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Signaling System 7 - SS7
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SS7 Extended Link E-LinkAn extended link is a communication line or path that connects an SSP to an alternate STP. E-links provide an alternate signaling path to an SSP's "home" network in the event that an STP cannot be reached via an A-link. E-links may not be included or used unless the increased reliability benefit justifies the added expense.
SS7 Signaling Link Types
This figure shows the relationship between the link names and the link location (type). Signaling links are logically organized by link type ("A" through "F") according to their use in the SS7 signaling network. The "A" (access) links connect the signaling end points (e.g., an SCP or SSP) to the STPs. Only messages originating from or destined to the signaling end point are transmitted on an "A" link. The "B" (bridge) links connect the STP to another STP. The "C" (cross) link connects STPs performing identical functions into a mated pair. "D" (diagonal) links connect the secondary (e.g., local or regional) STP pair to a primary (e.g., inter-network gateway) STP pair in a quad-link configuration. "E" (extended) links connect the SSP to an alternate STP. An "F" (fully associated) link is connected between two signaling end points (i.e., SSPs and SCPs).
SS7 Books
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Signaling System 7 - SS7
This book explains the operation of the Signaling System 7, and how it controls and interacts with public telephone networks and VoIP systems. SS7 is the standard communication system that is used to control public telephone networks. In addition to voice control, SS7 technology now offers advanced intelligent network features. $34.99 Printed, $29.99 eBook |
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