PDF of this tutorialSS7 is a cost-effective option for service providers that reduces access costs and possibly allows CLECs to receive reciprocal termination revenue from the ILECs. This is made possible when CLECs use ILEC trunk facilities instead of the end switch office's local switching services. CLECs can then also provide advanced database features such as advanced intelligent network (AIN), 800/888, line information database (LIDB), and other ILEC database services.
SS7 enables CLECs to avoid subscriber-based measured-per-minute call charges and primary rate ISDN (PRI) access charges. One SS7 connection can service multiple trunks, resulting in additional cost savings as the CLEC adds capacity. CLECs can offer PRI service in new markets and where ILECs do not currently offer PRI services. Virtual services within the CLEC/ILEC locations can be enhanced by per-port offerings to ISPs, enabling these ISPs to avoid buying the network equipment.
Using complementary conversion equipment to interface to the SS7 network on one side and PRI ports on the access side, ISPs who become CLECs can now retain their equipment investment in remote access servers. ISPs/CLECs in non–PRI markets can access SS7 for advanced services and improved network performance such as reduced call setup delays. They can also offer PRI services to their customers as a competitive advantage.
