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

An Internet T1 (also spelled Internet T-1) is a high-speed digitally transmitted connection to the Internet that transfers signals at 1.544 Mbps (1,544,000 bits per second) that can be divided into twenty-four 64 Kbps telephone lines or trunks.

Hosted Voice over Internet Protocol (VoIP) is a voice and data technology that supports several telecommunications protocols, such as Session Initiation Protocol (SIP) and Internet Protocol (IP), that that makes it easy for people to use the Internet to make telephone calls while saving money on premise hardware.

The ADSL downstream receiving rate from the Internet usually varies from 1.5 to 9Mbps while the upstream sending rate usually varies from 16 to 640 Kbps.

The main limitation on DSL bandwidth speed is the distance from the customer premise to the local telephone company central office.

Multiprotocol Label Switching (MPLS) is a data communication standard that creates separate data paths for specific sequences of packets. Each packet is identified by a label that is encapsulated into each packet. This eliminates the need for Internet Protocol (IP) routers to look up the IP address of the next router in the network in order to forward the packet and as a result, speeds up the network.

Internet access via Ethernet is becoming more and more popular to meet the growing demand for dynamic high bandwidth increases. For example, an increase from 10 to 100 Mbps can be accomplished by a High Speed Internet over Ethernet provider by simple changing the settings on already installed Ethernet switches. This scalability is cost effective for customers in that bandwidth can be increased or decreased quickly and easily, on demand, without the necessity of adding or changing datacom equipment as would be required with T1 / T3 or E1 / E3 local access lines.

POTS local loop speed is increased by up to 50 times when a DSL modem is attached at the customer premise and a Digital Subscriber Line Access Multiplexer (DSLAM) is connected to the local access loop at the local telephone company central office (CO).

Telecom Links reveals the secrets of telecom technology from the first radio to the latest fiber optic technologies.

If you are looking for clear, concise definitions of telecommunication terms and explanations of telecom services, especially how they are used and how they work, TelecomLInks is a great place to start.

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