Overview of Voice over IP (VoIP) and Network Protocols

HTTP

HTTP is potentially a more secure alternative to TFTP, particularly when Transport Layer Security (TLS) is used to create HTTPS (Secure HTTP). You can store the same application software, script file, and settings file on an HTTP server as you can on the TFTP server. With proper administration, the telephone seeks out and uses that material appropriately. However, the 4600 Series IP Telephone must already be running Release 2.2 software to be able to access and use HTTP servers. As with TFTP, some functionality might be lost by a reset if the HTTP server is not available. For more information, see DHCP and File Servers on page 47 and HTTP on page 66.

DNS

The Domain Name System (DNS) is a distributed Internet directory service. DNS is used mostly to translate between domain names and IP Addresses. Release 1.5 and later Avaya IP Telephones can use DNS to resolve names into IP Addresses. In DHCP, TFTP, and HTTP files, DNS names can be used wherever IP Addresses were available as long as a valid DNS server is identified first. See DNS Addressing on page 84.

NAT

A Network Address Translation (NAT) is an application that can be administered between your network and the Internet. The NAT translates network layer IP Addresses so your local intranet IP Addresses can duplicate global, Internet addresses. A detailed discussion of NAT is beyond the scope of this document. Note that NAT use can lead to problems that affect the consistency of addressing throughout your network. In Release 1.6 and earlier releases of the 4600 Series IP Telephones, NAT is not recommended for networks handling IP-based telephony traffic. As of Release 1.7, all 4600 Series IP Telephones support NAT interworking. Therefore, no problems exist with NAT and Release 1.7 of the 4600 Series IP Telephones. Note that support for NAT does not imply support for Network Address Port Translation (NAPT). Specifically, the 4600 Series IP Telephones do not support communication to the PBX through any NAPT device.

NAT requires specific administration on the media server. The capability to have a direct Avaya IP Telephone-to-Avaya IP Telephone call with NAT, also called “NAT shuffling,” requires Avaya Communication Manager Release 1.3 software. See the Administration for Network Connectivity document listed in Related Documents on page 15.

24 4600 Series IP Telephone Release 2.2 LAN Administrator Guide

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4600 specifications

The Avaya 4600 series is a line of IP telephones designed for enterprise communication. Known for its robust features and reliability, the 4600 series has been widely adopted in various business environments, from small companies to large corporations.

One of the standout features of the Avaya 4600 series is its support for Voice over Internet Protocol (VoIP). This enables businesses to make voice calls over the internet, which can significantly reduce telecommunications costs. The integration of VoIP technology also allows for seamless communication across different locations, making it ideal for businesses with multiple branches or remote employees.

The design of the Avaya 4600 series phones is user-friendly, featuring a clear display and an intuitive interface. Users can easily navigate through various options, making calls, accessing voicemail, and managing contacts a straightforward task. Many models in the series include customizable soft keys, which allow individuals to tailor the phone's functions to their specific needs. This flexibility is crucial in environments where employees need to quickly adjust their communications settings.

Another key characteristic is the high-quality audio. The Avaya 4600 series incorporates advanced audio technologies that ensure clear and crisp sound quality during calls. This is essential for effective communication, particularly in large meetings or conference calls where clarity is vital.

The Avaya 4600 series also supports various network protocols, including Session Initiation Protocol (SIP), providing compatibility with a wide range of network infrastructures and allowing organizations to choose the system that best fits their needs. This versatility makes the 4600 series an appealing choice for businesses looking to future-proof their communication systems.

Security is a major consideration in any enterprise communication solution, and Avaya has incorporated features in the 4600 series to protect against unauthorized access and cyber threats. Encryption protocols help safeguard call data, ensuring that sensitive business information remains secure.

In terms of deployment, the Avaya 4600 series can be easily integrated into existing networks, as well as managed remotely, which simplifies the installation and maintenance process. This feature is particularly beneficial for large enterprises that require scalability across multiple locations.

Overall, the Avaya 4600 series combines advanced technology, user-friendly design, and comprehensive security measures to provide a reliable and effective communication solution for businesses. As enterprises continue to adapt to a rapidly changing communication landscape, the Avaya 4600 series remains a strong contender for organizations seeking to enhance their telecommunications infrastructure.
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