1、 TIA-664.506-B (Revision of TIA-664.506-A) October 2007Wireless Features Description: Call Transfer (CT) ANSI/TIA-664.506-B-2007 APPROVED: OCTOBER 12, 2007 REAFFIRMED: JANUARY 24, 2013 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating mis
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19、 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 60 506-i Contents Wireless Features Description: Call Transfer Contents List of Tables.ii Revision Historyii 1 Call Transfer (CT).1 1.1 Normal Procedures with Successful
20、Outcome1 1.2 Exception Procedures or Unsuccessful Outcome .3 1.3 Alternative Procedures .4 1.4 Interactions with Other Wireless Services4 TIA-664.506-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 5
21、3 54 55 56 57 58 59 60 List of Tables 506-ii List of Tables Table 1: Holding 2Way State for Call Transfer.2 Table 2: 3-Way State for Call Transfer2 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
22、, Revision 0 June 1996 Initial ANSI publication ANSI/TIA/EIA/664-506-A July 2000 Updated ANSI publication TIA-664.506-B September 2007 Updated publication TIA-664.506-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
23、 48 49 50 51 52 53 54 55 56 57 58 59 60 506-1 Call Transfer (CT) 1 Call Transfer (CT) Call Transfer (CT) enables the subscriber to transfer an in-progress established call to a third party. The call to be transferred may be an incoming or outgoing call. While CT is invoked, CT impacts the subscriber
24、s ability to receive calls. After CT is finished or when CT is not invoked, CT does not impact a subscribers ability to originate calls or to receive calls. Applicability to Telecommunications Services CT is applicable to voice telecommunication services. 1.1 Normal Procedures with Successful Outcom
25、e Authorization CT may be generally available or may be provided after prearrangement with the service provider. Deauthorization CT may be withdrawn at the subscribers request or for administrative reasons. Registration CT has no registration. Deregistration CT has no deregistration. Activation CT s
26、hall be activated upon authorization. Deactivation CT shall be deactivated upon deauthorization. Invocation CT may be invoked by an authorized subscriber putting a call on hold, dialing a third party and then disconnecting. TIA-664.506-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
27、 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 Transfer (CT) 506-2 CT may be invoked by a subscriber with both CT and Three-Way Calling activated by establishing a three-way call and then disconnecting. Normal Operation with Successf
28、ul Outcome CT allows a controlling subscriber to put a call on hold, dial a third party, and then connect the held party and the third party into a call. The following table defines the system reactions for each call party action that are different than Three-Way Calling (3WC). Refer to Three-Way Ca
29、lling normal operations with successful outcome for the system reaction tables rather than repeating the information here. Table 1: Holding 2Way State for Call Transfer State Holding 2-way Condition One party is on hold. The controlling subscriber is alerting the other party, or the controlling subs
30、criber is in a two-way conversation with a third party. XID Call Party Action System Reaction 5E 1 The controlling subscriber presses the END key. Release the controlling subscriber. Connect the held party and the third party. Optionally apply a warning tone. Go to the Idle state. 5A 1 5F 1 5S 1 5U
31、1 To avoid transferring the call or to drop the third party, the controlling subscriber without Three-Way Calling active presses the SEND key with or without digits. Ignore any accompanying digits. Release the third party. Connect the held party and the controlling subscriber. Optionally apply a war
32、ning tone. Go to the 2-way state. CT also allows a controlling subscriber, which also has Three-Way Calling (3WC) active, to set up a three-way call and then drop out of the call leaving the other two parties of the call connected to each other. The following table defines the system reactions for e
33、ach call party action that are different than Three-Way Calling (3WC). Refer to Three-Way Calling normal operations with successful outcome for the system reaction tables rather than repeating the information here. Table 2: 3-Way State for Call Transfer State 3-way Condition A connection is establis
34、hed between the controlling subscriber, a second party and a third party. XID Call Party Action System Reaction 6E 1 The controlling subscriber presses the END key. Release the controlling subscriber. Connect the second party and the third party. Optionally apply a warning tone. Go to the dle state.
35、 ITIA-664.506-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 60 506-3 Call Transfer (CT) Call Detail Record The system should record call detail information for the following: a
36、. CT invocation activities and events. b. CT bridge usage duration. c. Actual air time usage duration. d. Transfer-to call leg usage. See DMH for the specific information to be included for each element. 1.2 Exception Procedures or Unsuccessful Outcome Registration None identified. Deregistration No
37、ne identified. Activation None identified. Deactivation None identified. Invocation The CT request shall be rejected when the invoking subscriber is not authorized. The subscriber may be notified of the rejection cause, and the established end-to-end connection shall remain in the state existing pri
38、or to the request. Refer to Three-Way Calling exception procedures or unsuccessful outcome for invocation for the system reaction tables rather than repeating the information here. Exceptions While Roaming None identified. Exceptions During Intersystem Handoff None identified. TIA-664.506-B 1 2 3 4
39、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 Call Transfer (CT) 506-4 1.3 Alternative Procedures An alternative procedure has been identified for CT. This procedure builds upon the n
40、ormal CT procedures. Refer to the alternative procedures of Three-Way Calling (see TIA-664.522) for the system reaction tables. 1.4 Interactions with Other Wireless Services Asynchronous Data Service (ADS) CT does not support ADS. Call Delivery (CD) None identified. Call ForwardingBusy (CFB) None id
41、entified. Call ForwardingDefault (CFD) None identified. Call ForwardingNo Answer (CFNA) None identified. Call ForwardingUnconditional (CFU) None identified. Call Transfer (CT) Not applicable. Call Waiting (CW) CT and CW are mutually exclusive. A call incoming to a controlling subscriber setting up o
42、r engaged in a CT shall be given busy treatment, even if the called subscriber has CW active. A flash request (i.e., pressing the SEND key) from a subscriber authorized for CT while CW alerting is being applied, shall be used to respond to the CW call. If the controlling subscriber still desires to
43、transfer the call, it must first dispose of the CW call before requesting a transfer. TIA-664.506-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 60 506-5 Call Transfer (CT) Call
44、ing Name Presentation (CNAP) None identified. Calling Name Restriction (CNAR) If the CT controlling subscriber is authorized for a Variable Per-Call CNAR Mode and activates CNAR during the setup of a CT leg, the CNAR activation applies only to that call leg. If the CT controlling subscriber is autho
45、rized for a Variable Per-Call CNAR Mode and deactivates CNAR during the setup of a CT leg, the CNAR deactivation applies only to that call leg. Calling Number Identification Presentation (CNIP) None identified. Calling Number Identification Restriction (CNIR) If the CT controlling subscriber activat
46、es the Temporary CNIR Mode during the setup of a CT leg, then the Temporary CNIR activation applies only to that call leg. If the CT controlling subscriber deactivates the Temporary CNIR Mode during the setup of a CT leg, then the Temporary CNIR deactivation applies only to that call leg. Conference
47、 Calling (CC) Once CT is invoked, CT takes precedence over CC. That is, the controlling subscriber cannot add more parties to a CT (in effect trying to convert the CT call into a CC). Once CC is invoked, CC takes precedence over CT. That is, the conference controller cannot transfer a conference in
48、progress or relinquish control of the conference to one of the conferees. Data Privacy (DP) CT does not support DP. Do Not Disturb (DND) None identified. Emergency Services (9-1-1) If a subscriber with CT invokes 9-1-1 during a call or with a call on hold (thereby seemingly invoking CT), transfer sh
49、all not take place if the controlling subscriber disconnects. Also, a flash (an activation of the SEND key) while communicating with TIA-664.506-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 Call Transfer (CT) 506-6 a PSAP is used to bridge the held party into the conversation rather than to disconnect the PSAP. If 9-1-1 is invoked while idle, flash requests and attempts to a third number are ignored. Flexible Alerting (FA) None identified. Group 3 Fa
