VoIP phone calls are usually delivered over a carefully-managed network often running Quality of Service (QoS) and the Session Initiation Protocol (SIP).

A T1 local access connection to the Internet that can be configured to carry either 24 digitized data channels or one aggregated concatenated data channel at a rate of 1.544 Megabits Per Second (Mbps) that is connected via a T1 Wan Interface Card (WIC), Channel Service Unit / Data Service Unit (CSU/DSU), and Internet router.

Many VoIP service providers guarantee that phone calls will not travel over the public Internet, but are converted and transmitted over the traditional telephone network directly from the VoIP provider's private Internet network that usually adheres to a defined Quality of Service (QoS).

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MPLS VPNs use Multiprotocol Label Switching (MPLS) to set up Virtual Private Networks (VPNs) that can isolate data traffic to provide Class of Service (CoS), Quality of Service (QoS), and ease network administration with minimal network overhead. Layer 3 MPLS VPNs (L3VPNs) use BGP, traffic isolation and Virtual Routing / Forwarding (VRF) for network routing and security. MPLS VPNs are more efficient and robust than IPSec VPN, ATM, MPLS L3VPNs.

A major feature of Internet over Ethernet is the ease in which you can upgrade from 1 Mbps to 1 Gbps. Simply call your Internet Service Provider (ISP) and ask for an upgrade and it can be provisioned almost in real time. This service is the future of Internet access for the foreseable future.

DSL has become a widely-accepted and increasingly reliable method of delivering phone service and providing Internet access that saves end users money because both voice and data are delivered across the same plain old telephone serivce (POTS) line. However, the distance to the local phone company central office where the copper POTS line is connected from the customer premise to the DSLAM will determine the potential speed of the DSL connection.

Exlpore why Ethernet is probably the next killer broadband delivery platform.

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MPLS can be used to create highly-scalable IP networks with layer 2 level security as well as easy network configuration, management, and provisioning.