Pre NNP.

Pre NNP

IXC Queries Database for LRN
A call is originated Pre NNP IXC Queries Database for LRN Originating Switching Network Determines Calling Number’s presubscribed IXC Is the Dialed Number Local Slides 14-22 No Originating Switching Network Queries Database for LRN Slides 17-22 Based upon query Response (CdPN/LRN,) Call is routed to Inter Switch trunk toward terminating network Yes IXC Switch determines if Dialed NPA NXX is portable Local Switch determines if Dialed NPA NXX is portable Yes Slides 7-13 Yes Based upon query Response (CdPN/LRN,) Call is routed to Inter Switch trunk toward terminating network No Slides 3-6 No Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line Slides 14-16 Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line

A B C D E Class 5 Switch Originate call
Pre NNP PSTN Class 5 – Non-portable NXX Intra Switch Local Call Routed to Subscriber Class 5 Switch A B C D E Originate call Dialed number is determined to be local Dialed number is determined to be non-portable Dialed number is determined to be intra-switch Call is routed to terminating subscriber

A B C D E F Class 5 Switch ISUP Trunk Originate call
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 ISUP Trunk E F Originate call Dialed number is determined to be local Dialed number is determined to be non-portable Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

A B C D E F Class 5 Switch Class 4 Switch ISUP Trunk Originate call
Pre NNP PSTN Class 5 to Class 4 to Class 5 – Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 4 Switch Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be local Dialed number is determined to be non-portable Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

A B C D E F Class 4 Switch Class 4 Switch Class 5 Switch ISUP Trunk
Pre NNP PSTN Class 5 to Class 4 to Class 5 – Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 4 Switch Class 4 Switch Class 5 Switch A B C D E ISUP Trunk F Originate call Dialed number is determined to be local Dialed number is determined to be non-portable Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

A B C D E F G Class 5 Switch LNP Database LNP Query CdPN
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 LNP Query D CdPN E F Originate call Dialed number is determined to be local Dialed number is determined to be portable LNP query is launched CdPN is returned CdPN is determined to be intra-switch Call is routed to terminating subscriber G

A B C D E F G H Class 5 Switch ISUP Trunk LNP Database LNP Query CdPN
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 LNP Query D CdPN E F Originate call Dialed number is determined to be local Dialed number is determined to be portable LNP query is launched CdPN is returned Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

A B C D E F G H Class 5 Switch Class 4 Switch ISUP Trunk LNP Database
Pre NNP PSTN Class 5 to Class 4 to Class 5 – Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 4 Switch Class 5 Switch LNP Database A B C LNP Query D CdPN E F Originate call Dialed number is determined to be local Dialed number is determined to be portable LNP query is launched CdPN is returned Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

A B C D E F G H Class 4 Switch Class 4 Switch Class 5 Switch
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 4 Switch Class 4 Switch Class 5 Switch LNP Database A B C LNP Query D CdPN E F Originate call Dialed number is determined to be local Dialed number is determined to be portable LNP query is launched CdPN is returned Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

CdPN = LRN, GAP = DN, M-bit = 1
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 LNP Query D LRN E F Originate call Dialed number is determined to be local Dialed number is determined to be portable LNP query is launched LRN is returned Dialed number (LRN) is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G CdPN = LRN, GAP = DN, M-bit = 1 H

A B C D E F G H Class 5 Switch Class 4 Switch ISUP Trunk LNP Database
Pre NNP PSTN Class 5 to Class 4 to Class 5 – Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 4 Switch Class 5 Switch LNP Database A B C LNP Query D LRN E F Originate call Dialed number is determined to be local Dialed number is determined to be portable LNP query is launched LRN is returned Dialed number (LRN) is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

A B C D E F G H Class 4 Switch Class 4 Switch Class 5 Switch
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 4 Switch Class 4 Switch Class 5 Switch LNP Database A B C LNP Query D LRN E F Originate call Dialed number is determined to be local Dialed number is determined to be portable LNP query is launched LRN is returned Dialed number (LRN) is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

IXC A B C D E F G H Class 5 Switch ISUP Trunk LNP Database LNP Query
Pre NNP PSTN Class 5 to IXC to Class 5 – Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber IXC Class 5 Switch LNP Database A B C D LNP Query E CdPN F Originate call Dialed number is determined to be non-local Originating switch determines routing to IXC switch Dialed number is determined to be portable by IXC switch LNP query is launched CdPN is returned ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

IXC A B C D E F G H Class 5 Switch Class 4 Switch ISUP Trunk LNP
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 4 Switch IXC Class 5 Switch LNP Database A B C D LNP Query E CdPN F Originate call Dialed number is determined to be non-local Originating switch determines routing to IXC switch Dialed number is determined to be portable by IXC switch LNP query is launched CdPN is returned ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

IXC A B C D E F G H Class 4 Switch Class 4 Switch Class 5 Switch
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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C D LNP Query E CdPN F Originate call Dialed number is determined to be non-local Originating switch determines routing to IXC switch Dialed number is determined to be portable by IXC switch LNP query is launched CdPN is returned ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

Pre NNP PSTN Class 5 to IXC to Class 5 – Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber IXC Class 5 Switch LNP Database A B C D LNP Query E LRN F Originate call Dialed number is determined to be non-local Originating switch determines routing to IXC switch Dialed number is determined to be portable by IXC switch LNP query is launched LRN is returned ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch IXC Class 5 Switch LNP Database A B C D LNP Query E LRN F Originate call Dialed number is determined to be non-local Originating switch determines routing to IXC switch Dialed number is determined to be portable by IXC switch LNP query is launched LRN is returned ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C D LNP Query E LRN F Originate call Dialed number is determined to be non-local Originating switch determines routing to IXC switch Dialed number is determined to be portable by IXC switch LNP query is launched LRN is returned ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

NLRN Option 1

NNP NLRN Option 1 Query by IXC
A call is originated Based on LRN, Call is routed to Inter Switch trunk toward terminating network Switch Determines Calling Number’s presubscribed IXC Slides 31-44 Switch determines if Dialed NPA NXX is portable Yes Is the Dialed Number Local Slides 39-44 Yes Is the Dialed Number Local IXC Queries Database for LRN Yes Yes Call is rejected by Calling Number’s IXC No No Call is rejected by Calling Number’s IXC No Slides 32-38 Slides 42-44 Slides 25-31 Slides 38-41 Slides 36-38 No Is the Dialed Number Ported Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line Slides 32-35 Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line

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 Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be intra-switch Call is routed to terminating subscriber

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 Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

A B C D E F Class 5 Switch Class 4 Switch ISUP Trunk Originate call
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 4 Switch Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

A B C D E F Class 4 Switch Class 4 Switch Class 5 Switch ISUP Trunk
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 4 Switch Class 4 Switch Class 5 Switch A B C D E ISUP Trunk F Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

IXC A B C D E F Class 5 Switch ISUP Trunk Originate call
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 IXC Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be non-local Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

IXC A B C D E F Class 5 Switch Class 4 Switch ISUP Trunk
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 4 Switch IXC Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be non-local Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

IXC A B C D E F Class 4 Switch Class 4 Switch Class 5 Switch
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 4 Switch Class 4 Switch IXC Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be non-local Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

IXC A B C D E F G H Class 5 Switch LNP Database LNP Query CdPN
NNP NLRN Option 1 Query by IXC PSTN Class 5 – Portable NXX Non-Ported Number Intra Switch Local Call Routed to Subscriber IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) Dialed number is determined to be local IXC switch rejects call back to originating switch Call is routed to terminating subscriber G H

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 IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) IXC switch rejects call back to originating switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) IXC switch rejects call back to originating switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) IXC switch rejects call back to originating switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

IXC A B C D E F G Class 5 Switch ISUP Trunk LNP Database LNP Query
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 IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

IXC A B C D E F G Class 5 Switch Class 4 Switch ISUP Trunk LNP
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 4 Switch IXC Class 5 Switch LNP Database A B C D LNP Query E CdPN ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

IXC A B C D E F G Class 4 Switch Class 4 Switch Class 5 Switch
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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C D LNP Query E CdPN F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G

NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 5 – Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber IXC Class 5 Switch LNP Database A B C LNP Query D LRN E F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) IXC switch rejects call back to originating switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D LRN E F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) IXC switch rejects call back to originating switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D LRN E F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) IXC switch rejects call back to originating switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

IXC A B C D E F G Class 5 Switch ISUP Trunk LNP Database LNP Query LRN
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 IXC Class 5 Switch LNP Database A B C LNP Query D LRN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

IXC A B C D E F G Class 5 Switch Class 4 Switch ISUP Trunk LNP
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 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D LRN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

IXC A B C D E F G Class 4 Switch Class 4 Switch Class 5 Switch
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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D LRN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

NLRN Option 2

NNP NLRN Option 2 Portable = LD
A call is originated Switch Determines Calling Number’s presubscribed IXC Slides 54-66 Switch determines if Dialed NPA NXX is portable Yes 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 No Slides 54-60 Slides 61-66 Slides 47-53 Is the Dialed Number Ported No Yes Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line

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 Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be intra-switch Call is routed to terminating subscriber

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 Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

PSTN Class 5 to Class 4 to Class 5 – Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 4 Switch Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

PSTN Class 5 to Class 4 to Class 5 – Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 4 Switch Class 4 Switch Class 5 Switch A B C D E ISUP Trunk F Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

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 IXC Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be non-local Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

PSTN Class 5 to Class 4 to IXC to Class 5 – Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 4 Switch IXC Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be non-local Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

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 4 Switch Class 4 Switch IXC Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be non-local Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

PSTN Class 5 – Portable NXX Non-Ported Number Intra Switch Local Call Routed to Subscriber IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

PSTN Class 5 to Class 5 – Portable NXX Non-Ported Number Intrer Switch Local Call Routed to Subscriber IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

PSTN Class 5 to Class 4 to Class 5 – Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

PSTN Class 5 to IXC to Class 5 – Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber IXC Class 5 Switch LNP Database A B C LNP Query D CdPN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

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 4 Switch IXC Class 5 Switch LNP Database A B C D LNP Query E CdPN ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C D LNP Query E CdPN F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched CdPN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G

PSTN Class 5 to Class 5 – Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber IXC Class 5 Switch LNP Database A B C LNP Query D LRN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

PSTN Class 5 to Class 4 to Class 5 – Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D LRN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

PSTN Class 5 to Class 4 to Class 4 to Class 5 – Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D LRN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

PSTN Class 5 to IXC to Class 5 – Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber IXC Class 5 Switch LNP Database A B C LNP Query D LRN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

PSTN Class 5 to Class 4 to IXC to Class 5 – Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D LRN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B C LNP Query D LRN E ISUP Trunk F Originate call Dialed number is determined to be portable Originating switch determines routing to IXC switch LNP query is launched LRN is returned (“M” bit set) ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G

NLRN Option 3

NNP NLRN Option 3 Query by Originating Switch
A call is originated Originating Switching Network Queries Database for LRN Slide 83-85 Originating Switching Network Determines Calling Number’s Presubscribed IXC Slides 73-88 Is the LRN Within the LATA Is the Dialed Number Local No Switch determines if Dialed NPA NXX is portable Slides 80-88 Slides 80-85 Yes Yes Is the Dialed Number Ported Yes No Originating Switching Network Determines Calling Number’s Presubscribed IXC Yes Based on LRN, Call is routed to Inter Switch trunk toward terminating network Slide 86-88 No Slides 73-79 No Is the Dialed Number Local Slides 66-72 Slide 80-82 Slides 77-79 No Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line Call is routed to the appropriate terminating end office or network for termination to subscriber’s Line Slides 73-76 Yes

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 Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be intra-switch Call is routed to terminating subscriber

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 Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

PSTN Class 5 to Class 4 to Class 5 – Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 4 Switch Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

PSTN Class 5 to Class 4 to Class 5 – Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 4 Switch Class 4 Switch Class 5 Switch A B C D E ISUP Trunk F Originate call Dialed number is determined to be non-portable Dialed number is determined to be local Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

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 IXC Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be non-local Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

PSTN Class 5 to Class 4 to IXC to Class 5 – Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 4 Switch IXC Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be non-local Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

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 4 Switch Class 4 Switch IXC Class 5 Switch A B C D ISUP Trunk E F Originate call Dialed number is determined to be non-portable Dialed number is determined to be non-local Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber

PSTN Class 5 – Portable NXX Non-Ported Number Intra Switch NNP Local Call Routed to Subscriber Class 5 Switch LNP Database A B LNP Query C CdPN D E F Originate call Dialed number is determined to be portable LNP query is launched CdPN is returned Dialed number is determined to be local Originating Class 5 needs to have the capability to screen on the “M” Bit and lack of GAP value Dialed number is determined to be intra-switch Call is routed to terminating subscriber G

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 F Originate call Dialed number is determined to be portable LNP query is launched CdPN is returned Dialed number is determined to be local Originating Class 5 needs to have the capability to screen on the “M” Bit and lack of GAP value Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

PSTN Class 5 to Class 4 to Class 5 – Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 4 Switch Class 5 Switch LNP Database A B C LNP Query CdPN D E F Originate call Dialed number is determined to be portable LNP query is launched CdPN is returned Dialed number is determined to be local Originating Class 5 needs to have the capability to screen on the “M” Bit and lack of GAP value Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch Class 4 Switch Class 5 Switch LNP Database A B LNP Query C CdPN D E F Originate call Dialed number is determined to be portable LNP query is launched CdPN is returned Dialed number is determined to be local Originating Class 5 needs to have the capability to screen on the “M” Bit and lack of GAP value Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

PSTN Class 5 to IXC to Class 5 – Portable NXX Non-Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber IXC Class 5 Switch LNP Database A B LNP Query C CdPN D E F Originate call Dialed number is determined to be portable LNP query is launched CdPN is returned CdPN is determined to be non-local Originating Class 5 needs to have the capability to screen on the “M” Bit and lack of GAP value Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch IXC Class 5 Switch LNP Database A B LNP Query C CdPN D E F Originate call Dialed number is determined to be portable LNP query is launched CdPN is returned CdPN is determined to be non-local Originating Class 5 needs to have the capability to screen on the “M” Bit and lack of GAP value Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B LNP Query C CdPN D E F Originate call Dialed number is determined to be portable LNP query is launched CdPN is returned CdPN is determined to be non-local Originating Class 5 needs to have the capability to screen on the “M” Bit and lack of GAP value Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 LRN D E F Originate call Dialed number is determined to be portable LNP query is launched LRN is returned LRN is determined to be within the LATA Originating Class 5 needs to have the capability to screen the LRN against all NPA NXXs within the LATA Dialed number (GAP) is determined to be local Originating Class 5 needs to have the capability to screen the dialed number (GAP) against all NPA NXXs within Class 5 switch’s local/EAS dialing plan Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G ISUP Trunk H I

PSTN Class 5 to Class 4 to Class 5 – Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 4 Switch Class 5 Switch LNP Database A B C LNP Query LRN D E F Originate call Dialed number is determined to be portable LNP query is launched LRN is returned LRN is determined to be within the LATA Originating Class 5 needs to have the capability to screen the LRN against all NPA NXXs within the LATA Dialed number (GAP) is determined to be local Originating Class 5 needs to have the capability to screen the dialed number (GAP) against all NPA NXXs within Class 5 switch’s local/EAS dialing plan Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G ISUP Trunk H I

PSTN Class 5 to Class 4 to Class 4 to Class 5 – Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 4 Switch Class 4 Switch Class 5 Switch LNP Database A B LNP Query C LRN D E F Originate call Dialed number is determined to be portable LNP query is launched LRN is returned LRN is determined to be within the LATA Originating Class 5 needs to have the capability to screen the LRN against all NPA NXXs within the LATA Dialed number (GAP) is determined to be local Originating Class 5 needs to have the capability to screen the dialed number (GAP) against all NPA NXXs within Class 5 switch’s local/EAS dialing plan Dialed number is determined to be inter-switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G ISUP Trunk H I

PSTN Class 5 to IXC to Class 5 – Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber IXC Class 5 Switch LNP Database A B LNP Query C LRN D E F Originate call Dialed number is determined to be portable LNP query is launched LRN is returned LRN is determined to be within the LATA Originating Class 5 needs to have the capability to screen the LRN against all NPA NXXs within the LATA Dialed number (GAP) is determined to be non-local Originating Class 5 needs to have the capability to screen the dialed number (GAP) against all NPA NXXs within Class 5 switch’s local/EAS dialing plan Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G ISUP Trunk H I

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 4 Switch IXC Class 5 Switch LNP Database A B LNP Query C LRN D E F Originate call Dialed number is determined to be portable LNP query is launched LRN is returned LRN is determined to be within the LATA Originating Class 5 needs to have the capability to screen the LRN against all NPA NXXs within the LATA Dialed number (GAP) is determined to be non-local Originating Class 5 needs to have the capability to screen the dialed number (GAP) against all NPA NXXs within Class 5 switch’s local/EAS dialing plan Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G ISUP Trunk H I

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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B LNP Query C LRN D E F Originate call Dialed number is determined to be portable LNP query is launched LRN is returned LRN is determined to be within the LATA Originating Class 5 needs to have the capability to screen the LRN against all NPA NXXs within the LATA Dialed number (GAP) is determined to be non-local Originating Class 5 needs to have the capability to screen the dialed number (GAP) against all NPA NXXs within Class 5 switch’s local/EAS dialing plan Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber G ISUP Trunk H I

PSTN Class 5 to IXC to Class 5 – Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber IXC Class 5 Switch LNP Database A B LNP Query C LRN D E F Originate call Dialed number is determined to be portable LNP query is launched LRN is returned LRN is determined not to be within the LATA Originating Class 5 needs to have the capability to screen the LRN against all NPA NXXs within the LATA Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch IXC Class 5 Switch LNP Database A B LNP Query C LRN D E F Originate call Dialed number is determined to be portable LNP query is launched LRN is returned LRN is determined not to be within the LATA Originating Class 5 needs to have the capability to screen the LRN against all NPA NXXs within the LATA Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

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 4 Switch Class 4 Switch IXC Class 5 Switch LNP Database A B LNP Query C LRN D E F Originate call Dialed number is determined to be portable LNP query is launched LRN is returned LRN is determined not to be within the LATA Originating Class 5 needs to have the capability to screen the LRN against all NPA NXXs within the LATA Originating switch determines routing to IXC switch ISUP trunk is set up with terminating Class 5 switch Call is routed to terminating subscriber ISUP Trunk G H

SIP Call Flows

SIP URL: B@Route1, Route 2…
VoIP Non-NNP Ported Number INVITE SIP URL: Route 2… SBC SBC INVITE E.164: B E.164 LRN LRN ROUTES UAS (B2BUA) LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party UAC LSMS NPAC

VoIP NNP Ported Number SBC SBC UAS (B2BUA) LNP DB RS UAC LSMS NPAC
INVITE SIP URL: ADD SBC SBC IP ADD INVITE E.164: B E.164 SIP URL DOMAIN B IP ADD UAS (B2BUA) LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party UAC LSMS NPAC

VoIP Non-Ported Number INVITE SIP URL: Route 2… SBC SBC INVITE E.164: B E.164 NO RESULT E.164 ROUTES UAS (B2BUA) LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party UAC LSMS NPAC

Wireless Call Flows

Wireless Non-NNP Ported Number INVITE SIP URL: Route 2… S-CSCF I-CSCF IP ADD INVITE E.164: B E.164 LRN LRN ROUTES P-CSCF LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party UE (A) LSMS NPAC

Wireless NNP Ported Number
INVITE SIP URL: ADD S-CSCF I-CSCF IP ADD INVITE E.164: B E.164 SIP URL DOMAIN B IP ADD P-CSCF ENUM DNS INVITE E.164: B UE (A) LSMS NPAC

Wireless Non-Ported Number INVITE SIP URL: Route 2… S-CSCF I-CSCF IP ADD INVITE E.164: B E.164 NO RESULT E.164 ROUTES P-CSCF LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider Red: Destination Service Provider Yellow: Third Party UE (A) LSMS NPAC

Pre NNP.

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Pre NNP.

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