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Carrier Network Services


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    August 2018
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Broadband and Wide Area Network Services Carrier Gigabit Ethernet Multi Protocol Label Switching Vs. IP VPNs T-1 & T-3 SIP Trunks Security Network Topology Backup Services Managed Services Carrier Network Services Remote worker Branch office Branch office Internet Your home PSTN (Public switched telephone network) Headquarters Connections to Carriers’ Networks Legacy TDM Voice network Carrier DACS Customer Premise ! " #$%&' Switch Internet TDM Voice PBX Connections to Carriers’ Networks VoIP to customer network Customer Premise Carrier IP Voice/Data network ! " #$%&' Switch Customer IP PBX Carrier Gigabit Ethernet  Site to site links in metro areas  Internet access  Flexibility  Speeds  Scalable capacity  Fiber  Same protocol as LANs  Over copper  Slower speeds  Not available everywhere  Not suitable for traditional voice Overview of an MPLS Network High-speed core routers MPLS Network Edge routers attach labels to customers’ packets • Edge routers connected directly to customers • core routers connected only to other routers Access Lines provide service connections (TDM =T1, T3, SONET; IP = DSL, Ethernet) and the Can be on same circuit to carrier’s network Internet Access lines Customer premises router LAN switch VoIP phone IP VPNs – Using the Public Internet • Sending traffic over the public Internet – Encrypted • • • • Cost savings Site to site Telecommuters Remote salespeople Secure Remote Access to MPLS or IP VPNs Secure tunnel over broadband, Internet, & MPLS Internet Secure tunnel over high-speed access line MPLS NETWORK Telecommuter Headquarters' LAN Telecommuter’s laptop and headquarters have matching security tunneling protocols surrounding data. T-1/T-3 Time Division Multiplexing What are the pros and cons of T-1/T-3 service? Each device assigned a time slot 1 24 or 32 channels T-1 Mux 2 3 4……..24 24 or 32channels T-1 Mux T-1 - Fiber, copper or wireless, 24 channels E-1 - Fiber, copper or wireless, 32channels T-3 – Fiber or wireless; 672 channels E-3 – Fiber or wireless: 480 channels Session Initiation Protocol (SIP) Trunking • A standardized signaling protocol in IP networks – Used to connect carriers to each other – Connects enterprise VoIP PBXs to carrier’s circuits • Used on the Internet • In VoIP PBXs – Trunks connected to the Internet – Combine VoIP and data • Different implementations by PBX manufacturers and carriers How do we Choose Carrier Services? • Each group should explain the service assigned to their group by answering the questions below. – T-1 - Group 1 – T3 – Group 2 – Carrier Gigabit Ethernet – Groups 3 and 4 • • Let us know the size of organization that would use it (small, medium, large) For your service let us know: – – – – – – – Its speed Multiplexers or switch needed to support it Ability to increase capacity (scale) Ability to shrink capacity if the company decreases in size Does it support voice, data, and video? Media it operates on Disadvantages of this service Hub and Spoke Topology Gigabit Ethernet Seattle Internet Los Angeles Wide area network Centralized applications at headquarters T-1 at smaller sites Houston Miami Outside Cable Reliability • • What can go wrong in broadband links? Back-up plans in the event of cable cuts or other carrier outages: • What are affordable options for small organizations? WiMAX tower PSTN Cell tower Internet Verizon equipment AT&T equipment Carriers’ Managed Services For a fee (naturally) carriers will manage: Routers T-1/T-3 multiplexers Ethernet switches The data center Security Remote access MPLS Quality of service Latency Wireless devices Call center consulting Back-up Staffing productivity Summary • • • • • • • • • • T-1/E1 T3/E3 Gigabit Ethernet MPLS IP VPNs SIP trunking Vulnerability to cable cuts and other outages Security Topology Managed services