passwor
32、ds are registered separately with the voice message system. Deregistration CFNA 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
33、 feature code. CFNA may be deregistered by a Variable Registration authorized subscriber specifying the CFNA deregistration feature code, as in: *FC0 + SEND . CFNA shall be deregistered upon deauthorization. Activation If the subscriber is authorized for Permanent Activation, CFNA shall be activated
34、 upon authorization. CFNA may be activated upon authorization or registration for Demand Activation authorized subscribers. CFNA may be activated upon registration for Variable Registration authorized subscribers. A previously registered CFNA forward-to number may be activated by a Demand Activation
35、 authorized subscriber specifying a CFNA activation feature code, as in: *FC + SEND . 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 number shortly after this feature is activated
36、permitting the subscriber to verify the validity of the forward-to number. TIA-664.504-B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 504-3 Call Forwarding No Answer (CFNA) D
37、eactivation CFNA may be deactivated by a Demand Activation authorized subscriber specifying the CFNA deactivation feature code, as in: *FC0 + SEND . If the deactivation is accepted, the system shall indicate success with feature confirmation treatment. CFNA shall be deactivated upon deauthorization
38、or deregistration. Invocation The feature treatment is invoked when there is an incoming call that is not answered or cannot be answered (for any reason) and CFNA is active. Reasons for forwarding a call with CFNA include: a. Do Not Disturb active, etc. b. MS location is not known. c. MS reported in
39、active. d. Roaming with Call Delivery deactive. e. No MS response to a page request. f. No MS or subscriber response to alerting. g. No subscriber response to Call Waiting notification. Normal Operation with Successful Outcome When CFNA is active, incoming calls for the subscriber shall be forwarded
40、 to the forward-to number when the subscriber is inaccessible. Call Detail Record The system should record call detail information for the following: a. CFNA registration activities and events. b. CFNA deregistration activities and events. c. CFNA activation activities and events. d. CFNA deactivati
41、on activities and events. e. CFNA invocation events. f. Forward-to call leg usage. See DMH for the specific information to be included for each element. TIA-664.504-B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 4
42、8 49 50 51 52 53 54 55 56 57 58 59 60 Call Forwarding No Answer (CFNA) 504-4 1.2 Exception Procedures or Unsuccessful Outcome Registration If the subscriber is not authorized for the request, or if the forward-to number is not acceptable, the system shall apply feature denial treatment when registra
43、tion is attempted. The system should not accept forward-to numbers to the operator (0- or 0+), service codes (N11), police, fire or similar agencies, or a revertive call. Deregistration If the subscriber is not authorized for the request, the system shall apply feature denial treatment when deregist
44、ration is attempted. Activation If the subscriber is not authorized for the request, or if a forward-to number is not properly registered, the system shall apply feature denial treatment when activation is attempted. If the courtesy call to the forward-to number cannot be routed, then the call shoul
45、d be given the appropriate treatment, such as applying the Special Information Tone for intercept to the registering subscriber. Since the validity of the forward-to number is in doubt, CFNA may be deregistered and deactivated. Courtesy calls need not be answered to verify the validity of the forwar
46、d-to number. 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, s
47、uch as applying the Special Information Tone for intercept to the calling party. Precautions should be taken to preclude undesirable looping of forwarded numbers within the MSC or between the MSC and other switching centers. If such looping is detected, the call forwarding should be given the approp
48、riate treatment, such as applying the Special Information Tone for intercept to the calling party. Exceptions While Roaming None identified. TIA-664.504-B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 5
49、2 53 54 55 56 57 58 59 60 504-5 Call Forwarding No Answer (CFNA) Exceptions During Intersystem Handoff None identified. 1.3 Alternative Procedures None identified. 1.4 Interactions with Other Wireless Services Asynchronous Data Service (ADS) *FC may not be supported (Fixed Registration and Permanent Activation option is supported). Different CFNA treatment may be applied for ADS calls. Call Delivery (CD) CD affects CFNA. That is, if CD is inactive while the subscriber is roaming, the subscriber is considered to be inaccessible. If the subscriber has CFNA active, incomi
