Telephone Systems - Choose What Fits You

All of the major urban centers in progressive countries use the most modern communication facilities to connect them to people around the world. All of these telephone systems are dependent on their use of the latest components and technologies collated by the latest software.

Today, this communication matrix are all in use for business and commerce, medicine, news, entertainment, labor, politics and maybe all the other human aspects that need communications. The surprise is that science and engineering had been able to synchronize and let work together the mix of the old and the new systems.

There are now several network system types at work at any place.

PBX

This acts as a switch in switching calls in telephony or circuit switched networks. This older system cannot pass IP packets and is now being replaced with IP PBXs. The IP PBX supports the IP protocol in connecting the phones and is much easier to administer because they use an Internet browser or some other IP-based utility.

The system is favored by most medium and large-sized companies where the users share a certain number of outside lines which enable calls considered external to the PBX. This type is less expensive than getting each user to use a dedicated external line.

Internal and external calls

Phone sets, fax machines, modems, and other communications devices can be connected to PBX. The trunk lines are used for making and receiving calls external to the business like PSTN. The internal calls within the same system are switched by the PBX.

Trunk lines (outside lines) are used for making and receiving calls external to the business, like the PSTN. Internal business calls made to external lines are done by dialing 9 or 0 in some systems followed by the number. Internal calls within the same system are switched by the PBX.

Circuit-switched networks

PSTN (Public Switch Telephone Network) is a circuit-switched network and can have multiple calls sent across the same medium. It is a network of dedicated connections where two nodes can communicate.

It uses two types, analog and digital. The analog is for voice transmission, although PSTN has now transitioned to digital these days. Circuit switching has the full circuit, unlike the packet switching. It is possible to be inefficient because bandwidth is wasted.

Packet-switched networks

The system basically divides the message into several packets of smaller units. These are sent out and are reassembled at the receiving point.  With this type of network, like the Internet, packets are routed to their destinations in individual nodes on data links shared by other nodes.

Packet-switched networks have their data communications enabled on the Internet. (This is the data counterpart of PSTN). The system makes all the data networks widespread.

The SIP-enabled PBXs acts as the networking switch in calling circuit-switched networks or phone systems. SIP differs from regular PBX because it can connect to the Internet using SIP protocols in making calls.

The Voice over Internet Protocol (VoIP) has both software and hardware that enable call transmissions. These are also sent in packets using IP instead of traditional transmissions. These days, choices on telephone systems Melbourne are feasible.