Tech-invite 3GPPspace IETFspace

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Content for TR 23.897 Word version: 12.0.0

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6 Solution Alternatives p. 8

6.1 IBCF and Transit reuse p. 8

6.1.1 High level architecture p. 8

6.1.2 High level Flows p. 9

6.1.2.1 General p. 9

6.1.2.2 Terminating procedures p. 9

6.1.2.3 Originating procedures p. 10

6.1.3 Required provisioning in the network p. 12

6.1.3.1 Initial configuration at solution roll-out p. 12

6.1.3.2 Provisioning when adding a new IP-PBX p. 12

6.1.3.3 Provisioning when adding/modifying extensions behind an IP-PBX p. 12

6.2 enhanced IBCF p. 12

6.2.1 High level architecture p. 12

6.2.1.1 eIBCF p. 12

6.2.1.2 Cx' reference point p. 13

6.2.2 Session setup p. 13

6.2.3 PBX is deleted in the HSS p. 14

6.3 IBCF and S-CSCF reuse p. 14

6.3.1 High level architecture p. 14

6.3.2 High level Flows p. 15

6.3.2.1 Terminating procedures p. 15

6.3.2.2 Originating procedures p. 16

6.3.3 Required provisioning in the network p. 17

6.3.3.1 Initial configuration at solution roll-out p. 17

6.3.3.2 Provisioning when adding a new IP-PBX p. 17

6.3.3.3 Provisioning when adding/modifying extensions behind an IP-PBX p. 17

6.4 P-CSCF based p. 17

6.4.1 High level architecture p. 17

6.4.2 P-CSCF preconfigured with IP-PBX data p. 18

6.4.3 P-CSCF without provisioning of IP-PBX data p. 18

6.4.3.1 High-level principles p. 18

6.4.3.2 IMS Registration flow p. 20

6.4.3.3 Required provisioning in the network p. 21

6.4.3.3.1 Initial configuration at solution roll-out p. 21

6.4.3.3.2 Provisioning when adding a new IP-PBX p. 21

6.4.3.3.3 Provisioning when adding/modifying extensions behind an IP-PBX p. 21

6.5 Standalone BusTI-GW solution p. 21

6.5.1 High level architecture p. 21

6.5.1.1 BusTI-GW p. 21

6.5.2 Registration and session setup p. 22

6.5.3 Deregistration p. 22

6.5.4 Required provisioning in the network p. 22

6.5.4.1 Initial configuration at solution roll-out p. 22

6.5.4.2 Provisioning when adding a new IP-PBX p. 22

6.5.4.3 Provisioning when adding/modifying extensions behind an IP-PBX p. 22

6.6 S-CSCF Based Routing p. 23

6.6.1 General p. 23

6.6.2 Terminating Session Setup p. 23

6.6.3 Originating Session Setup p. 25

6.6.4 Required provisioning in the network p. 25

6.6.4.1 Initial configuration at solution roll-out p. 25

6.6.4.2 Provisioning when adding a new IP-PBX p. 25

6.6.4.3 Provisioning when adding/modifying extensions behind an IP-PBX p. 25

7 Alternatives Assessment and Conclusions p. 26

7.1 Alternatives evaluation criteria and scoring p. 26

7.2 Overview of provisioning efforts p. 29

7.3 Conclusions p. 30

$ Change history p. 31