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Competitive Public Switched Telephone Network (PSTN) Wide-Area Network (WAN) Access Using Signaling System 7 (SS7)
PDF of this tutorial5. Getting CLECs and ISPs onto SS7–Based WANs
CLECs/ISPs are motivated to provide connectivity for existing access server infrastructure to the WAN with SS7 because of the following:
- CLECs and ISPs can remove ISP traffic from the end-office switch and eliminate the busy-signal problem.
- CLECs can receive termination reciprocal end office revenue from the ILEC by using SS7 vs. local line switching services provided by the ILEC.
- Performance will improve with a reduction in call setup time by several seconds per call vs. channelized in-band signaling.
- CLECs can offer PRI services in markets currently not supporting PRI.
- ISPs can support multichannel, multipoint-to-point protocol (PPP) calls from their customers vs. channelized dial-up access only.
- CLEC and ISP access charges are reduced with SS7 and IOF facilities vs. PRI facilities.
- They can maintain payout from the existing infrastructure investment costs.
