Tandem switch migration method
View Patent ↗A tandem switch migration method is provided according to the invention. The tandem switch migration method migrates at least some end users from an old tandem switch of a Public Switched Telephone Network (PSTN) to a new tandem switch using a Local Number Portability (LNP) capability. The method includes configuring a Local Routing Number (LRN) information of the PSTN in order to direct inbound cells from the PSTN through the new tandem switch and to an old node. The method further includes programming routing information of the new tandem switch to direct inbound calls from the PSTN to a new node after at least a portion of end users of the old node have been physically moved from the old node to the new node.
1. A tandem switch migration method to migrate at least some end users from an old tandem switch of a Public Switched Telephone Network (PSTN) to a new tandem switch using a Local Number Portability (LNP) capability, the method comprising:
configuring a Local Routing Number (LRN) information of the PSTN in order to direct inbound calls from the PSTN over a first Time Division Multiplex (TDM) trunk line through the new tandem switch and to an old local service node, wherein SS7 signaling is exchanged between the PSTN and the new tandem switch;
programming routing information of the new tandem switch to direct inbound calls for only a portion of the end users from the PSTN to a new local service node after the portion of the end users of the old local service node have been physically moved from the old local service node to the new local service node; and
configuring the old local service node to route outbound calls through the old tandem switch to the PSTN for remaining end users that have not been physically moved from the old local service node to the new local service node.
2. The method of claim 1 , with the configuring the LRN information comprising configuring LRN information for at least the portion of the end users of the old local service node.
3. The method of claim 1 , with the configuring the LRN information comprising configuring LRN information for all end users of the old local service node.
4. The method of claim 1 , further comprising iteratively performing the configuring and programming steps and moving groupings of end users until all end users are migrated to the new local service node.
5. The method of claim 1 , wherein a second trunk line extending between the new tandem switch and the old local service node comprises a TDM trunk line and wherein SS7 signaling is exchanged between the new tandem switch and the old local service node.
6. The method of claim 1 , wherein a third trunk line extending between the new tandem switch and the new local service node comprises a TDM trunk line and wherein SS7 signaling is exchanged between the new tandem switch and the new local service node.
7. The method of claim 1 , wherein a third trunk line extending between the new tandem switch and the new local service node comprises an IP trunk line and wherein SIP signaling is exchanged between the new tandem switch and the new local service node.
8. The method of claim 1 , wherein the new local service node comprises a Base Transceiver Station (BTS).
9. A tandem switch migration method to migrate at least some end users from an old tandem switch of a Public Switched Telephone Network (PSTN) to a new tandem switch using a Local Number Portability (LNP) capability, the method comprising:
configuring a Local Routing Number (LRN) information of the PSTN in order to direct inbound calls from the PSTN over a first Time Division Multiplex (TDM) trunk line through the new tandem switch and over a second TDM trunk line from the new tandem switch to an old local service node, wherein Signaling System 7 (SS7) signaling is exchanged between the PSTN and the new tandem switch and between the new tandem switch and the old local service node;
programming routing information of the new tandem switch to direct inbound calls for only a portion of the end users from the PSTN to a new local service node after the portion of end users of the old local service node have been physically moved from the old local service node to the new local service node; and
configuring the old local service node to route outbound calls through the old tandem switch to the PSTN for remaining end users that have not been physically moved from the old local service node to the new local service node.
10. The method of claim 9 , with the configuring the LRN information comprising configuring LRN information for at least the portion of the end users of the old local service node.
11. The method of claim 9 , with the configuring the LRN information comprising configuring LRN information for all end users of the old local service node.
12. The method of claim 9 , further comprising iteratively performing the configuring and programming steps and moving groupings of end users until all end users are migrated to the new local service node.
13. A tandem switch migration method to migrate at least some end users from an old tandem switch of a Public Switched Telephone Network (PSTN) to a new tandem switch using a Local Number Portability (LNP) capability, the method comprising:
configuring a Local Routing Number (LRN) information of the PSTN in order to direct inbound calls from the PSTN over a first Time Division Multiplex (TDM) trunk line through the new tandem switch and over a second trunk line to an old local service node, wherein Signaling System 7 (SS7) signaling is exchanged between the PSTN and the new tandem switch, wherein second trunk line an Internet Protocol (IP) trunk line, and wherein Session Initiation Protocol (SIP) signaling is exchanged between the new tandem switch and the old local service node;
programming routing information of the new tandem switch to direct inbound calls for only a portion of the end users from the PSTN to a new local service node after the portion of end users of the old local service node have been physically moved from the old local service node to the new local service node; and
configuring the old local service node to route outbound calls through the old tandem switch to the PSTN for remaining end users that have not been physically moved from the old local service node to the new local service node.
14. The method of claim 13 , with the configuring the LRN information comprising configuring LRN information for at least the portion of the end users of the old local service node.
15. The method of claim 13 , with the configuring the LRN information comprising configuring LRN information for all end users of the old local service node.
16. The method of claim 13 , further comprising iteratively performing the configuring and programming steps and moving groupings of end users until all end users are migrated to the new local service node.
17. The method of claim 13 , wherein a third trunk line extending between the new tandem switch and the old local service node comprises a TDM trunk line and wherein SS7 signaling is exchanged between the new tandem switch and the old local service node.
18. The method of claim 13 , wherein the new local service node comprises a Base Transceiver Station (BTS).