VoIP or Voice Over IP, the latest wireless communication works by dialing phone calls, from analog to digital signals, and transmitting signals over IP or broadband, and finally through a PSTN. Call charges can be significantly reduced with this technology. The advantage is that your phone emulation software can be loaded on your laptop so you can make your services even while traveling.

VoIP uses peer-to-peer technology using Session Initiation Protocol (SIP) technology, which allows computers to communicate with each other without diverting calls from the central station. Hence, calling from one SIP-enabled phone to another will dramatically reduce call charges.

The Asterisk system comes with an Asterisk server that handles teleconferencing, voicemail, rows, and music. A hard phone is a digital phone that communicates with the server through an Ethernet connection using the SIP protocol. These, including the wireless version, are not too expensive. The soft phone is installed in software and can be connected to the computer. Asterisk runs primarily on Linux, an open source operating system.

Cisco offers phone solutions that are network-based and running on a router. They can be scalable and work well in multiple user environments in multiple locations. The UC500 pack includes a range of features such as routers, switches, security, telephony, and wireless features in a single device. This greatly reduces costs for a company that plans these services. With Cisco CallManager Express SIP, you connect your phones over the Internet and have UC 500 features, making it more viable for medium-sized businesses. Additional features include pager, intercom, ICMP, and a set of restrictions between user calls.

Avaya IP Office uses IP technology for voice and data communications, messaging, and client management with multiple locations, 2-300 people. Allows you to work from anywhere, receive conferences, integrate apps, scale and improve customer satisfaction at the touch of a button. Cost-effective as it reduces long distance calls, conference fees, supports remote workers, and helps keep your business up to date and up-to-date.

The three products are comparable based on the following criteria:

• Number of extensions: Asterix supports up to 100 extensions, while Cisco and Avaya can add up to 360 extensions, thus supporting large organizations. This improves scalability and reduces costs in the long run.

• Freeware: Asterisk runs free and runs on a Linux server. So the phone solution is cheaper than Cisco or Avaya, which are widely used by routers and switches for communication.

• Installation and Maintenance: Asterisk is the programmer's dream because it is open source and can be changed. However, for end-users it may be a nightmare. Support and services are better with Cisco and Avaya, which are trademarks in the industry.

For Asterisk, the most important thing is the cost. However, it is not always advisable to examine the initial cost of things. Other criteria such as scalability, integration of a device with existing ones, interoperability, and long-term costing should take into account the choice of one product to another

Source by Scott Camball

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