3. The standard defines the procedures and protocol by which network elements in the public switched telephone network (PSTN) exchange information over a digital signaling network to effect wireless (cellular) and wireline call setup, routing and control.

5. wireless services such as personal communications services (PCS), wireless roaming, and mobile subscriber authentication

6. local number portability (LNP)

7. toll-free (800/888) and toll (900) wireline services

8. enhanced call features such as call forwarding, calling party name/number display, and three-way calling

10. more efficient use of voice circuits

11. support for Intelligent Network (IN) services which require signaling to network elements without voice trunks (e.g., database systems)

13. STP’s route network traffice between signaling points (ie acts like a network hub)

15. All nodes are interconnected via F-links

16. Reliable network configuration due to diversity

17. Signalling links are directly associated with the voice links

18. As the network expanses growth is complex to manage

19. Link growth

20. Services deployment

23. SS7 traffic is carried separately from voice traffic

24. STP acts as a gateway providing network protection

25. STPs are mated pairs using C-links

26. Pairs are interconnected via B/D-link quad

27. Architecture provides redundancy

28. Hierarchical design that simplifies changes

31. Using layers to separate networks

32. Access is only granted a key locations

33. Backbone network allows for service to be offered across boundaries.

44. Ensure message are transmitted accurately end to end, in sequence

50. ISUP (ETSI, ANSI), xTUP

51. Call control part of the protocol

52. The ISDN User Part (ISUP) defines the protocol and procedures used to set-up, manage, and release trunk circuits that carry voice and data calls over the public switched telephone network (PSTN). ISUP is used for both ISDN and non-ISDN calls.

53. TCAP

54. Transfer non-circuit related information

55. Supports database queries and responses between SSPs and SCPs

59. Providing the links between the STPs are a combined linkset the messages are loadshared across the links.

61. STP A notifies it associated links (Directly connected links) to not send message to the SSP if another path is available - Restricted

62. All messages are now sent from SSP (0-1-0) through STP C to STP B.

64. All messages are now sent from SSP (0-1-0) through STP C to STP A to STP B - C link routing

66. STP A and B notifies all nodes (associated and quasi-associated) to not send message to the SSP - Prohibited

71. Option 2:

72. Partitioning in the STP Multiple PCs per NI

73. Links are required between 2 nodes for each Network Indicator (NI).

76. Cost effective, Low Power/Real estate requirements

77. SCP/Boundary Gateway solutions - LNP, Mediation, etc.

78. Universal NP Master: Third generation number portability solution based on the Signaling Server Platform Technology

79. Scalable, flexible implementation, proven LSMS

81. Universal Mediation Platform - Adds ability to control requests from another operator’s networks. Guards against inappropriate and/or illegal use of host network and services. Screens ISUP and TCAP messages and their content.