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PC Phone call also as known as PC to Phone Call is the way to place and receive phone calls using your computer and Internet connection with a computer software called softphone. Basically, softphone enables making telephone calls over the Internet using a general purpose PC or laptop, rather than using dedicated hardware using VoIP or Voice over IP technology.
Softphone is designed to behave like a traditional telephone, appearing as an image of a phone, with a display panel and buttons with which the user can interact. Softphone is usually used with a headset connected to the PC or laptop .
VoIP stands for Voice over Internet Protocol and is a technical way of saying "using the Internet for making telephone calls." VoIP technology with PC Phone service converts regular (or analog) phone calls into data (or digital) and zips them through your high-speed Internet connection.
A softphone is used to make calls via an Internet telephony service provider to other softphones or to telephones and while service providers may offer PC-to-PC calls for free; PC-to-phone and phone-to-PC calls and PC-to-Mobile calls are usually not free.
Another application of softphone is connecting it to a private branch exchange (PBX) or IP PBX through a local area network (LAN) and is used to control and dial through an existing hardware phone.
This type of softphone is used mostly on a call center environment to make calls from a central customer directory, and to show information on the screen about which customer is calling, instantly providing the operator with details of the relationship between the caller and the company using the call center.
It's important to differentiate softphones from services based on softphones. Skype, Vonage and Google Talk are Internet telephone service providers having their own softphones that you install on your computer but these providers are not interoperable, and you can't place a direct call between them since they all use proprietary communication protocols.
In order softphones to communicate, both end-points must have the same communication protocol and at least one common audio codec. Most service providers as well as PCPhonex use a communication protocol called SIP (Session Initiation Protocol) by IETF
PCPhonex SIP PC Phone service can turn any PC or laptop into a full-functioning telephone.
Simply downloading softphone or PC to Phone computer software to your laptop, PC and within 5 minutes you can make PC Calls to any phone from any high-speed / WiFi location on the world just using a headset with a microphone.
Some of the Computer Softwares or Softphones used for PC to Phone Calls are as follows;
X-Lite from Counterpath is world's most popular, free SIP softphone supporting a range of codecs and all the features you need in a perfect SIP softphone with great support for desktop video conferencing.
Eyebeam is a upgraded version of X-lite including multiple SIP accounts and G729 codec for better voice quality.
Zoiper is another free softphone that features support for both SIP and IAX, and includes free and paid versions of their software.
Ekiga (formerly called GnomeMeeting) is a VoIP and video conferencing application a Linux Softphone for GNOME and Windows which is distributed as free software under the terms of the GNU General Public License.
SJphone is a VOIP softphone that allows you to speak with any other softphone running on a PC or using Internet Telephony Service Provider (ITSP) with any traditional wired or mobile phone for PC to mobile calls.
All of these softphone has all standard telephony features (DND, Mute, DTMF, Flash, Hold, Transfer etc) and some have advanced features such as Presence, Video, Wide band Audio and more. The codecs used with free softphones to make PC Phone calls are G.711, GSM and iLBC and with paid ones you can also use G729 codec.
In order to make voice calls over Internet with a softphone, you should have
any modern PC or laptop with a microphone and a speaker, or with a headset, or with USB phone a reliable Internet connectivity like DSL, WiFi, cable, fiber, LAN or 3G and a PC Phone account with an Internet telephone service provider PCPhonex.