Pre NNP 1 Pre NNP A call is

Pre NNP 1 Pre NNP A call is

Pre NNP 1 Pre NNP A call is originated Slides 14-22 Is the Dialed Number Local Yes Slides 7-13 Local Switch determines if Dialed NPA NXX is portable No No Originating Switching Network Queries

Database for LRN Yes Slides 3-6 Call is routed to the appropriate terminating end office or network for termination to subscribers Line Based upon query Response (CdPN/LRN,) Call is routed to Inter Switch trunk toward terminating network Originating Switching Network Determines Calling Numbers presubscribed IXC IXC Queries Database for LRN

Slides 17-22 Yes IXC Switch determines if Dialed NPA NXX is portable Based upon query Response (CdPN/LRN,) Call is routed to Inter Switch trunk toward terminating network No Slides 14-16 Call is routed to the appropriate terminating end office or network for termination to subscribers Line 2 Pre NNP PSTN Class 5 Non-portable NXX Intra Switch Local Call Routed to Subscriber Class 5 Switch

A B C D E 3 Pre NNP PSTN Class 5 to Class 5 Non-Portable NXX Inter Switch Local Call Routed to Subscriber Class 5 Switch A B C D E ISUP Trunk F 4 Pre NNP PSTN Class 5 to Class 4 to Class 5 Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Switch

Class 4 Switch A B C D E ISUP Trunk F 5 Pre NNP PSTN Class 5 to Class 4 to Class 5 Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Switch Class 4 Switch Class 4 Switch A B C D

E ISUP Trunk F 6 Pre NNP PSTN Class 5 Portable NXX Non-Ported Number Intra Switch Local Call Routed to Subscriber Class 5 Switch LNP Database A B C D E LNP Query CdPN F G 7 Pre NNP

PSTN Class 5 to Class 5 Portable NXX Non-Ported Number Intrer Switch Local Call Routed to Subscriber Class 5 Switch LNP Database A B C D E F LNP Query CdPN ISUP Trunk G H 8 Pre NNP PSTN Class 5 to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch LNP

Database Class 4 Switch A B C D E LNP Query CdPN F G ISUP Trunk H 9 Pre NNP PSTN Class 5 to Class 4 to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch LNP Database

Class 4 Switch Class 4 Switch A B C D E LNP Query CdPN F G ISUP Trunk H 10 Pre NNP PSTN Class 5 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch LNP Database

A B C D E LNP Query LRN F G ISUP Trunk CdPN = LRN, GAP = DN, M-bit = 1 H 11 Pre NNP PSTN Class 5 to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch

A B C D E LNP Query LRN F G ISUP Trunk H 12 Pre NNP PSTN Class 5 to Class 4 to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch Class 4 Switch

A B C D LNP Query LRN E F G ISUP Trunk H 13 Pre NNP PSTN Class 5 to IXC to Class 5 Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch IXC LNP Database A B

C D LNP Query E CdPN F G ISUP Trunk H 14 Pre NNP PSTN Class 5 to Class 4 to IXC to Class 5 Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database A

B C D LNP Query E CdPN F G ISUP Trunk H 15 Pre NNP PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database

Class 4 Switch A B C D LNP Query E CdPN F G ISUP Trunk H 16 Pre NNP PSTN Class 5 to IXC to Class 5 Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch IXC LNP Database

A B C D LNP Query E LRN F G ISUP Trunk H 17 Pre NNP PSTN Class 5 to Class 4 to IXC to Class 5 Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP

Database A B C D LNP Query E LRN F G ISUP Trunk H 18 Pre NNP PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC

LNP Database Class 4 Switch A B C D LNP Query E LRN F G ISUP Trunk H 19 NLRN Option 1 20 NNP NLRN Option 1

Query by IXC A call is originated Switch Determines Calling Numbers presubscribed IXC Slides 31-44 Yes Switch determines if Dialed NPA NXX is portable Slides 39-44 Yes No Slides 25-31 Call is routed to the appropriate terminating end office or network for

termination to subscribers Line Based on LRN, Call is routed to Inter Switch trunk toward terminating network Call is rejected by Calling Numbers IXC Slides 32-35 Yes Is the Dialed Number Local Yes Is the Dialed Number Local No

Slides 36-38 Call is routed to the appropriate terminating end office or network for termination to subscribers Line IXC Queries Database for LRN Call is rejected by Calling Numbers IXC Slides 32-38 No Slides 42-44 Slides 38-41 No Is the Dialed Number Ported Call is routed to the appropriate terminating

end office or network for termination to subscribers Line 21 NNP NLRN Option 1 Query by IXC PSTN Class 5 Non-portable NXX Intra Switch Local Call Routed to Subscriber Class 5 Switch A B C D E 22 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 5 Non-Portable NXX Inter Switch Local Call Routed to Subscriber Class 5 Switch A B C

D E ISUP Trunk F 23 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 5 Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Switch Class 4 Switch A B C D E ISUP Trunk F 24

NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 5 Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Switch Class 4 Switch Class 4 Switch A B C D E ISUP Trunk F 25 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5

Switch IXC A B C D E ISUP Trunk F 26 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 5 Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC A B C

D E ISUP Trunk F 27 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC Class 4 Switch A B C D E ISUP Trunk

F 28 NNP NLRN Option 1 Query by IXC PSTN Class 5 Portable NXX Non-Ported Number Intra Switch Local Call Routed to Subscriber Class 5 Switch IXC LNP Database A B C D LNP Query CdPN E F G H 29

NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 5 Portable NXX Non-Ported Number Intrer Switch Local Call Routed to Subscriber Class 5 Switch IXC LNP Database A B C LNP Query D CdPN E F G ISUP Trunk H

30 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database A B C LNP Query D CdPN E F G ISUP Trunk

H 31 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database Class 4 Switch A B C LNP Query D CdPN

E F G ISUP Trunk H 32 NNP NLRN Option 1 Query by IXC PSTN Class 5 to IXC to Class 5 Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch IXC LNP Database A B C LNP Query D CdPN

E F ISUP Trunk G 33 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 5 Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber . Class 5 Switch Class 4 Switch IXC LNP Database A B C D LNP Query

E CdPN F ISUP Trunk G 34 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database Class 4 Switch

A B C D LNP Query E CdPN F ISUP Trunk G 35 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch IXC LNP Database

A B C LNP Query D LRN E F ISUP Trunk G H 36 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC

LNP Database A B C LNP Query D LRN E F G ISUP Trunk H 37 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch Class 4 Switch

IXC LNP Database Class 4 Switch A B C LNP Query D LRN E F G ISUP Trunk H 38 NNP NLRN Option 1 Query by IXC PSTN Class 5 to IXC to Class 5 Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber

Class 5 Switch IXC LNP Database A B C LNP Query D LRN E F ISUP Trunk G 39 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 5 Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber

Class 5 Switch Class 4 Switch IXC LNP Database A B C LNP Query D LRN E F ISUP Trunk G 40 NNP NLRN Option 1 Query by IXC

PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database Class 4 Switch A B C LNP Query D LRN E F ISUP Trunk G

41 NLRN Option 2 42 NNP NLRN Option 2 Portable = LD A call is originated Switch Determines Calling Numbers presubscribed IXC Slides 54-66 Yes Switch determines if Dialed NPA NXX is portable No

IXC Queries Database for LRN Based on CDPN, Call is routed to Inter Switch trunk toward terminating network Based on LRN, Call is routed to Inter Switch trunk toward terminating network Slides 54-60 Slides 61-66 No Yes Slides 47-53 Call is routed to the appropriate terminating end office or network for termination to

subscribers Line Call is routed to the appropriate terminating end office or network for termination to subscribers Line Is the Dialed Number Ported Call is routed to the appropriate terminating end office or network for termination to subscribers Line 43 NNP NLRN Option 2 Portable = LD2 PSTN Class 5 Non-portable NXX Intra Switch Local Call Routed to Subscriber Class 5 Switch A B C D

E 44 NNP NLRN Option 2 Portable = LD Portable = LDPSTN Class 5 to Class 5 Non-Portable NXX Inter Switch Local Call Routed to Subscriber Class 5 Switch A B C D E ISUP Trunk F 45 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 5 Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Switch

Class 4 Switch A B C D E ISUP Trunk F 46 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 5 Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Switch Class 4 Switch Class 4 Switch A B C

D E ISUP Trunk F 47 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch IXC A B C D E ISUP Trunk F 48 NNP NLRN

Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 5 Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC A B C D E ISUP Trunk F 49 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch

Class 4 Switch IXC Class 4 Switch A B C D E ISUP Trunk F 50 NNP NLRN Option 2 Portable = LD PSTN Class 5 Portable NXX Non-Ported Number Intra Switch Local Call Routed to Subscriber Class 5 Switch IXC LNP Database

A B C D LNP Query CdPN E F G 51 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 5 Portable NXX Non-Ported Number Intrer Switch Local Call Routed to Subscriber Class 5 Switch IXC LNP Database A B C

LNP Query D CdPN E F ISUP Trunk G 52 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database A

B C LNP Query D CdPN E F ISUP Trunk G 53 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database

Class 4 Switch A B C LNP Query D CdPN E F ISUP Trunk G 54 NNP NLRN Option 2 Portable = LD PSTN Class 5 to IXC to Class 5 Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch IXC

LNP Database A B C LNP Query D CdPN E F ISUP Trunk G 55 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 5 Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber . Class 5 Switch Class 4 Switch

IXC LNP Database A B C D LNP Query E CdPN F ISUP Trunk G 56 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch

Class 4 Switch IXC LNP Database Class 4 Switch A B C D LNP Query E CdPN F ISUP Trunk G 57 NNP NLRN Option 2

Portable = LD PSTN Class 5 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch IXC LNP Database A B C LNP Query D LRN E F ISUP Trunk G 58 NNP NLRN Option 2 Portable = LD

PSTN Class 5 to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database A B C LNP Query D LRN E F ISUP Trunk G 59 NNP NLRN

Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database Class 4 Switch A B C LNP Query D LRN E F ISUP Trunk

G 60 NNP NLRN Option 2 Portable = LD PSTN Class 5 to IXC to Class 5 Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch IXC LNP Database A B C LNP Query D LRN E F ISUP Trunk G

61 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 5 Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database A B C LNP Query D LRN E F ISUP Trunk

G 62 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC LNP Database Class 4 Switch A B C LNP Query D LRN

E F ISUP Trunk G 63 NLRN Option 3 64 NNP NLRN Option 3 Query by Originating Switch A call is originated Slides 73-88 Switch determines if Dialed NPA NXX is portable Originating Switching

Network Queries Database for LRN Slide 83-85 No Slides 80-88 Yes Is the LRN Within the LATA No No Slides 66-72 Call is routed to the appropriate terminating end office or network for termination to subscribers Line Yes Is the

Dialed Number Local Yes Is the Dialed Number Ported Slide 86-88 No Slides 80-85 Originating Switching Network Determines Calling Numbers Presubscribed IXC Slides 73-79 Originating Switching Network Determines Calling Numbers Presubscribed

IXC Yes Based on LRN, Call is routed to Inter Switch trunk toward terminating network Slide 80-82 Is the Dialed Number Local No Slides 73-76 Yes Slides 77-79 Call is routed to the appropriate terminating end office or network for termination to subscribers Line Call is routed to the appropriate terminating end office or network for

termination to subscribers Line 65 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 Non-portable NXX Intra Switch Local Call Routed to Subscriber Class 5 Switch A B C D E 66 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 5 Non-Portable NXX Inter Switch Local Call Routed to Subscriber Class 5 Switch A B C D

E ISUP Trunk F 67 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 5 Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Switch Class 4 Switch A B C D E ISUP Trunk F 68 NNP NLRN

Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 5 Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Switch Class 4 Switch Class 4 Switch A B C D E ISUP Trunk F 69 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch

IXC A B C D E ISUP Trunk F 70 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 5 Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC A B C D

E ISUP Trunk F 71 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Switch Class 4 Switch IXC Class 4 Switch A B C D E ISUP Trunk

F 72 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 Portable NXX Non-Ported Number Intra Switch NNP Local Call Routed to Subscriber Class 5 Switch LNP Database A B C D LNP Query CdPN E F G 73 NNP NLRN Option 3 Query by Originating Switch

PSTN Class 5 to Class 5 Portable NXX Non-Ported Number Inter Switch NNP Local Call Routed to Subscriber Class 5 Switch LNP Database A B LNP Query C CdPN D E F G ISUP Trunk H 74 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber

Class 5 Switch LNP Database Class 4 Switch A B C D LNP Query CdPN E F G ISUP Trunk H 75 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber

Class 5 Switch LNP Database Class 4 Switch Class 4 Switch A B C D LNP Query CdPN E F G ISUP Trunk H 76 NNP NLRN Option 3

Query by Originating Switch PSTN Class 5 to IXC to Class 5 Portable NXX Non-Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 Switch LNP Database IXC A B C D LNP Query CdPN E F G ISUP Trunk H 77 NNP NLRN Option 3 Query by Originating Switch

PSTN Class 5 to Class 4 to IXC to Class 5 Portable NXX Non-Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch IXC A B C D LNP Query CdPN E F G ISUP Trunk H 78 NNP NLRN

Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Portable NXX Non-Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch IXC Class 4 Switch A B C D LNP Query CdPN E F G ISUP Trunk

H 79 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 5 Portable NXX Ported Number Inter Switch NNP Local Call Routed to Subscriber Class 5 Switch LNP Database A B LNP Query C D LRN E F G H ISUP Trunk I

80 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch A B C D LNP Query LRN E F G ISUP Trunk H I

81 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 4 to Class 5 Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch Class 4 Switch A B C D LNP Query LRN E F G ISUP Trunk

H I 82 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to IXC to Class 5 Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 Switch LNP Database IXC A B C D LNP Query LRN E F G ISUP Trunk

H I 83 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 5 Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch IXC A B C D LNP Query LRN E F G

ISUP Trunk H I 84 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch IXC Class 4 Switch A B C D LNP Query LRN

E F G ISUP Trunk H I 85 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to IXC to Class 5 Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 Switch LNP Database IXC A B C D LNP Query LRN

E F ISUP Trunk G H 86 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 5 Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch IXC A B C D LNP Query LRN

E F ISUP Trunk G H 87 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5 Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 Switch LNP Database Class 4 Switch IXC Class 4 Switch A B C

D LNP Query LRN E F G ISUP Trunk H 88 SIP Call Flows VoIP Non-NNP Ported Number INVITE SIP URL: [email protected], Route 2 SBC INVITE E.164: B UAS (B2BUA) E.164

LRN LNP DB LRN SBC ROUTES RS INVITE E.164: B UAC LSMS NPAC Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party VoIP NNP Ported Number INVITE SIP URL: [email protected] ADD 192.76.120.192 IP ADD

192.76.120.1 92 SBC INVITE E.164: B UAS (B2BUA) E.164 SIP URL LNP DB DOMAIN B SBC IP ADD RS INVITE E.164: B UAC LSMS

NPAC Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party VoIP Non-Ported Number INVITE SIP URL: [email protected], Route 2 SBC INVITE E.164: B UAS (B2BUA) E.164 NO RESULT LNP DB E.164 SBC

ROUTES RS INVITE E.164: B UAC LSMS NPAC Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party Wireless Call Flows Wireless Non-NNP Ported Number INVITE SIP URL: [email protected], Route 2 S-CSCF INVITE E.164: B P-CSCF

E.164 LRN LNP DB LRN IP ADD I-CSCF ROUTES RS INVITE E.164: B UE (A) LSMS NPAC Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party

Wireless NNP Ported Number INVITE SIP URL: [email protected] ADD S-CSCF INVITE E.164: B P-CSCF E.164 SIP URL IP ADD DOMAIN B IP ADD ENUM DNS LSMS NPAC INVITE E.164: B

UE (A) I-CSCF Wireless Non-Ported Number INVITE SIP URL: [email protected], Route 2 S-CSCF INVITE E.164: B P-CSCF E.164 NO RESULT LNP DB IP ADD E.164 I-CSCF ROUTES RS

INVITE E.164: B UE (A) LSMS NPAC Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party

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