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Security Features

RN-001029-00, Rev 03, Release 2.1

IP Phone Release Notes 2.1

Configuring TLS Using Configuration Files

You use the following parameters to configure TLS in the configuration files:

•

sip transport protocol

•

sips persistent tls

•

sips root and intermediate certificates

•

sips local certificate

•

sips private key

•

sips trusted certificates

Parameter

–

sip transport protocol

Transport Protocol

(in Web UI)

Aastra Web UI

Advanced Settings->Global SIP->
Advanced SIP Settings

Configuration Files

aastra.cfg, <mac>.cfg

Description

The protocol that the Real-Time Transport Protocol (RTP) port on the IP
phone uses to send out SIP signaling packets.

Notes

If you set the value of this parameter to 4 (TLS), the phone checks

to see if the “

sips persistent tls

” is enabled. If it is enabled, the phone

uses Persistent TLS on the connection. If “

sips persistent tls

” is

disabled, then the phone uses TLS on the connection. If TLS is used,
you must specify the Root and Intermediate Certificates, the Local
Certificate, the Private Key, and the Trusted Certificates.

If the phone uses Persistent TLS, you MUST specify the Trusted

Certificates; the Root and Intermediate Certificates, the Local
Certificate, and the Private Key are optional.

Format

Integer

Default Value

1 - UDP

Range

Valid values are:
0 - User Datagram Protocol (UDP) and

Transmission Control Protocol (TCP)

1 -  UDP
2 -  TCP
4-  Transport Layer Security (TLS)

Example

sip transport protocol: 4

Содержание 53I

Страница 1: ...Release Note Release 2 1 SI SIP I IP PHONE PHONE 53i 55i 57i and 57i C 53i 55i 57i and 57i CT RN 001029 00 Rev 03...

Страница 2: ...awful use While every effort has been made to ensure accuracy Aastra Telecom will not be liable for technical or editorial errors or omissions contained within this documentation The information conta...

Страница 3: ...ys 53i 55i 12 Changing Expansion Module Programmable Keys to Speeddial Keys 53i 13 Changing Softkeys to Speeddial Keys 55i 57i 57i CT 13 Changing Expansion Module SoftKeys to Speeddial Keys 55i 57i 57...

Страница 4: ...tation 45 Sylantro Interoperability Features 46 Multi Stage Digit Collection Billing Codes Support for Sylantro Servers 46 Billing Codes Implementation Notes 46 Mandatory versus Optional Billing Codes...

Страница 5: ...nfiguration Files 85 Missed Call Summary Subscription 92 Configuring Missed Call Summary Subscription using the Configuration Files 93 Configuring Missed Call Summary Subscription using the Aastra Web...

Страница 6: ...tric UDP Signaling Support 109 Configuring Symmetric UDP Signaling Using Configuration Files 110 Ability to Remove UserAgent and Server SIP Headers 111 Configuring UserAgent Server SIP Headers 111 Iss...

Страница 7: ...one Installation Guide and the SIP IP Phone User Guide For detailed information about more advanced features see the SIP IP Phone Administrator Guide Topics in this release note include General Inform...

Страница 8: ...3i 55i 57i 57i CT Bootloader Requirements This release of firmware is compatible with the following Aastra IP portfolio product bootloader versions 53i Bootloader 2 0 1 1055 or higher 55i Bootloader 2...

Страница 9: ...ge 16 Mexico Tone Set Added to the IP Phones page 19 Customizable Callers List and Services Keys page 20 Configuration Parameters No Longer Case Sensitive page 21 Deployability Features Server and Pro...

Страница 10: ...Single or All Lines page 98 Support For Delay before Auto Answer page 100 SIP Asserted Identity for Sylantro Servers page 101 Whitelist Proxy Support for Sylantro Servers page 102 BLA Support for Thir...

Страница 11: ...Phone now supports the optional 536M Expansion Module previously only supported on the 55i 57i and 57i CT This module adds 36 additional softkeys to the IP phone The 536M provides paper labels for ea...

Страница 12: ...odule previously only supported on the 57i and 57i CT This module adds 60 additional softkeys to the IP phone using the 3 function keys on the bottom right of the unit The 560M module provides an LCD...

Страница 13: ...n renamed Generic SIP Mode Options Menu For Aastra IP Phones operating in SIP mode the Options Menu Submenus and Options available in Release 2 1 are as follows 1 Call Forward 1 Cfwd Number 53i 2 Cfwd...

Страница 14: ...AN Port 3 PC Port 4 Firmware Info 4 User Password 5 Administrator Menu Admin Menu for 53i 1 Configuration Server Config Server for 53i 1 Download Protocol 2 TFTP Settings 1 Primary TFTP 2 Alternate TF...

Страница 15: ...6 NAT Settings 1 Nortel NAT 2 Static NAT 1 NAT IP 2 NAT SIP Port 3 NAT RTP Port 3 UPnP 7 VLAN Settings 1 VLAN Enable 2 Phone VLAN 1 Phone VLAN ID 2 VLAN Priority 1 SIP Priority 2 RTP Priority 3 RTCP P...

Страница 16: ...Authentic Name 10 Password 11 RTP Port Base 55i 57i and 57iCT IP Phones 1 Proxy IP Port 2 Registrar IP Port 3 SIP Register 4 User Name 5 Display Name 6 Screen Name 7 Authentication Name 8 Password 9...

Страница 17: ...Usability Features RN 001029 00 Rev 03 Release 2 1 11 5i Series IP Phone Release Notes 11 RTP Port Base 4 Factory Default 5 Erase Local Config Erase Local Cfg for 53i 6 Restart Phone 7 Phone Lock...

Страница 18: ...ys Changing Programmable Keys to Speeddial Keys 53i 55i Use the following procedure to change an empty programmable key on your IP phone to a Speeddial key Aastra IP Phone UI Step Action 1 Press and h...

Страница 19: ...ogrammable key After a few seconds the IP Phone UI prompts you to assign a number for the Speeddial key 2 Enter the extension number for the Speeddial key then press Save 3 Select a line number then p...

Страница 20: ...line or use the key pad to select a number 1 9 or use the arrow keys to make your selection 5 Press Save to save your changes The softkey key now functions as a Speeddial key If you look at the IP Pho...

Страница 21: ...different line on which to apply the Speeddial key press the Change softkey and select a different line or use the key pad to select a number 1 9 or use the arrow keys to make your selection 5 Press S...

Страница 22: ...It will then forward the call according to the rule configured The phone can only transfer the currently active call or accept transferred calls if there is no active calls If call waiting is disabled...

Страница 23: ...e and the user is on a call any further incoming calls will receive busy unless Call Forward Busy or Call Forward No Answer and Busy is configured on the phone It will then forward the call according...

Страница 24: ...lowing parameter to enable or disable call waiting on the phone using the Aastra Web UI Aastra Web UI 1 Click on Basic Settings Preferences General 2 The Call Waiting field is enabled by default To di...

Страница 25: ...en you configure the country s tone set the country specific tone is heard on the phone for the following dial tone secondary dial tone ring tone busy tone congestion tones call waiting tone ring cade...

Страница 26: ...ers List and Services Keys You use the following parameters to customize the Callers List and Services function Parameter services script Configuration Files aastra cfg mac cfg Description Allows you...

Страница 27: ...Previously the configuration parameters an Administrator entered in the configuration files were case sensitive and had to be entered exactly the way they appeared in the IP Phone Administrator s Gui...

Страница 28: ...supporting the IP address of a TFTP server in this field the phone now supports a URI format for specifying the other configuration server types Your DHCP server configuration file such as the dhcpd...

Страница 29: ...strator Guide FTP ftp user password ftpserver option tftp server name ftp 192 168 1 45 option tftp server name ftp ftpsvr example com for anonymous user option tftp server name ftp userID password ftp...

Страница 30: ...negotiate an encryption algorithm and cryptographic keys before data is exchanged TLS requires the use of specific security certificate files to perform TLS handshake Root and Intermediate Certificat...

Страница 31: ...tbound proxy port parameters be configured in either the configuration files or the Aastra Web UI Advanced Settings Global SIP Basic SIP Network Settings There can be only one persistent TLS connectio...

Страница 32: ...s to send out SIP signaling packets Notes 1 If you set the value of this parameter to 4 TLS the phone checks to see if the sips persistent tls is enabled If it is enabled the phone uses Persistent TLS...

Страница 33: ...use the same authenticated connection This significantly reduces the delay time when placing a call Notes 1 Persistent TLS requires the outbound proxy server and outbound proxy port parameters be con...

Страница 34: ...and zero or more intermediate certificates which must be placed in order of certificate signing with root certificate being the first in the file If the local certificate is signed by some well known...

Страница 35: ...les to use on your IP phone contact Aastra Technical Support Format file name pem Default Value N A Range N A Example sips local certificate phonesLocalCert pem Parameter sips private key Private Key...

Страница 36: ...e s trusted list must contain the CA root certificates for all the servers it is connecting to For example if the phone is connecting to server A which has a certificate signed by CA1 and server B whi...

Страница 37: ...le names that you want the phone to use Use the following procedure to configure TLS using the Aastra Web UI Aastra Web UI 1 Click on Advanced Settings Global SIP Advanced SIP Settings 2 In the Transp...

Страница 38: ...Security Features 32 RN 001029 00 Rev 03 Release 2 1 IP Phone Release Notes 2 1 4 Click on Advanced Settings TLS Support Aastra Web UI...

Страница 39: ...CA root certificates for all the servers it is connecting to For example if the phone is connecting to server A which has a certificate signed by CA1 and server B which has a certificate signed by CA2...

Страница 40: ...cured RTP calls If the receiving phone is not SRTP enabled it sends non secured RTP calls instead SRTP Only IP phone generates and accepts RTP secured calls only all other calls are rejected fail An A...

Страница 41: ...meter sip lineN srtp mode Global Parameter Parameter sip srtp mode Aastra Web UI Advanced Settings Global SIP RTP Settings Configuration Files aastra cfg mac cfg Description This parameter determines...

Страница 42: ...Files aastra cfg mac cfg Description This parameter determines if SRTP is enabled on this line as follows If set to 1 then use the global setting for this line This is the default setting If set to 0...

Страница 43: ...ine basis Use the following procedure to configure SRTP using the Aastra Web UI Aastra Web UI Global Configuration 1 Click on Advanced Settings Global SIP RIP Settings 2 Set the RTP Encryption field t...

Страница 44: ...Settings Line 1 9 RTP Settings 2 Set the RTP Encryption field to one of the following settings SRTP Disabled IP phone generates and receives nonsecured RTP calls on this line SRTP Preferred IP phones...

Страница 45: ...cript when the user exits the XML screens the screens are destroyed A new feature in Release 2 1 allows specific text screens to redisplay for redirection to a new page by using the doneAction attribu...

Страница 46: ...his example displays text that you can scroll through on the LCD screen As you scroll the screen and then press DONE 55i 57i 57i CT or the RIGHT ARROW key 53i the screen redirects you to the location...

Страница 47: ...ure For a 53i an Administrator can use the allowAnswer attribute with the AastraIPPhoneTextScreen XML object Valid values for the allowAnswer attribute are yes or no default For 55i 57i and 57i CT The...

Страница 48: ...me time it receives an XML application XML applications are destroyed if the phone receives a call after the XML has been rendered When the Ignore Answer line displays you can press the Right Arrow ke...

Страница 49: ...Title Screen Object Title Text The screen object can be implemented similar to the firmware info screen Note that white space is preserved in XML so the display should word wrap appropriately Only th...

Страница 50: ...he server must include the list of characters in the URI field of the XML softkey script The URI must be in the format SymbolList Symbol List content The content of the Symbol List must be encapsulate...

Страница 51: ...y Example AastraIPPhoneInputScreen type IP Title Email Title SoftKey index 1 Label Symbols Label URI SoftKey SymbolList URI SoftKey SoftKey index 2 Label Backspace Label URI SoftKey Exit URI Softkey S...

Страница 52: ...e prompted to enter the correct billing code when they dial these numbers External numbers Eternal numbers dialed using a Speeddial key Billing Codes Implementation Notes Note the following implementa...

Страница 53: ...codes if the user is configuring a Speeddial number then they enter the number using the following format phonenumber 23 billingcode To use this format with the default dial plan terminator the sign...

Страница 54: ...by Sylantro as a delimiter should be represented as an escaped character by using the sequence 23 The speed dial format for an external number that includes an optional billing code becomes 50 billing...

Страница 55: ...multiple incoming calls simultaneously the IP Phone UI displays a list of incoming calls You select a call from this list and are connected to the call When you configure a GCP softkey you specify the...

Страница 56: ...le Keys Type Operation Expansion Module N Type Configuration Files aastra cfg mac cfg Description Configures a new softkey that functions as a Directed Call Pickup DCP or Group Call Pickup GCP key For...

Страница 57: ...ckup using the Aastra Web UI Aastra Web UI 1 Click on Operation Softkeys and XML 2 Select a key for which to configure Directed Call Pickup 3 In the Type field select Directed Call Pickup 4 In the Lab...

Страница 58: ...ra Web UI Note A ring group must be configured on the Sylantro Server in order for a GCP softkey to function Aastra Web UI 1 Click on Operation Softkeys and XML 2 Select a key for which to configure G...

Страница 59: ...llotted then the IP phone begins to dial the number By default the Autodial feature functions as a hotline If you want Autodial to function as a warmline you can use the Autodial time out parameter to...

Страница 60: ...ation sip lineN autodial number sip lineN autodial timeout AutoDial Global Configuration Parameter sip autodial number Autodial Number in Web UI Aastra Web UI Advanced Settings Global SIP Autodial Set...

Страница 61: ...e waits the specified number of seconds before dialing the preconfigured number warmline when you lift the handset Default is 0 hotline Format Integer Default Value 0 Range 0 to 120 Examples sip autod...

Страница 62: ...time in seconds that the phone waits to dial a preconfigured number after the handset is lifted from the IP phone cradle If this parameter is set to 0 hotline the phone immediately dials a preconfigu...

Страница 63: ...phone using the Aastra Web UI By default your IP phone uses the global settings you specify for Autodial for all lines on your IP phone However you can also configure Autodial on a per line basis Aas...

Страница 64: ...ime for the IP phone to wait before dialing the number enter the length of time in seconds For example 30 4 Click to save your changes Per Line Configuration 1 Click on Advanced Settings Line 1 9 Auto...

Страница 65: ...lank then disable Autodial on this line If set to a valid SIP number dial the SIP number specified for this line For example 8500 4 In the Autodial Timeout field specify a value for the timer for this...

Страница 66: ...ce together extensions 2005 2011 and 2021 When an IP phone user is connected to multiple conference calls some outbound proxies have maximum call hold time set from 30 90 seconds After this time the c...

Страница 67: ...able centralized conferencing leave this field empty blank To enable SIP centralized conferencing then do one of the following actions If you have specified a proxy server registrar server then to rea...

Страница 68: ...g actions If you have specified a proxy server registrar server then to reach the media server via the proxy server set this field to one of the following conf Sylantro server or Conference Broadsoft...

Страница 69: ...ble SIP centralized conferencing on the IP phone do one of the following actions If you have specified a proxy server registrar server then to reach the media server via the proxy server set this fiel...

Страница 70: ...SIP centralized conferencing on this line do one of the following actions If you have specified a proxy server registrar server then to reach the media server via the proxy server set this field to on...

Страница 71: ...ailable by default When the IP phone user is ready to receive calls from the server the user logs into a queue Depending on the server configuration the IP phone is either in an unavailable or availab...

Страница 72: ...ing the ACD Auto Available Timer Whenever the IP phone user answers a call or misses a call the server automatically changes the phone s status to unavailable The administrator can control how long th...

Страница 73: ...A sample configuration file is shown below softkey1 type acd softkey1 label sales softkey1 line 1 softkey1 states idle In addition to the above parameters you can also use the following parameters to...

Страница 74: ...meter to acd Format Text Default Value none Default Range See the IP Phone Administrator s Guide Example softkey1 type acd Parameters softkeyN label Auto Call Distribution in Web UI Aastra Web UI Oper...

Страница 75: ...key you are configuring For example 1 Format Integer Default Value 1 Range 1 through 9 Example softkey1 line 1 Parameters softkeyN states Auto Call Distribution in Web UI Aastra Web UI Operation Softk...

Страница 76: ...er to acd Format Text Default Value none Default Range See the IP Phone Administrator s Guide Example topsoftkey1 type acd Parameters topsoftkeyN label Auto Call Distribution in Web UI Aastra Web UI O...

Страница 77: ...you are configuring For example 1 Format Integer Default Value 1 Range 1 through 9 Example topsoftkey1 line 1 Parameters topsoftkeyN states Auto Call Distribution in Web UI Aastra Web UI Operation So...

Страница 78: ...e Keys Configuration Files aastra cfg mac cfg Description Defines the type of programmable key for this key To configure an ACD programmable key set this parameter to acd Format Text Default Value N A...

Страница 79: ...Description Defines the key type on the expansion module Applicable expansion modules include the 536M and 560M To configure an ACD expansion module key set this parameter to acd Format Text Default V...

Страница 80: ...llowing procedure to configure an ACD softkey programmable key or expansion module key using the Aastra Web UI This procedure uses the 57i IP phone as an example Aastra Web UI 1 Click on Operation Sof...

Страница 81: ...eld specify a name for this ACD softkey The Label helps identify which queue you are subscribing to when you login This field does not apply to the 53i For example Support 4 In the Line field select t...

Страница 82: ...onfiguration Files aastra cfg mac cfg Description Enables the ACD timer to automatically reset the IP phone status to available Set to 0 Off Set to 1 On Format Binary Default Value 0 disable Range 0 d...

Страница 83: ...ure to configure an ACD auto available timer using the Aastra Web UI Aastra Web UI 1 Click on Basic Settings Preferences Auto Call Distribution Settings 2 In the Auto Available check box click Enabled...

Страница 84: ...to log into the Customer Support phone queue The administrator assigns the label Support to the softkey so it is easily recognizable to the IP phone user When the IP phone user wants to subscribe to...

Страница 85: ...ble to take calls The icon changes again when you are busy with an active call The table below describes the meaning of the LED and each icon as they may appear on your IP phone Phone Model Status Log...

Страница 86: ...eck with your administrator to verify the label assigned to the ACD softkey on your IP phone The login screen see below appears In this example the ACD softkey accesses the Customer Support phone queu...

Страница 87: ...eceiving calls To temporarily stop receiving calls you can switch the IP phone status to unavailable While you are on a call or miss a call that has been distributed to your IP phone your IP phone sta...

Страница 88: ...er will begin to distribute phone calls from this queue to your IP phone If your IP phone status remains unavailable after you log in then you must manually change the state to available in order to s...

Страница 89: ...uration the phone applies an existing configuration Outgoing Intercom Settings Line default is Line 1 to this line in preparation for placing the intercom call For example an outgoing intercom call ca...

Страница 90: ...tercom call If Auto Answer is enabled the phone automatically answers an incoming intercom call If Play Warning Tone is also enabled the phone plays a tone to alert the user before answering the inter...

Страница 91: ...Use the following parameters to configure Intercom Auto Answer and Barge In via the configuration files Outgoing Intercom sip intercom type sip intercom line Incoming Intercom sip allow auto answer s...

Страница 92: ...Phone Side Server Side Off For Configuration Files 1 Phone Side 2 Server Side 3 Off Example sip intercom type 1 Parameter sip intercom line Line in Web UI Aastra Web UI Basic Settings Preferences Out...

Страница 93: ...swering the intercom call If auto answer is disabled the phone rejects the incoming intercom call and sends a busy signal to the caller Format Boolean Default Value 1 true Range 0 false do not allow a...

Страница 94: ...b UI Aastra Web UI Basic Settings Preferences Incoming Intercom Settings Configuration Files aastra cfg mac cfg Description Enable or disables how the phone handles incoming intercom calls while the p...

Страница 95: ...e Aastra Web UI Use the following procedure to configure Intercom Auto Answer and Barge In using the Aastra Web UI Aastra Web UI 1 Click on Operation Programmable Keys 2 In the Type field select the I...

Страница 96: ...fault is Off 3 If Server Side is selected enter a prefix to add to the phone number in the Prefix Code field Note For Sylantro servers enter 96 4 If Phone Side or Server Side is selected select a line...

Страница 97: ...usy signal to the caller 3 The Microphone Mute field is enabled by default The microphone is muted on the IP phone for Intercom calls made by the originating caller To disable this field uncheck the b...

Страница 98: ...re to work you must configure voicemail on the phone that the call was initially directed to For example phones A B and C are connected to the server You configure the server to direct calls coming in...

Страница 99: ...onfigure the amount of time in seconds that the phone uses this feature The timer is configurable on a global basis only Use the following parameters to configure Missed Call Summary Subscription feat...

Страница 100: ...in the missed calls indicator on the phone it was initially directed to For example phones A B and C are connected to the server You configure the server to direct calls coming into phone B which has...

Страница 101: ...ssed Call Summary Subscription in Web UI Aastra Web UI Advanced Settings Global SIP Advanced SIP Settings Configuration Files aastra cfg mac cfg Description Enables or disables the Missed Call Summary...

Страница 102: ...1 Click on Advanced Settings Global SIP Advanced SIP Settings 2 The Missed Call Summary Subscription field is disabled by default To enable this field check the box This feature allows missed calls t...

Страница 103: ...Settings Line N Advanced SIP Settings 2 The Missed Call Summary Subscription field is disabled by default To enable this field check the box This feature allows missed calls that have been redirected...

Страница 104: ...iles Use the following parameter to configure MWI for a single line or for all lines on the phone using the configuration files mwi led line Parameter mwi led line Message Waiting Indicator Line in We...

Страница 105: ...he phone using the Aastra Web UI Aastra Web UI 1 Click on Basic Settings Preferences General 2 In the Message Waiting Indicator Line field select a single line from 1 to 9 or select All for all lines...

Страница 106: ...call is auto answered If this value of the delay parameter set to 0 delay 0 then an incoming call is immediately auto answered The absence of the parameter is considered as ring forever In order for t...

Страница 107: ...s of the P Asserted Identity PAI header field and displays it on the phone UI This field contains a more accurate description of the caller identity extension phone number than is contained in the SIP...

Страница 108: ...iguring Whitelist Proxy Support Using Configuration Files You use the following parameter to configure the whitelist proxy feature in the configuration files sip whitelist Parameter sip whitelist Whit...

Страница 109: ...the following procedure to configure the whitelist proxy feature using the Aastra Web UI Aastra Web UI 1 Click on Advanced Settings Global SIP Advanced SIP Settings 2 The Whitelist Proxy field is disa...

Страница 110: ...primary appearance as a BLA then there is no need for third party registration When configuring the BLA feature on a per line basis for third party registration and subscription the third party name m...

Страница 111: ...lice phone number sip line2 bla number 4085582868 sip line2 display name Alice sip line2 screen name Alice Alice s configuration is as follows line 1 sip line1 auth name 4085582868 sip line1 password...

Страница 112: ...on page 60 Support for the SIP UPDATE Message This release of the Aastra IP phones supports the SIP UPDATE message as specified in RFC3311 Support for SIP Server Blacklist The server blacklist feature...

Страница 113: ...on Blacklist Duration Aastra Web UI Aastra Web UI Advanced Settings Global SIP Settings Advanced SIP Settings Configuration Files aastra cfg mac cfg Description Specifies the length of time in seconds...

Страница 114: ...erver blacklist using the Aastra Web UI Aastra Web UI 1 Click on Advanced Settings Global SIP Advanced SIP Settings 2 In the Blacklist Duration field specify the length of time in seconds that a faile...

Страница 115: ...ra IP phones use symmetric UDP signaling for outgoing UDP SIP messages When symmetric UDP is enabled the IP phone generates and listens for UDP messages using port 5060 This release allows you to manu...

Страница 116: ...ling Parameter sip symmetric udp signaling Configuration Files aastra cfg mac cfg Description Allows you to enable or disable the phone to use port 5060 to send SIP UDP messages The value 1 which is t...

Страница 117: ...e the addition of the User Agent and Server SIP headers from the SIP stack An Administrator can configure this feature using the configuration files only Configuring UserAgent Server SIP Headers You u...

Страница 118: ...eader in SIP messages DEF04273 57i CT Unanswered outbound call CANCEL is now sent correctly after expiry of m_ringtimer DEF05136 Directory and Callers keys LED now light up when you enter these screen...

Страница 119: ...nswer and Ignore keys are now displayed when using a formatted text screen BroadSoft Interop DEF05137 SCA Phone no longer incorrectly seizes a second line when the first seize failed DEF05144 SCA Simu...

Страница 120: ...600 Busy Everywhere responses for an outgoing call as a busy indication rather than a failed call DEF04481 VLAN tagged ARP packets now get to Port 1 as expected DEF04982 Early media call now works cor...

Страница 121: ...se 2 1 115 5i Series IP Phone Release Notes Contacting Aastra Telecom Support If you ve read this release note and consulted the Troubleshooting section of your phone model s manual and still have pro...

Страница 122: ......

Страница 123: ......

Страница 124: ...ject to change without notice Aastra Telecom assumes no responsibility for any errors that may appear in this document Product capabilities described in this document pertain solely to Aastra Telecom...

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