Avaya 4600 manual Tandem Coding, Voice Coding Standards, Telephony Protocols

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Overview of Voice over IP (VoIP)

Tandem Coding

Tandem coding, also called transcoding, refers to converting a voice signal from analog to digital and back again. When calls are routed over multiple IP facilities, they can be subject to multiple transcodings. The multiple conversions between analog and digital coding result in a deterioration in the voice quality. Avoid tandem coding wherever possible in any compressed voice system, for example, by minimizing analog trunking on the PBX.

Voice Coding Standards

There are several voice coding standards. Avaya 4600 Series IP Telephones offer these options:

●G.711, which describes the 64 kbps PCM voice coding technique. G.711-encoded voice is already in the correct format for digital voice delivery in the public telephone network or through PBXs.

●G.726 ADPCM at 32Kbps.

●G.729A and G.729B, both of which describe adaptive code-excited, linear-predictive (CELP) compression that allows voice to be coded into 8 kbps streams.

Telephony Protocols

There are two major protocols used for Voice over IP (VoIP) signaling - Session Initiation Protocol (SIP) and H.323. The two protocols provide connection control and call progress signaling, but in very different ways. These protocols can be used simultaneously over the same network, but in general, no endpoint supports both protocols at the same time. Neither protocol is necessarily superior, but each offers some unique advantages. SIP telephones, for example, do not require centralized call servers, and can route telephone calls when a URL identifies the destination. H.323 telephones leverage the call server’s presence into the potential availability of hundreds of telephone-related features that a standalone SIP telephone cannot provide.

DHCP

Dynamic Host Configuration Protocol (DHCP) allows a server to assign IP addresses and other parameters to devices like the 4600 Series IP Telephones on an as-needed basis. DHCP eliminates the need to configure each end station with a static IP address. The DHCP application also passes information to the 4600 Series IP Telephone. The DHCP application identifies the PBX and the file server’s IP addresses. The application also identifies the paths to the upgrade script and the application file on the file server.

For further information, see DHCP and File Servers on page 59 and DHCP on page 61.

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Contents Series IP Telephone Security Introduction Requirements Diffserv Appendix a Avaya 46xx IP Telephone MIB 151 Appendix D Administering Thin Client Directories 171 Contents Series IP Telephone LAN Administrator Guide About This Guide IntroductionIntended Audience Appendix a Avaya 46xx IP Telephone MIB Document OrganizationChange History What’s New in Issue Terms Used in This Guide Media SignalingChannel EncryptionVoIP SupplicantUnnamed Online Documentation AdministrativeConventions Used in This Guide ItalicsAvaya Communication Manager Documentation Release Related DocumentsAvaya Communication Manager Software Documentation Release Administrator Guide for Avaya Communication Manager Avaya IP Telephone Snmp Security White Paper, Issue30A Switched Hub Set Up Quick Reference, Issue 2, July 2002 Series IP Telephones Safety InstructionsSeries IP Telephone Installation Guide Avaya IP Telephone File Server Application Reference Guide4610SW SIP IP Telephone User Guide 4610SW IP Telephone User Guide4620/4620SW/4621SW IP Telephone User Guide 4620SW/4621SW SIP IP Telephone User GuideIetf Documents Schulzrinne RFC ITU Documents ISO/IEC, ANSI/IEEE Documents Customer SupportPage Data and Voice Network Similarities IntroductionOverview of Voice over IP VoIP Delay and Jitter Telephony Protocols Tandem CodingVoice Coding Standards Tftp TftpQoS NATNetwork Assessment SnmpSeries IP Telephones Dhcp and File Servers SoftwareWAN Considerations 323Telephone to Network Initialization ProcessDhcp Server to Telephone Telephone and File ServerTelephone and the Call Server , , and Figure TCP/UDP Port UtilizationAnother IP endpoint Media Gateway orRtcp Monitor Voice Monitoring ManagerHttp Server Https ServerTftp Server DNS ServerWeb or Proxy Server Directory ServerFTP Server IP SoftphoneReliability and Performance Suggestions for Installation and ConfigurationApplications Series IP Telephone Another 4600 Series IP TelephoneIP Address Lists and Station Number Portability Security Suggestions for Installation and Configuration Page Hardware Requirements RequirementsExcept Media Server Avaya IP IP Telephone Release H.323 onlyAdditional Hardware Requirements Series IP Telephone Safety InstructionsSee the 4600 Series IP Telephone Installation Guide Software Requirements Software Requirements Page Server Administration IP Telephone Installation Guide 4600 IP Telephone Installation GuideDhcp Lldp4600 IP Telephone Installation Telephone Installation GuideSson Dhcp GuideAlso, Customizing the 4630/4630SW IP Dhcp TFTP/HTTP Parameter Data PrecedenceDefinity Release Required Network Information Software ChecklistDhcp and File Servers Network Information Before Installation Per Dhcp Server on Dhcp Software Alternatives Choosing a Dhcp ConfigurationDhcp Generic Setup Option 59 Dhcp lease rebind time, if desired Option 52 Overload Option, if desiredOption 58 Dhcp lease renew time, if desired L2Q=1,L2QVLAN=xxx,PHY2VLAN=yyy Ipadd Dhcpack Setting of System Values Set toNetmask GipaddWindows NT 4.0 Dhcp Server Select Start--Settings--Control PanelExample Select Start--Programs--Admin Tools--DHCP ManagerClick Edit Array Editing Custom OptionsSelect Scope under Dhcp Options Select Defaults from the DHCPOptions menuSelect option 003 from the Unused Options list Select the Global parameter under Dhcp OptionsVerify the Scope Option, 176 46XXOPTION Windows 2000 Dhcp ServerSelect Start--Programs--Administrative Tools--DHCP Creating and Configuring a Dhcp ScopeCompleting the New Scope Wizard dialog box displays Change the Data Type to String Under Predefined Options and Values, click AddActivating the New Scope Tftp H.323 OnlyAvaya File Server Application Tftp Generic SetupTftp Server on S8300 Media Server Http Http Generic SetupSeries IP Telephone Scripts and Application Files 78 4600 Series IP Telephone LAN Administrator Guide Choosing the Right Application File and Upgrade Script File 80 4600 Series IP Telephone LAN Administrator Guide Contents of the Upgrade Script Contents of the Settings File Group System Value # Callcenter Ieee 802.1D and 802.1Q QoS86 4600 Series IP Telephone LAN Administrator Guide UDP Port Selection H.323 Only DiffservParameters in Real-Time Possible Values Network Audio Quality Display on 4600 Series IP TelephonesRsvp and Rtcp Internal Audio Variables Description Possible Values Internal Audio ParametersVlan Detection Vlan ConsiderationsVlan Tagging Vlan Separation PHY2VLAN Vlan Separation Rules ThenIeee Unnamed Registration802.1X Supplicant Operation 802.1X Pass-Through and Proxy LogoffLink Layer Discovery Protocol Lldp MAC / PHY BootnameTIA Lldp MED LLDP-MED TIA Lldp MEDCnasrvr Parameter Name Impact Impact of TLVs on System Parameter ValuesAdministering Options for the 4600 Series IP Telephones 4600 Series IP Telephone Customizable System Parameters Parameter Name Default Value Description and Value RangeCtistat CoverageaddrCtiudpport DateseparatorDomain DnssrvrDOT1X DstoffsetEnhdialstat DststopGmtoffset IcmpduL2QSIG L2QAUDL2QVLAN McportPhndplength PhnccPhnic PhnldProcpswd PHY2STATProcstat PushcapSipport SipproxysrvrSipregistrar SnmpaddStatic = StaticVlansep VlantestCustomizing the Site-Specific Option Number Sson Entering Options Using the Telephone DialpadDNS Addressing Enhanced Local Dialing Setting the Date and Time on SIP IP Telephones 4xxx68xxx*xx9Z1xxxxxxxxxx9z011x+ Setting the Dial Plan on SIP IP TelephonesPhnemergnum Customizing the 4630/4630SW IP TelephoneVoice Mail Application Parameters Stock Ticker Application ParametersWebproxy WebhomeWebexcept WebportSetting/Parameter Name Type 4630/4630SW Backup/RestoreCall Log Archive Ftpdir AppstatSyslang FtpuserstatSubscribelist TpslistBacklight Parameters 4625SW only Backup/Restore ParametersApplication Status Flags and Their Meaning Appstat Value Application Status Flag AppstatIssue 4 August 2006 124 4600 Series IP Telephone LAN Administrator Guide Issue 4 August 2006 Page Error Conditions Troubleshooting GuidelinesTroubleshooting Guidelines Resolution As above 130 4600 Series IP Telephone LAN Administrator Guide Explained in the 4600 Series IP Telephone Installation GuideResolution None Return Line Feed . Some Unix PC Ethernet Interface setting to File for the PC Ethernet Interface settingSeries IP TelephoneSee of the 4600 Series IP Telephone Installation Guide Clear Administrative OptionClear all values? =no #=yes Mute 2 5 3 2 7 # Mute C L E a R #Mute 7 3 7 3 8 # Mute R E S E T # Reset Administrative OptionReset System Values Reset values? =no #=yes Restart the Telephone Mute 8 4 3 9 # Mute V I E W # View Administration OptionPWB SN Viewing Parameter Values Name System Value FormatPWB MACGroup Viewing Parameter ValuesName System Value Format Aaa.bbb.ccc.ddd Error MessagesFile too large During Registration Addr option. The 4600 Series IP TelephoneFailed to set phone IP Password Error Current options 4630/4630SW IP Telephone User Guide, or Troubleshooting the 4601 IP TelephoneExtension 150 4600 Series IP Telephone LAN Administrator Guide Downloading the Avaya 46xx IP Telephone MIB Appendix a Avaya 46xx IP Telephone MIBPage Introduction General Background Browser Features and BehaviorDocument Skeleton Content-Based StyleEnclosed text is shown in an italic font Enclosed text is shown in a monospaced fontEnclosed text is shown in a bold font Logical StylePhysical Spacing and Layout Physical StyleLists Lists and TablesImages Frames LinksForms Fonts Character EntitiesColors Fixed-Width Objects Design GuidelinesCookies 164 4600 Series IP Telephone LAN Administrator Guide Maintaining Context Click-to-Dial Functionality User InteractionGenerated code is rendered as this Web Page Appendix C Creating Web Sites for Other Series IP Telephones Page Appendix D Administering Thin Client Directories Page Push Content Appendix E The Push FeatureFor More Information on Push Push PrioritiesIndex 176 4600 Series IP Telephone LAN Administrator Guide Registration, Unnamed Related Documents Index 178 4600 Series IP Telephone 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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