Carriers and Interconnect

Carriers and Interconnect

To allow communications between customers of different carriers, the carriers must implement physical connections between their networks.  In this module, you’ll learn how the Internet is actually implemented, with peering and transit agreements at Internet Exchange buildings.


You will also learn about POPs in toll centers: how and where local exchange service providers: ILEC, mobile providers and CATV connect together and to other carriers for phone calls with a PSTN phone number; and SS7 to set up the calls.  


We’ll finish by understanding where a CLEC fits into the picture with equipment collocated in wire centers.


Telecom Module 11

Detailed Outline

11 Carriers and Interconnect

11.1 IX: Internet Exchange - Interconnect for Internet Traffic

...... 11.1.1  Fiber to an AS

...... 11.1.2  Transit

...... 11.1.3  Peering

11.2 Telephone Network Architecture

...... 11.2.1  Access Network

...... 11.2.2  Switching Network

...... 11.2.3  Transmission Network

11.3 PSTN Switching Centers, COs and Toll Centers

...... 11.3.1  Class 5: Central Office

...... 11.3.2  Wire Center

...... 11.3.3  Local Calls

...... 11.3.4  Class 4: Toll Center

...... 11.3.5  Class 1, 2 and 3 Switching Centers

...... 11.3.6  High Usage Trunks

11.4 Implementing Competition: LECs, POPs and IXCs

...... 11.4.1  LECs, ILECs and CLECs

...... 11.4.2  Inter-Exchange Carriers: IXCs

...... 11.4.3  POP: Point of Presence

...... 11.4.4  Switched Access

...... 11.4.5  Equal Access and PIC Codes

11.5 Wireless and CATV Local Exchange Carriers

11.6 CLEC: Collocations and Dark Fiber

...... 11.6.1  Unbundling

...... 11.6.2  Dark Fiber and Dry Copper

...... 11.6.3  Competitive Local Exchange Carrier (CLEC)

...... 11.6.4  Collocations

...... 11.6.5  Advantages

...... 11.6.6  Disadvantages

...... 11.6.7  Application

11.7 SS7

...... 11.7.1  Carrier Interconnect

...... 11.7.2  Call Setup

...... 11.7.3  Out-Of-Band Signaling

...... 11.7.4  Service Control Points and Service Switching Points

...... 11.7.5  Advanced Intelligent Network (AIN)

...... 11.7.6  Switch-Based Call Routing

...... 11.7.7  SS7 In Practice

...... 11.7.8  Residential Service Application Example

...... 11.7.9  Business Service Application Example