Avaya H323 manual Alternate Options

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7.2 Alternate Options

In this document, all IP phone information is issued through the Scope and the Option 176 settings. Depending on the DHCP server, other options may have to be used within the scope.

Option 1 - Subnet mask

Option 3 - Gateway IP Address

If using more than one address, the total list can contain up to 255 total ASCII characters. You must separate IP addresses with commas with no intervening spaces.

Option 6 - DNS server(s) Address

If using more than one address, the total list can contain up to 127 total ASCII characters. You must separate IP addresses with commas with no intervening spaces. At least one address in Option 6 must be a valid, non zero, dotted decimal address.

Option 15 - DNS Domain Name

This string contains the domain name to be used when DNS names in system parameters are resolved into IP addresses. This domain name is appended to the DNS name before the 1600 IP Telephone attempts to resolve the DNS address. Option 15 is necessary if you want to use a DNS name for the HTTP server. Otherwise, you can specify a DOMAIN as part of customizing HTTP as indicated in

Option 51 - DHCP Lease Time

If this option is not received, the DHCP offer is not be accepted. Avaya recommends a lease time of six weeks or greater. If this option has a value of FFFFFFFF hex, the IP address lease is assumed to be infinite as per RFC 2131, Section 3.3, so that renewal and rebinding procedures are not necessary even if Options 58 and 59 are received. Expired leases cause Avaya IP Telephones to reboot.

Avaya recommends providing enough leases so an IP address for an IP telephone does not change if it is briefly taken offline.

DHCP standard states that when a DHCP lease expires, the device should immediately cease using its assigned IP address. If the network has problems and the only DHCP server is centralized, the server is not accessible to the given telephone. In this case the telephone is not usable until the server can be reached.

Avaya recommends, once assigned an IP address, the telephone continues using that address after the DHCP lease expires, until a conflict with another device is detected. The 1600 Series IP Telephone customizable parameter DHCPSTD allows an administrator to specify that the telephone either:

Comply with the DHCP standard by setting DHCPSTD to 1

Continue to use its IP address after the DHCP lease expires by setting DHCPSTD to 0. This is the default. If used, after the DHCP lease expires the telephone sends an ARP Request for its own IP address every five seconds. The request continues either forever, or until the telephone receives an ARP Reply. After receiving an ARP Reply, the telephone displays an error message, sets its IP address to 0.0.0.0, and attempts to contact the DHCP server again.

Option 52 - Overload Option

If this option is received in a message, the telephone interprets the sname and file fields in accordance with IETF RFC 2132, Section 9.3, listed in Appendix B: Related Documentation.

Option 53 - DHCP Message Type

Value is 1 (DHCPDISCOVER) or 3 (DHCPREQUEST).

Option 55 - Parameter Request List

Acceptable values are: 1 (subnet mask), 3 (router IP address[es]), 6 (domain name server IP address[es]), 15 (domain name), NVSSON (site-specific option number)

Option 57 - Maximum DHCP Message Size

Option 58 - DHCP Lease Renew Time

If not received or if this value is greater than that for Option 51, the default value of T1 (renewal timer) is used as per IETF RFC 2131, Section 4.5.

Option 59 - DHCP Lease Rebind Time

If not received or if this value is greater than that for Option 51, the default value of T2 (rebinding timer) is used as per IETF RFC 2131, Section 4.5

Note

The H323 IP phones, any Option 66 settings will be overridden by any TFTP entry in Option 176. Using Option 66 as part of the Scope is useful if alternate Gatekeeper addresses are required in the Option 176 settings whilst keeping within the 127 character limit.

H323 Phone Install

Page 74

IP Office 4.2

15-601046 Issue 15b (16 July 2009)

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Contents H323 IP Telephone Installation IP OfficeH323 Phone Install IP Office Contents Page Chapter IP Office IP Phones Page ∙ Network Assessment ∙ Dhcp versus Static IP InstallationIP Office IP Phones What is New IP Office∙ Secondary Site Specific Options Number ∙ Http User Backup and Restore∙ IP Phone Restart using System Status Application ∙ IP500 Dhcp EnhancementsSupported Phones H323 IP Supported IP Office Core Phones Models SoftwareCall Capacity System CapacityExtension Capacity IP Office UnitPhone Firmware Simple Installation Complex Installation Installation Requirements ∙ G711 20ms ∙ G723a 80ms ∙ G729 40ms Network Assessment∙ Warning a Network Assessment is Mandatory Installing VCM Cards Voice CompressionIP400 VCM Cards IP500 VCM cardsPotential VoIP Problems 10 QoS∙ Gigabit Ethernet User PC Connection232 IP With Supports Phone Dedicated Plug-Top Power Supply Units Power Supply OptionsSpare Wire Power Options ∙ Avaya 1151D1 Power Supply Unit PSU∙ Power of Ethernet POE Switch 802.3af Power over Ethernet PoE Options∙ Avaya 1152A1 Power Distribution Unit Mid-Span Power Unit Phone 802.3af ClassIP Office Unit Memory Card File Server OptionsIP Office Manager 3rd Party SoftwareFile Auto Generation Control Unit Memory Card Transferring Files to the Card Using File ManagementTransferring Files to the Card Using Tftp Page Chapter Installation Installation Dhcp Server ∙ o Dhcp ModeIP Phone Software and Settings Files ∙ o Number of Dhcp IP AddressesCreating/Editing the Settings File Backup/Restore Installation Creating/Editing the Settings FileManually Creating Extensions ∙ To switch to static address installation Phone ConnectionStatic Address Installation ∙ Ext. = ∙ Password =Phone Registration Extension & User Setup Phone SecurityManual Backup/Restore Control Backup RestoreHttp Authentication Specifying the Bruri ValueSeries Phone Backup File Field DescriptionHttp Server Configuration for Backup/Restore Select PropertiesListing Registered Phones Error Messages Page Chapter Other Installation Options Other Installation Options VPN Remote PhonesLicensing VPNremote Phones on IP Office Installation DocumentationSupported VPNremote Phone Firmware Product Section Title Doc ReferenceConfiguring the IP Phone for VPNremote Enable VPN Phone AllowedVlan and IP Phones Type Description Advantages DisadvantagesDhcp Option Description Option Data Vlan Dhcp Settings Voice Vlan Dhcp SettingsVlan and Dhcp Example setup Overview HP-Switch ConfigurationHP Procurve CLI output Port Vlan Description Voice DataPort Vlan 209 Voice Vlan 210 Data Example System OverviewOption Value Page Chapter Static Administration Options Hold vs Mute Static Administration OptionsEntering Data for Administrative Options ∙ 4601, 4602, 5601, 5602 Speaker keyQOS Option Settings Secondary Ethernet Hub/IR Interface Enable/DisableView Details ∙ If self-test fails Self-Test Procedure∙ If self-test passes Clearing a Phone Resetting a PhoneResetting a Phone Site Specific Option Number Setting the Sson on an IP PhoneSetting the Sson on IP Office ∙ Handset AGC = Switching automatic gain control on/offAutomatic Gain Control ∙ Headset AGC =Chapter Restart Scenarios Restart Scenarios No Application File or Application File Needs Upgrading Boot File Needs UpgradingCorrect Boot File and Application File Already Loaded Page Chapter Infrared Dialling ∙ Swap Text Files During a Call Infrared Dialling∙ Dial a Number to Start a Call Palm Organizer Enabling the IR PortDialling Phone Numbers Windows Pocket PCBeaming Files During a Call Chapter Alternate Dhcp Server Setup Alternate Dhcp Server Setup Select Start Programs Administrative Tools Dhcp Using a Windows Dhcp ServerWindows Dhcp Setup for H323 IP Phones Checking for Dhcp2b. Adding a 242 Option ∙ Data type String ∙ Code2c. Adding a 176 Option Alternate Options Chapter WML Server Setup WML Server Setup What WML is SupportedConfiguring the Xitami Web Server for WAP Testing 4620 WML Browsing Using XitamiInstalling the Web Server IntroductionInstalling Sample WML Pages 4a. Creating a Simple WMLSetting the Home SET Wmlport∙ Associated extension wml Apache Web Server WML ConfigurationMicrosoft IIS Web Server WML Configuration Case 2. Input Box Followed by an a Tag Open URL EntryCase 1. Input Box Followed by an Anchor Tag Case 3. Input Box Followed by a Submit ButtonPage H323 Phone Install IP Office Issue 15b 16 July IndexAvpp Conflict END of Avaya 4620 IP Phone VCM L2QVLAN PWB SN Sson SET Dnssrvr SET Domain Tftpdir Vlanid Vlantest 47 H323 Phone Install IP Office Tel +44 1707 Fax +44