The systems that you are probably using these days might belong to an older technology. If you want to use updated technology, use the new VoIP phone systems, which are a modernized version of your primitive analog system, which you might be using now.
You might be aware of the key telephone systems, which were a hit in the business world earlier. They use individual lines and stations and connect PSTN lines and stations. The telephones are also designated with individual telephone extension numbers on a PSTN network. This constitutes a hybrid key telephone system.
The hybrid key telephone system is further modernized over by deriving the energy out of Ethernet and then interconnecting it through internet that a new system is developed called VoIP networking system. The VoIP works on technologies which allow transmitting of Voice though IP telephone devices. Instead of PSTN network it uses internet or IP network.
The types of VoIP you may come across
VoIP phones could be either hardware devices that look like ordinary telephones or cordless phones. They use an additional analog telephone adapter for the communication to take place through them. The cable interfaces used here are computer networks and separate IP phones, which are connected through Ethernet or USB.
Power over Ethernet are the PBX replacement applications, which are largely used because of the various advantages such as, more flexibility, single connector and effective cables types offered by this type. A VoIP phone or application features e-mail like IDs for contact which are not featured by analog phones. Features of VoIP are generally similar to those offered by SKYPE, GOOGLE VOICE, and other PC-based phone services. These also have richer features.
Which other devices support VoIP and make your task easier
Other phones such as iPhone, Android, and the QNX OS and the later used BlackBerry phones are all capable of VoIP performances as they support USB. Nowadays Smartphone becomes the dominant VoIP phone because it works both indoors and outdoors, whereas, PoE becomes thus more of a transitional device.
Components offered to you by the VoIP phone systems and VoIP devices
Components such as physical hardware, DNS client, STUN client, DHCP client RTP client and codecs are all features offered by the software. STUN or Session Traversal Utilities for NAT client is based largely on VoIP and firewalls. These require a special mechanism to enable routing of SIP packets from one network to other.
A hosted VoIP will thus consist of each of these facilities and offer you the best of the telephone systems to start your official work with. PBX phone system is the phone line through, which all such VoIP phone systems are connected and constitute a hosted VoIP phone system.
Choose VoIP over the earlier used digital or analog phone systems for a better sound quality, good sharing experience, cost effective business and for a better experience. PBX systems and the USB thus, reduce the cost by many times for your business to provide you with a durable phone system.