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Technology (cont.)

What is SIP?

Session Initiation Protocol (SIP) is a call control protocol that establishes and terminates "media sessions." Examples of media sessions include phone calls, e-mail, streamed video, and instant messaging. SIP standardizes these communications by adding a protocol that is independent of the underlying network and infrastructure. It is not dependent on ports, pipes, hardware or software, but allows all of these components to talk with each other and media to be controlled independently from the network.

SIP is the packet voice protocol of choice by major IP voice initiatives such as the G3 wireless consortium and Microsoft. A highly flexible protocol, SIP specifies the basic and supplementary services to create, modify, and delete these multimedia sessions or calls. By utilizing SIP, we enable customers to use applications regardless of the client's network or access type.

SIP's foundation in HTTP allows it to integrate with Web, e-mail, and other data applications using a URL format, providing a highly flexible protocol. SIP's ease of use and flexibility pave the way for new services and capabilities in the future.

What is IP Trunking?

IP Trunking allows businesses with IP PBXs to extend the benefits of Voice over IP (VoIP) convergence from their LAN to the WAN and the Public Switched Telephone Network (PSTN).  It eliminates the need for expensive TDM gateways and trunks, helps to increase network efficiencies and cost-savings by converging voice and data traffic on your WAN, and retains all the features and services of your existing TDM connections.  In addition to these benefits, IP Trunking is specifically designed to allow you to connect multiple locations over the same VoIP trunk while maintaining local telephone numbers, calling plans and 911 services.

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What is IP PBX?

An IP (Internet Protocol) PBX (Private branch exchange) is a business telephone system designed to deliver voice over a data network and interoperate with the normal Public Switched Telephone Network (PSTN).

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Is it necessary to buy the IP Phones?

No, depending on the solution selected, you can continue to use your PBX, Key System or Analog phones.

How are IP phones different?

IP phones enable you to make IP calls straight from your desktop, allowing your business to remove your PBX or to enable a new site with no investment in a PBX or other traditional voice equipment. These phones also have several other benefits: Moves, adds, and changes support requirements are greatly reduced due to the plug-and play-nature of these devices. They connect to a LAN port and can be configured via the VoIP Web site. A significant benefit is the ability for any user to authenticate on a particular phone, and receive their chosen phone services, such as voicemail, call screening, or forwarding.

Can I use my existing equipment or do I need to start from scratch?

Ravon understands that our customers have substantial investments in circuit-switched hardware and phone systems, so we have created an environment where you can decide what makes sense for your organization. Keep your existing PBX, use your existing phones, or deploy IP phones to the desktop — or do a combination of the options above. Ravon's VoIP products provide unlimited expansion possibilities, growing as your organization grows.

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Quality of Service

Does the voice prioritization used to preserve QoS ever interfere with data traffic?

It typically does not. Data packets may experience some delay under Quality of Service (QoS) voice packet prioritization, but it should not affect delivery in a noticeable way.

Frequently Asked Questions (cont.)

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