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Understanding Technology Nodes in Network Communication: PSTN, Cellular, and Gateways

This article explores the various technology nodes integral to communication networks, including the Public Switched Telephone Network (PSTN), cellular systems, and private branch exchanges (PABX). Key components like Home Location Registers (HLR), Signaling Transfer Points (STP), and Service Control Points (SCP) are discussed, with insights into their function and significance in call flows. The interconnectivity of these systems allows for seamless communication across multiple platforms, exemplified by real-world scenarios and numbers utilized in cellular and international communications.

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Understanding Technology Nodes in Network Communication: PSTN, Cellular, and Gateways

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  1. ...the rest is Technology

  2. Nodes in a Network • PSTN, Public Switched Telephone Network • Cellular, from the cellular radio structure • HLR, Home Location Register - Database • PABX, Private Branch eXchange • Gateways/Transits - Node to Node Switch • e.g. International Gateways (MCI&MFS) • STP, Signaling Transfer Point - Control • SCP, Service Control Point - Database

  3. Call flows, examples • 1. PSTN - PSTN • 2. PSTN - Cellular (PCS or AMPS) • 3. Cellular (PCS) - Cellular (AMPS) • 4. Cellular - PABX (Regular number) • 5. Cellular - PABX (800) • 6. Cellular - International

  4. PSTN - PSTN 578 => 578 5626 5626 => 578 5626

  5. PSTN - Cellular Where? 673 => 673 4831 => <= Location! ID your phone 673 4831

  6. Cellular (PCS) - Cellular (AMPS) Where? 673 => 673 4831 => <= Location! 673 4831 ID your phone

  7. Cellular - PABX (Regular #) 705 7 => 705 => PABX 5 7769 => 705 7769

  8. PABX Cellular - PABX (800 #) 222 9293 => 222 9293 = 214 997 1243 1 800 222 => <= 214 997 1243 997 1243 => 997 => 7 1243 => 1 800 222 9293

  9. Cellular - International 011 46 => 8 757 => 011 46 => 0000 => 011 46 8 757 0000

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