Internet Trunking Introduction
Internet Trunking is a form of connection where multiple IP phones are connected to one WAN router. The routers are specially designed to accept and forward packets from internet source ports like the Internet and send them to a designated destination. This forwarding process is done at great speed since there are only a few data fields to route through. There are two ways in which Internet Trunking works, namely:
Type I: This is the most basic kind of Internet Trunking and the first method used. This is usually referred to as ‘local area network’ or LAN. In this case, the Internet is first accessed through the source port of one’s computer. The WAN router then organizes and fragments the incoming data field so that it can be forwarded to the necessary destination. This type of Internet Trunking has been deployed within small and medium sized businesses since it provides inexpensive and effective means of communication.
Type II: As the name suggests, type II trunks consist of an independent network which is not connected to any other network. A single itp packet may traverse from one itp source IP to another itp packet destination in the network. The number of its possible routes will depend on the Length of the itp packet. These networks are commonly used within huge companies since they offer high-speed and flexible means of communication.
The advantage of this type of internet trunking protocol is that there are limited or no restrictions on how many IP phones can connect to a single WAN router. This makes this type of internet trunking protocol very useful for businesses that need to establish private interconnections among employees. Another good thing about using this kind of internet connection is that it uses the same port number for all the phones which allows several calls to be simultaneously made between internet phones. The only drawback is that there may be delays in data transmission as a result of multiple calls.
Types I and II: The purpose of this internet trunking protocol is to link two or more IP networks. The first network that is used as an interface to the internet trunking network is called the iptv network. The next is called the trunking network. Each of these three types is used to provide the necessary connection to the internet and to transfer the requested internet protocol packet is received at a node.
The example IP packet shown above, is an illustration of how the next itp node receives and delivers a request for data. In order to complete the transaction, it must obtain an IP packet from the main line before completing the transfer. Once the transfer is completed, it will place the requested IP packet into the next IP network. In the example above, the next itp node is a third party that is located at a different location. It will forward the requested data to the main and return the IP packet that has been initially received at the other end. As previously stated, all three of these types are necessary to provide the internet connection.
Types III and IV: In addition to the types I and II, there are also other types of itp packets. The first one is the SBC or subscriber block encapsulated block encapsulation. This type of IP packet length is required to protect sensitive information contained in IP packets. In addition, it also has a higher overhead than other types of itp packets. The SBC type has a minimum of 3.4 seconds to get the IP packet from point A to point B and there is a minimum of 4.5 seconds for data to travel between satellite hops.
The IV or ingress packet traverses the network first. At every hop along the way, the IP data field will change according to the latest negotiated session. For instance, during the course of a normal Internet session, the itp source IP address field will change from zero to seven. Once the data field changes, the IP packet may have to transition to the destination system where it will be received before it can complete its journey to the IP source of the next hop.