Tag - Software Application

What is Softphone?

A softphone is a phone that allows you to talk using VoIP without necessarily having a physical phone set.

A softphone is a software application that permits you to make IP-based telephone calls from an Internet-connected computer. It doesn’t require any dedicated hardware, such as a phone or cable wire, but typically is used with a headset or a USB-connected phone. Using a softphone requires having a computer with a soundcard, an Internet connection and a subscription with a softphone service provider.
it is a piece of software, or part of a VoIP software, that acts as an interface allowing you to dial numbers and carry out other phone functions using a screen (that of your computer or PDA) and your mouse, keyboard or keypad.

Commonly, the interface resembles a phone with buttons representing the keys, which you press using the mouse to dial. An example is the Skype softphone.

For speaking and listening, a headset and microphone suffice. You can also use an IP phone or handset, if you have one.

 Basic Softphone Features

  • The simplest softphones feature a dialing pad, a display field, an accept-call button, and end-call button. Some basic softphones also offer speed dialing and an integrated address book.

Advanced Softphone Features

  • Advanced softphone features include caller ID, three-way conferencing calls, anonymous call blocking, 411 directory assistance, area code selection, voice mail, callback, do not disturb and silent monitoring. It’s like using an analog phone receiver with an answering machine. Similar to conventional phones, you must pay an extra subscription fee to use many of these functions


High-end Softphone Features

  • The best softphones can work alongside a webcam so that you can engage in a video chat with another softphone user. There’s also a voice-mail extension so callers can leave a message for a particular employee or extension. In addition, an auto attendant feature plays music for customers who are put on hold. And with the Find Me, Follow Me (FMFM) softphone feature, employees can move to different stations and still receive calls.

Landline-Capable Softphones

  • Some softphones can dial landline telephones by using an advanced form of the Voice over Internet Protocol (VoIP). Using a softphone such as Skype, for instance, you can call someone from another state or country. Such calls still carry a premium, but the premiums are generally cheaper than the prices associated with conventional overseas phone calls.

Other Features

  • Softphones come in many sizes and shapes and serve a variety of functions. They aren’t restricted to desktop computers anymore. Softphones can be used on laptops and even 3G- and 4G-connected cellphones. There is a softphone for everything, regardless of whether you want to just make simple PC-to-PC phone calls, start a conference call or even make a PC-to-landline phone call.

Ref: http://www.ehow.com/info_8340318_softphone-features.html

Application Layer

Application Layer enable the user, whether human or software, to access the network. It provides user interfaces and support for services such as electronic mail,file access and transfer, access to system resource, surfing the world wide web, and network management.

Application layer is Responsible for Providing Services to the user.

  • Application Layer is a term used in categorizing protocols and methods in architectural models of computer networking. Both the OSI model and the Internet Protocol Suite (TCP/IP) define application layers.
  • In TCP/IP, the Application Layer contains all protocols and methods that fall into the realm of process-to-process communications via an Internet Protocol (IP) network using the Transport Layer protocols to establish underlying host-to-host connections.
  • Provides a means for the user to access information on the network through an application. This layer is the main interface for the user to interact with the application and therefore the network.
  • The application layer is the OSI layer closest to the end user, which means that both the OSI application layer and the user interact directly with the software application. This layer interacts with software applications that implement a communicating component. Such application programs fall outside the scope of the OSI model. Application layer functions typically include identifying communication partners, determining resource availability, and synchronizing communication. When identifying communication partners, the application layer determines the identity and availability of communication partners for an application with data to transmit. When determining resource availability, the application layer must decide whether sufficient network resources for the requested communication exist. In synchronizing communication, all communication between applications requires cooperation that is managed by the application layer.


Some examples of application layer implementations include Telnet, File Transfer Protocol (FTP), and Simple Mail Transfer Protocol (SMTP).

                                                                                                OSI  Model


  • Application Layer do¬†Interaction (Providing Services to the user)
  • 80% Application on internet do interact
  • i.e ¬†google.com —–> will auto —–> ¬†www.google.com ——> Here www intract ¬†on port 80
  • i.e ¬†for buy house property dealer do interact

Application Layer Protocols

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