Avaya SIP Firmware for IP Phone 1140E User Manual

SIP Firmware Release 1.1 for IP Phone 1140E Administration

NN43113-300

Document status: Standard Document version: 02.05 Document date: 27 May 2008

LEGAL NOTICE While the information in this document is believed to be accurate and reliable, except as otherwise expressly agreed

to in writing NORTEL PROVIDES THIS DOCUMENT AS IS WITHOUT WARRANTY OR CONDITION OF ANY KIND, EITHER EXPRESS OR IMPLIED. The information and/or products described in this document are subject to change without notice.

Sourced in Canada Nortel, the Nortel Logo, the Globemark, SL-1, Meridian 1, and Succession are trademarks of Nortel Networks. All other trademarks are the property of their respective owners.

Contents

New in this release 7

Other changes 7

How to Get Help 9

Getting Help from the Nortel Web site 9 Getting Help over the telephone from a Nortel Solutions Center 9 Getting Help from a specialist using an Express Routing Code 10 Getting Help through a Nortel distributor or reseller 10

Introduction to this guide 11

Subject 11 Intended audience 11 Acronyms 11 Related publications 13

Overview 15

Introduction 15

Supported SIP proxy servers 20

Revision history 7

SIP overview 15 IP Phone 1140E with SIP Firmware 15 Related documentation 16 Installation overview 17

Before installation 21

Introduction 21 Preinstallation 21

Conﬁgure the provisioning server 25

How provisioning works 25 Download the SIP Firmware to the provisioning server 26 Create the SIP provisioning ﬁle on the provisioning server 26 Create the device conﬁguration ﬁle on the provisioning server 31

Device conﬁguration commands 34

Create the Dialing Plan ﬁle on the provisioning server 50

Dialing function description 52

Downloadable WAV ﬁles 56

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Conﬁgure the DHCP server 57

Partial DHCP mode 57 Full DHCP mode 58

Conﬁgure the DHCP server to support Full DHCP mode 59 DHCP VLAN Auto Discovery 61

Physically install the IP Phone 1140E 63 Upgrade and convert the IP Phone 1140E ﬁrmware 67

Introduction 67 Upgrade the SIP Firmware on the IP Phone 1140E 67

Download the SIP Firmware to the provisioning server 67 Modify the SIP provisioning ﬁle 68

Upgrade to the minimum UNIStim Firmware 69

Identify the current version of UNIStim Firmware 69 Upgrade UNIStim Firmware to the minimum required UNIStim Firmware 72

Convert UNIStim Firmware to SIP Firmware on the IP Phone 1140E 75

Voice Quality Monitoring 79

Feature overview 79 VQMon set-up 79 Server set-up 80 How VQMon works 80

Device Settings on the IP Phone 1140E with SIP Firmware 81

Introduction 81

802.1x (EAP) Port-based network access control 82

Conﬁgure the device settings 89

Multiple Appearance Directory Number (Single Call

Arrangement) 97

Vertical services 97

Privacy 98

Feature dependencies and restrictions 98

Emergency 911 - Operator control of disconnect 99

Overview 99 Location information 99 Dialing plan conﬁguration 100 Characteristics of E911 calls 100

IP Phone 1140E restrictions 101

Service package restrictions 101 Distinctive Ringing feature 101

NAT ﬁrewall traversal 103 Three-port switch and VLAN functionality 105

System overview 105

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Contents 5

SIP messages supported by the IP Phone 1140E 109

SIP methods 109 SIP responses 110

1xx Response--Information Responses 110 2xx Response--Successful responses 111 3xx Response--Redirection responses 111 4xx Response--Request failure responses 112 5xx Response--Server failure responses 114

6xx Response--Global responses 115 Default error handling 115 SIP header ﬁelds 115 Session description protocol usage 118 SDP and Call Hold 119 Transport layer protocols 119 SIP security authentication 119 SIP DTMF Digit transport 120 Supported subscriptions 120 Supported instant messaging 120

Maintenance and troubleshooting 123

Convert SIP Firmware to UNIStim Firmware 123 IP Phone 1140E diagnostics 124

Index 127

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New in this release

Other changes

For a detailed history of past releases of this document, see "Revision

history" (page 7).

Revision history

May 2008

Standard 02.05. This document is up-issued to reﬂect changes in technical content.

February 2008

Standard 02.04. This document is up-issued to include editing changes.

November 2007

Standard 02.03. This document is up-issued to reﬂect changes in the technical information in response to change requests. A note was added stating that NAT_SIGNALLING is required for networks that use STUN or SIP_PING for NAT traversal. The commands FORCE_OCT_END and OCT_END were changed to FORCE_OCT_ENDDIAL and DISABLE_OCT_ENDDIAL respectively.

October 2007

Standard 02.02. This document is up-issued to ensure that the value of

802.1P_MEDIA parameter in the QoS and ToS commands must be set to

-1 to be able to have a voice path.

July 2007

Standard 02.01. This document is up-issued to support SIP Firmware for IP Phone 1140E Maintenance Release 1.1.

March 2007

Standard 01.02. This document is up-issued to incorporate an addition to the Maintenance and Troubleshooting section.

January 2007

Standard 01.01. This is a new document created to support the IP Phone 1140E with SIP Firmware.

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How to Get Help

This section explains how to get help for Nortel products and services.

Getting Help from the Nortel Web site

The best way to technical support for Nortel products is from the Nortel Technical support Web site:

ww.nortel.com/support

This site provides quick access to software, documentation, bulletins, and tools to address issues with Nortel products. More speciﬁcally, the site enables you to:

•

download software, documentation, and product bulletins

•

search the Technical Support Web site and the Nortel Knowledge Base for answers to technical issues

• sign up for automatic notiﬁcation of new software and documentation

for Nortel equipment

•

open and manage technical support cases

Getting Help over the telephone from a Nortel Solutions Center

If you do not ﬁnd the information you require on the Nortel Technical Support Web site, and have a Nortel support contract, you can also get help over the telephone from a Nortel Solutions Center.

In North America, call 1-800-4Nortel (1-800-466-7835). Outside North America, go to the following Web site to obtain the telephone

number for your region:

ww.nortel.com/callus

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10 How to Get Help

Getting Help from a specialist using an Express Routing Code

To access some Nortel Technical Solutions Centers, you can use an Express Routing Code (ERC) to quickly route your call to a specialist in your Nortel product or service. To locate the ERC for your product or service, go

ww.nortel.com/erc

to w

Getting Help through a Nortel distributor or reseller

If you purchased a service contract for your Nortel product from a distributor or reseller, contact the technical support staff for that distributor or reseller.

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Introduction to this guide

Subject

SIP Firmware Release 1.1 for IP Phone 1140E Administration

(NN43113-300) describes how to install, conﬁgure, and provision the IP Phone 1140E for use on a SIP network.

Intended audience

This administration guide is intended for system administrators of the Nortel IP Phone 1140E with a basic understanding of SIP. This guide is not intended for end users of the IP Phone 1140E. Many of the tasks outlined in the guide inﬂuence the function of the IP Phone 1140E on the network and require an understanding of telephony and Internet Protocol (IP) networking.

Acronyms

This guide uses the following acronyms:

Table 1 Acronyms used

AAA Authentication, Authorization, and Accounting ALG Application Layer Gateway DHCP Dynamic Host Configuration Protocol DNS Domain Name System DRegex Digit Regular Expression DSCP Differentiated Services Code Point EAP Extensible Authentication Protocol ERE Extended Regular Expressions FQDN Fully Qualified Domain Name FTP File Transfer Protocol GARP Gratuitous Address Resolution Protocol GUI Graphical User Interface HTTP Hyper Text Transfer Protocol

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12 Introduction to this guide

IETF Internet Engineering Task Force ISDN Integrated Services Digital Network IM Instant Message IP Internet Protocol IPCM Internet Protocol Client Manager ITU-T Telecommunications Standardization sector of the International

Telecommunications Union LAN Local Area Network MAC Media Access Control MADN Multiple Appearance Directory Number MAS Media Application Server NAT Network Address Translator NetConfig Configuration screens available after an IP Phone resets NDU Network Diagnostic Utility PDT Problem Determination Tool PEC Product Engineering Code POE Power Over Ethernet POSIX Portable Operating System Interface PRACK Provisional Acknowledgement PSTN Public Switched Telephone Network PVQMon Proactive Voice Quality Monitoring QoS Quality of Service RADIUS Remote Authentication Dial In User Service RTCP Real-time Control Protocol RTCP XR RTP Control Protocol Extended Reports RTP Real-time Transfer Protocol SCA Single Call Arrangement SDP Session Description Protocol SIMPLE SIP for Instant Messaging and Presence Leveraging Extensions SIP Session Initiation Protocol SMTP Simple Mail Transfer Protocol STUN Simple Traversal of UDP through NAT devices TFTP Trivial File Transport Protocol TPS Terminal Proxy Server TTL Time-to-live

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UDP User Datagram Protocol UFTP UNIStim File Transfer Protocol UNIStim Unified Network IP Stimulus Protocol VoIP Voice over IP VLAN ID Virtual Local Area Network Identification VLAN IP Virtual Local Area Network Internet Protocol VQMon Voice Quality Monitoring

Related publications

Other publications related to the SIP Firmware Release 1.1 for IP Phone 1140E Administration are:

•

SIP Firmware Release 1.1 for IP Phone 1140E Quick Reference Card

(NN43113-102)

•

SIP Firmware Release 1.1 for IP Phone 1140E User Guide

(NN43113-101)

Related publications 13

•

Nortel IP Phone 1100 Series product bulletins on w

port.

ww.nortel.com/sup-

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14 Introduction to this guide

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Overview

Introduction

This chapter describes the hardware and ﬁrmware features of the Nortel IP Phone 1140E and provides a brief overview of Session Initiation Protocol (SIP).

SIP overview

Session Initiation Protocol (SIP) is a signaling protocol used for establishing multimedia sessions in an Internet Protocol (IP) network.

SIP is a text-based protocol similar to HTTP and SMTP. With the introduction of SIP to IP Phones, telephony integrates easily with other Internet services. SIP allows the convergence of voice and multimedia.

IP Phone 1140E with SIP Firmware

The IP Phone 1140E connects to an IP network using an Ethernet connection. All voice and signaling information is converted into IP packets and sent across the network.

The IP Phone 1140E can be ordered with UNIStim Firmware installed or with SIP Firmware installed. UNIStim Firmware and SIP Firmware use the same hardware, but the model number of an IP Phone 1140E with UNIStim Firmware is different from the model number of an IP Phone 1140E with SIP Firmware.

If you have an IP Phone 1140E with UNIStim Firmware, you can convert the ﬁrmware to SIP Firmware. The most recent version of SIP Firmware can be obtained from Nortel and installed on the IP Phone 1140E.

This guide explains how to:

•

conﬁgure the provisioning server and the DHCP server. Note: The provisioning server is where the ﬁrmware and the conﬁguration ﬁles for the IP Phone 1140E reside. This is not the IP Client Manager (IPCM) of the call server.

•

convert an IP Phone 1140E with UNIStim Firmware to an IP Phone 1140E with SIP Firmware

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16 Overview

•

provision the Device Settings parameters on the IP Phone 1140E with SIP Firmware

Note: Converting the ﬁrmware on an IP Phone 1140E from UNIStim Firmware to SIP Firmware overwrites the UNIStim Firmware. The IP Phone 1140E cannot operate in both modes simultaneously. A switch from UNIStim to SIP Firmware or SIP to UNIStim Firmware requires a ﬁrmware reload.

The following ﬁgure shows the main components of the IP Phone 1140E with SIP Firmware.

Figure 1 IP Phone 1140E with SIP Firmware

Installation overview

To install the IP Phone 1140E with SIP Firmware, three basic steps are required.

Introduction 17

Procedure 1 Installation overview

Step Action 1

Conﬁgure the provisioning server and, optionally, the DHCP server. The function of the provisioning server is to provide conﬁguration options to every IP Phone 1140E throughout the network. TheDHCP server can be conﬁgured to provide basic network-conﬁguration data or a more comprehensive set of network-conﬁguration data for the IP Phone 1140E with SIP Firmware.

2 3

Load SIP Firmware on the IP Phone 1140E. Conﬁgure the initial network-conﬁguration parameters on the IP

Phone 1140E with SIP Firmware.

—End—

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18 Overview

Figure 2 Installation of IP Phone 1140E with SIP Firmware, page 1 of 2

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Figure 3 Installation of IP Phone 1140E with SIP Firmware, page 2 of 2

Introduction 19

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20 Overview

Supported SIP proxy servers

Call server Call server release Minimum SIP Firmware on

the IP Phone 1140E

MCS 5100

MCS 5100 with CS 1000

CS 1500

3.5 1.0

4.0 1.0

3.5

4.5

3.5

5.0

4.0

5.0

1.0 1.1

CS 2000 SN09U

CS 2000 SN10

CS 2100 SE09.1

1.0

1.1

CS 2100 SE10

BroadSoft

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Before installation

Introduction

This chapter features a checklist of tasks you must complete before you install SIP Firmware on the IP Phone 1140E.

Preinstallation

Complete the following checklist.

Procedure 2 Preinstallation checklist

Step Action 1 Read and become familiar with the SIP Firmware Release 1.1

for IP Phone 1140E User Guide (NN43113-101) and the SIP Firmware Release 1.1 for IP Phone 1140E Quick Reference Card

(NN43113-102).

Ensure there is one IP Phone 1140E boxed package for each IP Phone 1140E being installed.

Table 2 IP Phone 1140E box contents

Item

IP Phone 1140E Graphite with icon keys without PS (SIP) (RoHS)

IP Phone 1140E Graphite with English keys without PS (SIP) (RoHS)

Accessories

Handset, Charcoal NTYS09AA70 Handset cord, Charcoal NTYS10AA70

Ensure that the IP Phone 1140E box includes:

Order number

NTYS05CAE6 N0142353

NTYS05DAE6 N0142354

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22 Before installation

Footstand kit, Charcoal NTYS11AA70 Telephone number label and lens kit NTYS12AA

2.3 m (7 ft) CAT5 Ethernet cable NTYS13AA

The IP Phone 1140E can be powered either by Power Over Ethernet (POE) or powered through an external power supply. Order the external power supply separately.

Table 3 1100 series phones separably orderable parts

Item Power adapter contents include:

Global power supply (optional) N0023000

AC cord package includes one of the following:

1.8 m (5.9 ft), 10 amp, IEC320-C13 North America

3 m (9.9 ft), 125 VAC 13 amp, NA power cord, NEMA North America, Middle East, Taiwan, Philippines, Thailand, and Japan

2.4 m (8 ft), 240 VAC 10 amp, ANZ power cord AS-3, Australia, New Zealand

250 VAC, Option 11C Standard European power cord, Other EMEA, Kenya, Korea, Thailand, Indonesia, Vietnam, India, Pakistan

3 m (9.9 ft) 125 VAC, Option 11C Swiss power cord Switzerland

240 VAC, Option 11C UK power cord Hong Kong, Ireland, United Kingdom, Singapore, Malaysia, Bangladesh, Brunei, Sri Lanka

3 m (9.9 ft), 125 VAC, Option 11C Denmark power cord Denmark

Order number

NTYS14AA

NTTK14AB

NTTK15AA

NTTK16AB

NTTK17AB

NTTK18AB

NTTK22AB

SIP Firmware Release 1.1 for IP Phone 1140E Administration

CAUTION

TheIP Phone 1140E must be plugged into a10/100-BaseT Ethernet jack. Severe damage occurs if this IP Phone 1140E is plugged into an ISDN connection.

Ensure that the location meets the network requirements:

•

a DNS server and a DHCP server with DHCP relay agents installed, conﬁgured, and running. It is possible to run the IP

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Preinstallation 23

Phone 1140E without these servers in MCS 5100 Release

3.5, but Nortel recommends using these servers to aid in the deployment and conﬁguration of the IP Phone 1140E with SIP Firmware. Using DHCP and DNS servers with CS 2000 network is recommended but not mandatory.

•

An Ethernet connection to a network with an appropriate SIP proxy server.

•

One of the following ﬁle servers used as a Provisioning server: — TFTP server — FTP server — HTTP server

Only a TFTP server can be used for an initial UNIStim-to-SIP Firmware conversion. An IP Phone 1140E with SIP Firmware can operate with a TFTP, FTP, or HTTP ﬁle server.

—End—

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24 Before installation

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Conﬁgure the provisioning server

ATTENTION

If you have UNIStim Firmware on your IP Phone 1140E, the ﬁrmware must be converted from UNIStim to SIP before you proceed with the following instructions. See the chapter "Upgrade and convert the IP Phone 1140E ﬁrmware" (page

67) for instructions on how to convert the ﬁrmware on an IP Phone 1140E from

UNIStim to SIP.

If the IP Phone 1140E is installed with SIP Firmware, further SIP Firmware upgrades can be done with a TFTP, an FTP, or an HTTP server.

How provisioning works

Provisioning is performed without interaction with the call server. The IP Phone 1140E with SIP Firmware connects directly with the provisioning server in order to retrieve ﬁrmware ﬁles and conﬁguration ﬁles. In this case, the provisioning server is not to be confused with the IP Client manager on the call server. The methods of provisioning are:

•

Automatic provisioning at power-up: After the IP Phone 1140E powers up or is reset, it checks the provisioning server for the latest ﬁles.

•

Provisioning through user interaction: The end user can manually check for updates by pressing the Services Context-sensitive soft key and selecting SystemSystem . In the menu select Check for Updates.

•

Automatic provisioning at a preconﬁgured time: The IP Phone 1140E with SIP Firmware checks for updates every 24 hours, at a time speciﬁed by a parameter in the device conﬁguration ﬁle.

The following steps are taken when provisioning updates occur. The IP Phone 1140E with SIP Firmware:

1. connects to the provisioning server

2. retrievesthe provisioning ﬁle (1140eSIP.cfg) from the provisioning server

3. reads and acts upon the content of the provisioning ﬁle and decides whether any other ﬁle is needed, based on a set of rules. If ﬁles need to be downloaded to the IP Phone 1140E, a new ﬁle transfer session starts

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26 Conﬁgure the provisioning server

for each ﬁle to be downloaded. The provisioning ﬁle (1140eSIP.cfg) can contain commands that prompt for conﬁrmation before a ﬁle is downloaded.

Download the SIP Firmware to the provisioning server

To download the SIP Firmware, follow the steps in the next procedure.

Procedure 3 Downloading SIP Firmware for IP Phone 1140E from the Nortel Web site

Step Action 1

Go to w Log on to the Nortel Web site with a valid Nortel User ID and

ww.nortel.com/support.

Password. The Technical Support page appears.

3 4 5

Enter IP Phone 1140E in the Knowledge and Solution Engine box. Select Software in the All types scroll down menu. Press the gray arrow at the end of the Knowledge and Solution

Engine box to obtain the Search Results.

From the Search Results, select the appropriate version of the SIP Firmware for the IP Phone 1140E, for example, SIP IP Phone 1140E

Release 0625C1HD26.bin.

Place the selected ﬁrmware on the provisioning server.

—End—

Create the SIP provisioning ﬁle on the provisioning server

The provisioning ﬁle is downloaded from the provisioning server to the IP Phone 1140E every time the IP Phone 1140E checks for updates. The provisioning ﬁle is a clear text ﬁle that has the naming convention 1140eSIP.cfg. The following is an example of a provisioning ﬁle:

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Figure 4 Sample provisioning ﬁle

Create the SIP provisioning ﬁle on the provisioning server 27

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28 Conﬁgure the provisioning server

Table 4 Provisioning ﬁle supported sections

[DEVICE_CONFIG] Device configuration file [LANGUAGE] Downloadable language files (more than one can be specified in

each section) [FW] Firmware image [DIALING_PLAN] Dialing plan [TONES] Downloadable tones (.wav files)

Provisioning is performed using the commands in the 1140eSIP.cfg conﬁguration ﬁle. The conﬁguration ﬁle can have multiple sections.

Note: The maximum length of a line item in the conﬁguration ﬁle is 80 characters. If a line item with more than 80 characters is encountered when parsing the conﬁguration ﬁle, the remaining portion of the ﬁle following that line item will be ignored.

’#’ is used to indicate a comment. Anything preceeding a ’#’ is a comment.

Each section in the conﬁguration ﬁle deﬁnes rules for different ﬁle types. A section starts with a [SECTION NAME] to specify rules for each ﬁle type. For example: [FW].

A section is a mandatory ﬁeld. Parsing of download rules for each ﬁle type starts with ﬁnding this key word. Currently, the following sections are supported by the IP Phone 1140E with SIP Firmware:

•

[FW] section for the ﬁrmware load download

•

[DEVICE_CONFIG] section for the device conﬁguration

•

[DIALING_PLAN] section for the dialing plan ﬁles

•

[LANGUAGE] section for the language prompts ﬁles

•

[TONES] section for the downloadable tone ﬁles

Firmware [FW] image ﬁles originate from Nortel only and are authenticated during ﬁrmware download. If the FW authentication fails, the IP Phone 1140E displays an error message and continues operation with the existing FW image.

Device conﬁguration ﬁles are used to set various parameters in the IP Phone 1140E.

Dialing plan ﬁles are used for conﬁguring dialing patterns and the format of originated URIs in the SIP message.

Note: Some call servers do not yet support SIP URI dialing.

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Create the SIP provisioning ﬁle on the provisioning server 29

Language ﬁles are simple text ﬁles containing all text prompts used by the IP Phone 1140E. Language ﬁles are used for the localization of the IP Phone 1140E without ﬁrmware upgrade. Each language ﬁle has a header that contains a ﬁrmware load version with which this ﬁle is associated. Language ﬁles are signed by Nortel and are authenticated by the ﬁrmware for security reasons.

Tones ﬁles are standard in the Telecommunications Standardization sector of the International Telecommunications Union (ITU-T). The set supports custom tone ﬁles. The tone ﬁles must be WAV ﬁles with the following speciﬁcation: A-law or u-law (8.0 kHz, 8-bit, mono or 16.0 kHz, 16 bit mono). The WAV ﬁles can be created and downloaded to the IP Phone 1140E. These ﬁles are not authenticated by the IP Phone 1140E.

Mandatory keywords in the Provisioning ﬁle are:

•

VERSION [xxxxxx], where xxxxxx is a six- to ten-digit number

representing the version of the ﬁle on the server. The version of the module is speciﬁed in this ﬁeld. The command is used for version comparison in AUTO mode. VERSION is mandatory for all sections. In the FW section, the ﬁrmware version of the load located on the provisioning server must be entered in this ﬁeld. For all other sections, VERSION is just a counter that can be incremented if it is necessary to download a new ﬁle version.

CAUTION

The version number is stored permanently on the IP Phone 1140E until a higher version number is downloaded or until the version number is deleted using the Srvcs, System, Erase User Data menu selection on the IP Phone 1140E. This prevents a new ﬁle from being downloaded if a lower version number is used in the Provisioning File.

•

DOWNLOAD_MODE [AUTO | FORCED] deﬁnes whether the version

is checked. This command is optional. If this command is not present, AUTO mode is used as the default.

— AUTO - This mode compares the version of the module from the

VERSION ﬁeld and the version of the module version stored in the FLASH memory of the IP Phone 1140E. The ﬁle download is initiated only if the version speciﬁed is higher than the current version stored in the IP Phone 1140E. If the version is not applicable, as in the case of language ﬁles, the date of the ﬁle must be used for the decision.

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30 Conﬁgure the provisioning server

— FORCED - This mode forces the ﬁrmware download process.

FORCED can be used for ﬁrmware downgrade procedures. Note: In FORCED or AUTO DOWNLOAD_MODE, the version

number is overwritten with each ﬁrmware download.

•

FILENAME [ﬁlename] speciﬁes the ﬁle name to be downloaded for

this section. For the language and tone section, the use of multiple ﬁlenames is allowed.

Optional keywords in the Provisioning ﬁle are:

•

PROMPT [YES | NO] is used to indicate if the IP Phone 1140E should

prompt the user for an update before the operation is performed. This command is optional with the default set to NO.

CAUTION

The version number stored in the FLASH is permanent until a higher number is downloaded from the Provisioning ﬁle or you selectSrvcs, System, Erase User Data on the IP Phone 1140E.

— YES - enables the prompt — NO - disables the prompt

•

PROTOCOL [TFTP | FTP | HTTP] deﬁnes the protocol used to download

the ﬁle. The IP Phone 1140E with SIP Firmware supports TFTP, FTP and HTTP protocols for ﬁle download. This command is optional. If it is not present, the default protocol TFTP is used.

If using FTP or HTTP, SRV_USER_NAME and SRV_USER_PASS are also key words. These commands specify the credential used to login to the ﬁle server for ﬁle download. If not present, the protocol default credential is used (no credential for TFTP and HTTP and anonymous with no password for FTP).

•

SERVER_IP [address] allows the IP Phone 1140E to connect to the

speciﬁed IP address or name of the server for which the ﬁle can be downloaded. If the address is not speciﬁed, the SERVER_IP that is used is the same SERVER_IP that is used to download the provisioning ﬁle.

• DELETE_FILES [YES | NO], if present, erases the language and tone ﬁles stored in the IP Phone 1140E before new ﬁles are downloaded. Otherwise, new ﬁles with different names are added without erasing existing ﬁles. This command is optional. Note that there is a hard limit of 5 language ﬁles and 5 tone ﬁles that can be stored in the IP Phone

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