1、 TIA-664.522-B (Revision of TIA-664.522-A) October 2007Wireless Features Description: Three-Way Calling (3WC) ANSI/TIA-664.522-B-2007 APPROVED: OCTOBER 10, 2007 REAFFIRMED: JANUARY 29, 2013 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminatin
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19、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 60 522-i Contents Wireless Features Description: Three-Way Calling Contents List of Figures .ii List of Tables.ii Revision Historyii 1 Three-Way Calling (3WC) .1 1.1
20、 Normal Procedures with Successful Outcome1 1.2 Exception Procedures or Unsuccessful Outcome .7 1.3 Alternative Procedures .9 1.4 Interactions with Other Wireless Services9 TIA-664.522-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
21、 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 List of Figures 522-ii List of Figures Figure 1: 3-Way State Diagram.6 List of Tables Table 1: 2-Way State for Three-Way Calling2 Table 2: Adding On State for Three-Way Calling.3 Table 3: Holding 2-Way State for Three-Way Calling4 Table 4: 3-
22、Way State for Three-Way Calling5 Table 5: 2-Way State for Three-Way CallingException7 Table 6: Adding On State for Three-Way CallingException.8 Table 7: 2-Way State for Three-Way CallingAlternative 9 Revision History Revision Date Remarks IS-53, Revision 0 August 1991 Initial publication IS-53, Revi
23、sion A May 1995 Updated publication ANSI/TIA/EIA-664, Revision 0 June 1996 Initial ANSI publication ANSI/TIA/EIA/664-522-A July 2000 Updated ANSI publication TIA-664.522-B September 2007 Updated publication TIA-664.522-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 3
24、0 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 60 522-1 Three-Way Calling (3WC) 1 Three-Way Calling (3WC) Three-Way Calling (3WC) provides the subscriber the capability of adding a third party to an established two-party call, so that all three parties may c
25、ommunicate in a three-way call. If either of the two non-controlling parties to an established three-way call disconnects, the remaining party is reconnected to the controlling subscriber as a normal two-party call. If the controlling subscriber of a three-way call disconnects, the conference circui
26、t and all other parties are released. Digits included with flash requests when a termination address is not expected may be ignored. Applicability to Telecommunications Services 3WC is applicable to voice telecommunication services. 1.1 Normal Procedures with Successful Outcome Authorization 3WC may
27、 be generally available or may be provided after prearrangement with the service provider. Deauthorization 3WC may be withdrawn at the subscribers request or for administrative reasons. Registration 3WC has no registration. Deregistration 3WC has no deregistration. Activation 3WC is activated upon a
28、uthorization. Deactivation 3WC shall be deactivated upon deauthorization. TIA-664.522-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 Three-Way Calling (3WC) 522-2 Invocation
29、3WC is invoked when the appropriate flash request is sent and the feature is authorized. Normal Operation With Successful Outcome 3WC allows a controlling subscriber to add a third party to an existing two-way call. If necessary, the last party added to a call may be dropped. The following tables de
30、fine the system reactions for each call party action. Table 1: 2-Way State for Three-Way Calling State 2-way Condition The controlling subscriber is alerting the other party, or the controlling subscriber is in a two-way conversation with the other party. XID Call Party Action System Reaction 3S 3 T
31、he controlling subscriber presses the SEND key without digits while in a wo-way conversation. tPut the other party on hold. Apply prompting treatment. Go to the Adding on state. TIA-664.522-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
32、40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 522-3 Three-Way Calling (3WC) Table 2: Adding On State for Three-Way Calling State Adding on Condition One party is on hold. The system is waiting for the controlling subscriber to enter a feature code or the address of a third party. XI
33、D Call Party Action System Reaction 4S The controlling subscriber presses the SEND key without digits. Reconnect the held party. Optionally apply a warning tone. Go to the 2-way state. 4E The controlling subscriber presses the END key. Release the controlling subscriber. Apply distinctive recall ale
34、rting to the controlling subscriber to recall the held party. Optionally apply audible alerting to the held party. Go to the Alerting state. 4A The controlling subscriber enters the third party termination address, as in: termination address + SEND . Attempt to establish a connection to the third pa
35、rty specified by the termination address allowing the controlling subscriber to hear call progress tones and announcements. Go to the Holding 2-way state. 4F 2 The controlling subscriber enters a feature code, as in: *FC + digits + SEND . Act upon the feature code. Apply feature confirmation treatme
36、nt. Go to the Holding 2-way state. 4I 2 An incoming call arrives for the controlling subscriber. Apply busy treatment to the calling party. Remain in the adding on state. 4H 2 The held party disconnects. Release the held party. The voice channel may be released. Any further action by the subscriber
37、is treated as a new service request. o to the Idle state. GTIA-664.522-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 Three-Way Calling (3WC) 522-4 Table 3: Holding 2-Way Sta
38、te for Three-Way Calling State Holding 2-way Condition One party is on hold. The controlling subscriber is alerting the other party, or the controlling subscriber is in a two-way conversation with a third party. XID Call Party Action System Reaction 5S 2 The controlling subscriber presses the SEND k
39、ey without digits. Connect the controlling, held and third parties into a three-way call. Optionally apply a warning tone. Go to the 3-way state. 5E 2 The controlling subscriber presses the END key. Release the controlling subscriber and the third party. Apply distinctive recall alerting to the cont
40、rolling subscriber to recall the held party. Optionally apply audible alerting to the held party. Go to the Alerting state. 5A 2 5F 2 5U 2 The controlling subscriber enters digits, as in: digits + SEND . Ignore any accompanying digits. Connect the controlling, held and third parties into a three-way
41、 call. Optionally apply a warning tone. Go to the 3-way state. 5N The third party answers. Allow a conversation with the third party. Remain in the Holding 2-way state. 5T The third party disconnects. Release the third party. Optionally apply a warning tone. Connect the held party. Go to the 2-way s
42、tate. 5I An incoming call arrives for the controlling subscriber. Apply busy treatment to the calling party. Remain in the Holding 2-way state. 5H The held party disconnects. Release the held party. Go to the 2-way state. TIA-664.522-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 2
43、5 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 60 522-5 Three-Way Calling (3WC) Table 4: 3-Way State for Three-Way Calling State 3-way Condition A connection is established between the controlling subscriber, a second party and a third party.
44、XID Call Party Action System Reaction 6S The controlling subscriber presses the SEND key without digits. Release the third party. Optionally apply a warning tone. Connect the controlling subscriber and the second party. Go to the 2-way state. 6E 2 The controlling subscriber presses the END key. Rele
45、ase the controlling subscriber and the two other parties. Go to the Idle state. 6A 6F 6U The controlling subscriber enters digits, as in: digits + SEND . Ignore any accompanying digits. Release the third party. Optionally apply a warning tone. Connect the controlling subscriber and the second party.
46、 Go to the 2-way state. 6N The third party answers. Allow a conversation with the third party. Remain in the 3-way state. 6T The third party disconnects. Release the third party. Optionally apply a warning tone. Connect the controlling subscriber and the second party. Go to the 2-way state. 6I An in
47、coming call arrives for the controlling subscriber. Apply busy treatment to the calling party. Remain in the 3-way state. 6D The second party disconnects. Release the second party. Optionally apply a warning tone. Connect the controlling subscriber and the third party. Go to the -way state. 2TIA-664
48、.522-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 Three-Way Calling (3WC) 522-6 The following diagram describes the state transitions for the Three Way Calling feature: 1:
49、Idle4: Adding on5: Holding 2-way6: 3-way2: AlertingP1 answers Connect(P1,P2)P1 presses END Release P1, W!P1: SEND (3-way calling active) Connect(P1,P2,P3)3S32DP2AFSU13: 2-wayP1: SEND then ignore any accompanying digits and apply denial treatment. Retain onnections. Remain in the 2-way state. cTIA-664.522-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 Three-Way Calling (3WC) 522-8 Table 6: Adding On State for Three-Way CallingException State Adding on C
