To forward calls on an AT&T SB35020 phone:

1. Access the Admin Settings menu.
2. Navigate to the "Fwd/Trans to line" option.
3. Use the arrow keys to select "Enabled" or "Disabled."
4. Press "Save" to confirm the setting.

Note: If call forwarding to an outside line is disabled, you cannot forward calls to external numbers. You can choose to forward calls to voicemail, a specific extension, or an outside phone number if allowed.

This answer is automatically generated

kris Lang

April 16, 2025

I cannot get the Do not disturb off of the phone systerm SYN248 land line

Summary of Contents for AT&T Syn248 SB35020

Page 1 ® User’s Guide AT&T SB35020/SB35025 Deskset © 2012–2013 Advanced American Telephones. All Rights Reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property licensed to Advanced American Telephones, San Antonio, TX 78219. Syn248® is a registered trademark of Advanced American Telephones. Issue 7.0 09/13...
Page 2: Table Of Contents
Syn248 SB35020/SB35025 Deskset User’s Guide ONTENTS Preface ......................6 Additional Documentation ..........................6 Topic Navigation ..............................7 Text Conventions ..............................7 Overview......................8 Syn248 System Overview........................... 9 Deskset Overview..........................9 Deskset Description............................10 Deskset Hard Keys ..........................11 Lines and Line Keys............................12 Setting Your Password............................
Page 3 Syn248 SB35020/SB35025 Deskset User’s Guide Answering a Call..............................29 Ignoring a Call............................... 30 Intercom Auto Answering ..........................31 Call Forward–No Answer..........................32 About the Auto Attendant ..........................32 Caller Options ............................32 Call Management ..................33 Call Management..............................34 Putting a Call on Hold ............................35 Transferring a Call...............................
Page 4 Syn248 SB35020/SB35025 Deskset User’s Guide Call Log ......................65 Using the Call Log .............................. 66 Managing Missed Calls............................67 Listening to Voicemail From the Call Log................68 Storing Call Log Entries............................ 69 Deleting Call Log Entries..........................70 Paging......................71 Sending a Page..............................72 Deskset Settings ...................73...
Page 5 Syn248 SB35020/SB35025 Deskset User’s Guide WebUI..................................112 PC/Deskset Interaction ..........................113 Cordless Headset (SB35025 Only)......................114 Appendixes....................118 Appendix A: Soft Keys .............................118 Appendix B: Technical Specifications ......................120 Appendix C: Maintenance..........................121 Appendix D: Important Safety Instructions...................122 Appendix E: GPL License Information .....................123 Glossary ....................... 124...
Page 6: Preface
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents REFACE This User’s Guide provides instructions for using your Syn248 SB35020/SB35025 Deskset telephone with software version 1.3.1 or newer. See page 89 for instructions on checking the software version on the Deskset. Although the Quick Start Guide also includes information on using the Deskset, this guide has setup information and more details about feature usage.
Page 7: Topic Navigation
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Topic Navigation This Syn248 SB35020/SB35025 Deskset User’s Guide features easy navigation between topics and the ability to return to your original topic. Bold text in blue Text in blue indicates a link to another section of the document.
Page 8: Overview
This chapter introduces the SB35020/SB35025 Deskset and provides an overview of the Syn248 system and the external features of the Deskset.
Page 9: Syn248 System Overview
= audio Figure 1. Sample Syn248 System Deskset Overview The SB35020 Deskset and SB35025 Deskset have identical external front-panel features, call features, and basic settings. The SB35025 Deskset has a built-in DECT 6.0 radio to host an optional cordless headset, and an auxiliary input/output port for connecting a Music on Hold (MoH) source and an overhead paging system.
Page 10: Deskset Description
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deskset Description The key external features of the Deskset are shown in Figure 2 and described in Table 2. Figure 2. Deskset Layout Table 2 Deskset Features 1. Liquid Crystal Display (LCD) Provides controls and information for using the Deskset.
Page 11: Deskset Hard Keys
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deskset Hard Keys The hard keys include the standard telephone dial-pad keys and a set of function keys. The Deskset hard keys are shown in Figure 3 and described in Table 3.
Page 12: Lines And Line Keys
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Lines and Line Keys The system administrator can configure your Deskset with up to 8 lines on which you can make and receive external calls. Each line is assigned to a programmable feature key on the Deskset.
Page 13: Soft Keys
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Soft Keys Soft keys are a set of three context-sensitive keys that provide functions based on what you are doing on the Deskset. The top example as illustrated in Figure 5 shows the soft key labels on the active call screen.
Page 14: Deskset Status Indicators
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deskset Status Indicators Status indicators appear in the upper right-hand corner of the Deskset display, as shown in Figure 6 and as described in Table 4. Status Indicator Area Figure 6. Sample Status Indicator...
Page 15: Call Indicators
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Call Indicators When the Deskset has an incoming, ongoing, or held call, information about the call appears on the display. The Deskset screen displays one call at a time. When you have multiple calls, you can access each call by pressing its Line key.
Page 16: Call Status Icons
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Call Status Icons Table 6 shows and describes the call status icons. The number beside an icon indicates the number of the associated Line key. Table 6 Call Status Icons Icon Status...
Page 17: Programmable Feature Keys
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Programmable Feature Keys The Deskset has ten programmable feature keys as shown in Figure 2 on page 10. Key 10 (bottom) is an Intercom key, and is not programmable. Press this key to call another extension.
Page 18: Programmable Feature Key Leds
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Programmable Feature Key LEDs The programmable feature keys have two-color LEDs to signal the status of some functions. The LED flash patterns indicate call and feature status as described in Table 8.
Page 19: Dial-Pad Entry
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Dial-Pad Entry Use the dial-pad keys to enter letters and numbers into a text field. Keys 2, 3, 4, 5, 6, and 8 have three assigned letters, while keys 7 and 9 have four assigned letters, as shown in Figure 8.
Page 20: Using The Speakerphone
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Using the Speakerphone When the speakerphone is active, the (SPEAKER) key is lit. To use the speakerphone: 1. To start a call, press . The key becomes backlit and you hear a dial tone. Begin dialing.
Page 21: Making Calls
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R AKING ALLS The Deskset provides several methods for making a call. If the Deskset is idle or has calls on hold, you can predial a phone number and then go off hook to call the number. You can make a call at any time by choosing an off-hook method, then dialing a number.
Page 22: Active Call Screen
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Active Call Screen The active call screen, as shown in Figure 9, appears while you are on a call. Call Timer Called Phone Call Status Icon Number and Line Key Number Figure 9. Active Call Screen Table 9.
Page 23: Predialing
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Predialing Predial is only available when the Deskset is idle or when all calls are on hold. In predial mode, there is no dial tone. You can only predial one phone number at a time.
Page 24: Making A Call From A List
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Making a Call from a List To make a call from a list: 1. Access the desired list entry. For example, to view the Directory, press (MENU), then 1, and then 5. The Directory screen appears. See “Accessing Items in Lists”...
Page 25: Making An Intercom Call
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Making an Intercom Call To make an internal (extension-to-extension) call, you must use the intercom line. You can access the intercom line by pressing the Intercom key. By default, key 10 is an Intercom key, as shown in Figure 10, but your system administrator can configure additional Intercom keys to give you more intercom lines.
Page 26: Making Calls With An Optional At&T Dect Cordless Headset (Sb35025 Only)
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Making Calls with an Optional AT&T DECT Cordless Headset (SB35025 Only) If you have an optional AT&T DECT cordless headset registered to your SB35025 Deskset, then you can make calls with the headset. Use the Deskset dial pad to dial the number.
Page 27: Answering Calls
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R NSWERING ALLS When a call comes in, the Deskset rings and the incoming call information appears as shown in Figure 11 on page 28. The screen displays the caller’s name and number (if available).
Page 28: Incoming Call Screen
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Incoming Call Screen The incoming call and active call screens are shown in Figure 11. Press Answer or lift handset Incoming Call Active Call Figure 11. Incoming Call and Active Call Table 10. Incoming Call Screen Soft Keys Description Answers incoming call.
Page 29: Answering A Call
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Answering a Call To answer a call: To answer an incoming call, do one of the following: Lift the handset.  Press to answer using the Preferred Audio method. See “Preferred ...
Page 30: Ignoring A Call
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Ignoring a Call You can ignore an incoming call by pressing to silence the ringer. The silenced Ignore ringer icon appears. If you are on an active or held call, after the incoming call has been ignored, the screen returns to the call you were on before the incoming call.
Page 31: Intercom Auto Answering
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Intercom Auto Answering You can set your Deskset to answer intercom calls automatically, without your having to touch the phone to answer. When you enable Intercom Auto Answer, ANS appears at the top of the Deskset screen as shown in Figure 13 unless DND is active, since Auto Answer is disabled when DND is on.
Page 32: Call Forward-No Answer
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Call Forward–No Answer Call Forward–No Answer is a setting that redirects incoming calls. The Syn248 system has two types of Call Forward–No Answer settings. Phone Line Call Forward–No Answer can only be set by the system administrator.
Page 33: Call Management
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R ANAGEMENT This chapter describes the call management features of the Deskset. The Deskset enables you to put calls on hold, transfer calls, and create conference calls.
Page 34: Call Management
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Call Management Call management begins with the active call screen shown in Figure 14. The Call Status icons are described in “Call Status Icons” on page Figure 14. Active Call Screen Table 11 Active Call Screen Description Description Begins transfer of a call.
Page 35: Putting A Call On Hold
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Putting a Call on Hold All Desksets that share assigned lines can view held calls and take calls off hold. To hold calls and manage held calls: 1. When you are on an active call, press the (HOLD) button.
Page 36: Transferring A Call
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Transferring a Call You can transfer an active call to: an internal extension  an outside number, if this function has been enabled by your system administrator  another extension‘s voicemail, or your personal voicemail.
Page 37: Making A Conference Call
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Making a Conference Call You can set up a conference call with yourself and two telephone numbers (either internal, outside, or with both). To make a conference call: 1. Press from an active call screen. The call is automatically put on hold and Conf the Conference Setup screen appears.
Page 38: Putting A Conference On Hold
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Putting a Conference on Hold To put a conference on hold: 1. Press (HOLD). The other callers can continue communicating with each other. The held conference icon indicates a held conference. is unavailable during an active call if you have another conference on Conf hold.
Page 39: Call Management Using A Headset
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Call Management Using a Headset You can use a corded or cordless headset with the SB35025 Deskset. The SB35020 Deskset works only with a corded headset. The following types of headsets are compatible with Syn248 Desksets: A corded headset that is plugged into the Headset jack on the back of the ...
Page 40: Accessing Items In Lists
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R CCESSING TEMS IN ISTS The Deskset has lists of phone numbers that are used for making calls and for call management. Some of the lists, like the Messages list, have other features associated with them that are explained elsewhere in this guide.
Page 41: Accessing The Extension List
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Accessing the Extension List You can access the Extension List as part of the Directory when the phone is idle. See “Using the Directory” on page 47. When you go off-hook, you can access the Extension List using the soft key that appears.
Page 42: Accessing The Redial List
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Accessing the Redial List The last 20 phone numbers that you dialed are recorded in the Redial list, as shown in Figure 15 and described in Table 12. Number, time and date Figure 15.
Page 43: Deleting Redial Entries
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents store the caller’s number by pressing . The Store Redial Entry screen  Store appears with the number filled in.  If necessary, enter the caller’s first and last names. Press to move the ...
Page 44: Searching The Extension Or Directory Lists
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Searching the Extension or Directory Lists Use the dial pad to get to the first entry that starts with any letter. To search for a list entry: 1. Select a list to search, such as the Directory.
Page 45: Accessing The Held Calls List
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Accessing the Held Calls List When you or anyone else in your office puts an external call on hold, the call is displayed in the Held Calls List. The Held Calls List shows all held calls on all lines in the system, including lines that haven’t been assigned to your Deskset Line keys.
Page 46: Directory
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R IRECTORY The Syn248 system provides three Directory lists. By default, the system displays entries from all three lists. See “To view and call Directory entries:” on page 48 to learn how you can limit this display to one of the three lists.
Page 47: Using The Directory
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Using the Directory Access the Directory by pressing (MENU), then 1, and then 5 to display the screen shown in Figure 16 and described in Table 13. 'LUHFWRU\ *UDKDP %HOO Full name...
Page 48: Viewing And Calling Directory Entries
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Viewing and Calling Directory Entries By default, the Directory screen displays entries from all three Directory lists—Personal, System, and Extension. You can change the Directory settings to view any combination of the lists.
Page 49: Creating A New Personal List Entry
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Creating a New Personal List Entry You can add up to 50 personal entries to the Directory. These personal entries are only visible at your extension. To create a new Personal list entry: 1.
Page 50: Editing A Personal List Entry
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Editing a Personal List Entry You can edit any personal list entry while viewing the Directory. To edit a Personal list entry: 1. Press (MENU), then 1, and then 5. The Directory appears.
Page 51: Deleting A Personal List Entry
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deleting a Personal List Entry You can delete any one of your Personal list entries while viewing the Directory. To delete a Personal list entry: 1. Press (MENU), then 1, and then 5.
Page 52: Storing Directory Entries From The Call Log Or Redial List
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Storing Directory Entries from the Call Log or Redial List To store a Call Log or Redial entry into your Personal list:   1. In the Call Log or Redial list, press to display the desired entry.
Page 53: Sorting Directory Entries
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Sorting Directory Entries The Directory entries are sorted by first or last names. When you use the dial pad to search, the system searches for the names in the sort order. To sort Directory entries: 1.
Page 54: Voicemail
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R OICEMAIL Your Syn248 Deskset records and saves incoming voice messages. The MESSAGE WAITING LED, shown in Figure 17 on page 55, lights up when you have one or more new messages.
Page 55: Voicemail Overview
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Voicemail Overview When there is at least one new message, the MESSAGE WAITING LED lights up, as shown in Figure 17. MESSAGE WAITING LED Figure 17. Message Waiting LED To access your messages, see “Accessing Your Messages”...
Page 56: Setting Up Your Voicemail Greetings
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Setting up Your Voicemail Greetings You can have three different greetings for your voicemail. You can then activate the one that is currently appropriate. You can record a Primary Greeting to use most of the time and an Alternate Greeting for when you are out of the office.
Page 57: Accessing Your Messages
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents To activate a greeting: (MENU), then 2, then 1, and then 1 to display the Voicemail Greetings 1. Press menu.   to highlight the Primary, Alternate, or Pre-Set greeting to be Press ...
Page 58: Message Playback
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Message Playback You can play either a single message or all of your messages. To play a single message:   1. On the Messages screen, press until the desired entry is on the screen.
Page 59: Calling The Messenger
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Calling the Messenger You can call back the person who left the message. To call back the person who left the message:   1. In the Messages list, press until the desired entry is on the screen.
Page 60: Deleting Messages
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deleting Messages You can delete a single message or all messages from the Messages screen. You can also delete a single message during message playback, as described in “Message Playback” on page To delete a single message or all messages: ...
Page 61: New Message Status Indications
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents New Message Status Indications You can add a new message indication ( ) or delete the new message indication from a message. The new message indication disappears after you play a message, but you can mark a message as “new”...
Page 62: Accessing Your Voicemail Remotely
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Accessing Your Voicemail Remotely Remote access allows you to listen to messages or change the recorded greeting when you are away from your Deskset. Follow the voice prompts and press the appropriate dial-pad keys to navigate through the system.
Page 63 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents To access voicemail remotely – listen to messages: Once you have accessed the system, the main menu plays. From this menu you can listen to old or new messages as shown in Figure 19. You have the following options: To listen to new messages, press 1.
Page 64 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents To access voicemail remotely – voicemail greeting setup: 1. To set up the voicemail greeting, access the system and press 8. As illustrated in the flow diagram in Figure 20, you have the following options: To record a primary greeting, press 1.
Page 65: Call Log
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R The Deskset Call Log provides available name and number information for the last 50 calls received. The newest entries replace the oldest. “Using the Call Log” on page 66 ...
Page 66: Using The Call Log
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Using the Call Log The Call Log soft keys, as shown in Figure 21 and described in Table 15, are available whenever the Call Log has at least one entry. Figure 21. Call Log Functions 1.
Page 67: Managing Missed Calls
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents To access the Call Log: 1. Press (MENU), then 1, and then 6. The most recent Call Log entry appears.   2. Press until the desired entry is on the screen.
Page 68: Listening To Voicemail From The Call Log
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Listening to Voicemail From the Call Log If the caller left a message, you can play the message from the Call Log. To play a message from the Call Log:  ...
Page 69: Storing Call Log Entries
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Storing Call Log Entries To store a Call Log entry into your Personal list:   1. From the desired Call Log entry, press to display the soft key. Store 2. Press to store the entry in your Personal list.
Page 70: Deleting Call Log Entries
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deleting Call Log Entries You can delete a single Call Log entry, or all Call Log entries. To delete Call Log entries: 1. From a Call Log entry, press . The displayed entry is removed from the list Delete and the next entry appears.
Page 71: Paging
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R AGING Paging allows you to broadcast what you say to more than one extension. If your system administrator has set up paging zones, you can page all extensions or a zone.
Page 72: Sending A Page
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Sending a Page You can start sending a page from the Paging Zones menu. If your system administrator has set up paging zones, you can page all extensions or a zone. To send a page: 1.
Page 73: Deskset Settings
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R ESKSET ETTINGS You or your system administrator can customize your Deskset at the Deskset using the following menus and features: “Deskset Menu” on page 74 ...
Page 74: Deskset Menu
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deskset Menu You can use the Deskset menus to set up many Deskset features. Access the menu by pressing (MENU), and then select options by highlighting an item and pressing (SELECT), or by pressing the dial-pad key with that option number.
Page 75: Features
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Features Use the Features menu to access the Deskset features, as shown in Figure 22 and described in Table 16. Features Menu 1/3 Features Menu 2/3 Features Menu 3/3 Figure 22. Deskset Features Menu Table 16.
Page 76: User Settings
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents User Settings Use the User Settings menu to set up options as shown in Figure 23 and described in Table 17. User Settings Menu 1/2 User Settings Menu 2/2 Figure 23. User Settings Menu –...
Page 77: Greetings
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Greetings Use the Greetings menu, as shown in Figure 24 and described in Table 18, to record your voicemail greeting message. Figure 24. Greetings Menu – Table 18. User Settings Greetings Menu Function See page...
Page 78: Name Recording
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Name Recording Your name recording should identify yourself to callers. If callers access the Company Directory when unanswered calls are directed to the Auto Attendant, they hear this recording upon entering your name.
Page 79: Intercom Auto Answer
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Intercom Auto Answer You can set the Deskset to automatically answer intercom calls after a delay that you specify. Without touching the Deskset, you can speak to and be heard by people who call you.
Page 80: Deskset Settings
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deskset Settings Use the Deskset Settings menu to set up the display appearance and sounds of your Deskset as listed in Table 19. Deskset Settings Menu 1/2 Deskset Settings Menu 2/2 Figure 25. Deskset Settings Menu Table 19.
Page 81: Display
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Display Use the Display menu to adjust your Deskset LCD screen contrast and backlight. To use the Display menu: 1. Press (MENU), then 2, then 3, and then 1. The Display menu appears.
Page 82: Sounds
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Sounds Use the Sounds menu to set the ring volume, pick one of nine ringtones, or turn key beeps and the call waiting tone on and off. To use the Sounds menu: 1.
Page 83: Volume Settings
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Volume Settings Set the Speaker, Receiver, Headset, and Paging volumes using the Volume Settings menu. You can also adjust each of these settings while you are on a call by pressing the + / –...
Page 84: Preferred Audio Mode
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Preferred Audio Mode When you press a Line key or , the call is answered in the preferred audio mode. Answer Lifting the handset takes first priority in all instances. You can set the audio preferences to Headset or Speaker by using the Preferred Audio menu.
Page 85: Setting, Changing, Or Resetting Your Password
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Setting, Changing, or Resetting Your Password Use the User Password menu to set, change, or reset your password. This setting can also be controlled on the WebUI. To set or change the password: 1.
Page 86: Registering An Optional Cordless Headset (Sb35025 Only)
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Registering an Optional Cordless Headset (SB35025 Only) You can register one AT&T DECT Cordless headset to a SB35025 Deskset. When a Deskset has a cordless accessory, the Deskset and headset are all part of the same extension, and only one device can be used at a time.
Page 87: Deregistering A Cordless Headset
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deregistering a Cordless Headset You must deregister a cordless headset before you can register it to a different Deskset. To deregister a cordless headset: 1. Press (MENU), then 2, and then 6.
Page 88: Admin Settings
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Admin Settings The Admin Settings are determined by your system administrator. Only someone with access to the system administrator’s password can change the Admin Settings. To display the Admin Settings menu: 1. Press (MENU), and then 3.
Page 89: Deskset Information
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deskset Information Use the Deskset Information screen, shown in Figure 26, to find the Deskset's IP Address, which you will need to access the WebUI. The other Deskset information may be used by your system administrator or the installer.
Page 90: Auto-Attendant Settings
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Auto-Attendant Settings If your system administrator has set your extension as the Operator extension, you can use the Deskset to select the Auto Attendant. The Auto Attendant can answer calls during periods when your office is closed or when calls go otherwise unanswered. The Auto Attendant has a voice greeting and an interactive menu to enable callers to reach the desired extension.
Page 91: Web Interface
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R NTERFACE Use an Internet browser to access the Web User Interface (WebUI) that resides on your Deskset. See “Accessing the Web User Interface (WebUI)” on page 92.
Page 92: Accessing The Web User Interface (Webui)
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Accessing the Web User Interface (WebUI) To access the WebUI: 1. Ensure that your computer is connected to the same network as the Syn248 system. In most cases, your computer will already be connected to the network through the PC port on the back of a Deskset.
Page 93: Error Handling
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Error Handling If you type an invalid value into one of the WebUI fields and click , the page is not saved. The WebUI displays an error message at the top of the page. The field with the incorrect value is highlighted in yellow, as shown in Figure 27.
Page 94: Basic Settings
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Basic Settings The remaining procedures in this chapter assume that you are already logged in to the WebUI. See “Accessing the Web User Interface (WebUI)” on page 92 After logging in, the Basic Settings page appears as shown in Figure 28. Your Extension Name, which the system administrator enters, is displayed on internal calls.
Page 95: Personal Directory
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Personal Directory To allow easy dialing, you can create a Personal Directory that is only available from your extension. You can also view and edit Personal Directory entries using the Deskset. “Directory” on page To add an entry to the Personal Directory: 1.
Page 96 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents To edit Personal Directory entries: 1. In the navigation menu at left, click Personal Directory. The Directory List page appears. 2. Click [Edit] next to the entry to be edited. The Edit Personal Directory List Entry page appears.
Page 97: Quick Dial
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Quick Dial If your system administrator has set up your Deskset with quick-dial keys, you can add or edit entries for those keys. To add or edit quick-dial Entries: 1. In the navigation menu at left, click Feature Keys. The Programmable Feature Keys page appears.
Page 98: Help
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Help To access WebUI Help: 1. In the navigation menu at left, click Help. A PDF Help file opens. 2. To view a topic, click the link for that topic. The page for that topic appears.
Page 99: Troubleshooting
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents H A P T E R ROUBLESHOOTING If you have difficulty operating your Deskset, try the following suggestions in this section: “Common Troubleshooting Procedures” on page 100  “Display Messages” on page 101 ...
Page 100: Common Troubleshooting Procedures
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Common Troubleshooting Procedures Follow these procedures to resolve common issues. Resolving General Functional Issues To resolve a blank screen or device that does not work at all: Ensure the AC plug is plugged into an electrical outlet not powered by a wall ...
Page 101: Display Messages
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Display Messages The screen is blank or the Deskset menu does not work. Probable Cause Corrective Action There may be no power or “To resolve a blank screen or device that ...
Page 102 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Probable Cause Corrective Action The same Deskset extension Disconnect the network cable and reset the  number already exists. Deskset to factory defaults. Use a pen or paper clip to press the RESET button for more than five seconds.
Page 103: Calls Generally
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Calls Generally Calls are dropped. Probable Cause Corrective Action Restoring Deskset settings or Your system administrator should avoid updating  updating software while that software or restoring Deskset settings when you extension is in use will cause are likely to be using the phone.
Page 104 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents You hear static, sudden silences, gaps in speech, or garbled speech. Probable Cause Corrective Action You may be experiencing Your LAN administrator should ensure the  network problems. following minimum guidelines are met: A switched network topology is ...
Page 105 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents You are unable to transfer a call to an outside phone number. Probable Cause Corrective Action Transferring to an outside Check that your system administrator has  phone number has been enabled transferring to an outside phone number.
Page 106: Incoming Calls
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Incoming Calls Deskset does not receive incoming calls. Probable Cause Corrective Action Incoming call notifications Verify that Do Not Disturb is off. Make sure that  have been suppressed or DND is not in the top right corner of the Deskset delayed, or incoming calls display.
Page 107 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Deskset does not Auto Answer intercom calls. Probable Cause Corrective Action The Deskset is in DND mode. Deactivate DND. Press (MENU) –> 1 –> 4.  Caller ID is not working. The display shows and a digit for the name, and the same digit ...
Page 108: Outgoing Calls
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Outgoing Calls No dial tone. Probable Cause Corrective Action Handset cord is plugged into Ensure the handset cord is plugged into the  the wrong jack. handset jack on the side of the Deskset. Do not connect the handset cord to the corded headset jack on the back of the Deskset.
Page 109: Voicemail
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Voicemail Voicemail is not received at the extension you called. Probable Cause Corrective Action The extension‘s voicemail is Delete messages.  full. Extension is unplugged. Plug in the extension.  Your Deskset does not receive voicemail.
Page 110 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents The system does not respond to remote voicemail commands. Probable Cause Corrective Action The system cannot detect Confirm you have entered star, star (**) before  Dual-Tone Multi-Frequency entering your remote access code (user (DTMF) tones, which are the password).
Page 111: Other Deskset Features
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Other Deskset Features Other Desksets do not appear in the extension list. Probable Cause Corrective Action The Deskset is not connected Verify that the first two sections of the IP address ...
Page 112: Webui
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents WebUI Unable to access the WebUI Log-in page from my computer. Probable Cause Corrective Action The computer is not Verify the IP address. You must correctly enter  connected to the same...
Page 113: Pc/Deskset Interaction
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents PC/Deskset Interaction Internet connection or access to the local network on your computer does not work after installing the Deskset. Probable Cause Corrective Action The network cables are not Check that the network cable from the computer ...
Page 114: Cordless Headset (Sb35025 Only)
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Cordless Headset (SB35025 Only) The headset is not responding. Probable Cause Corrective Action The headset has lost 1. Disconnect the cordless headset battery. connection to the Deskset. 2. Wait three minutes. 3. Install the battery again and place the cordless headset into the charger.
Page 115 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents The headset registration is not working. Probable Cause Corrective Action The headset and the Deskset Confirm that you have placed the headset in the  are not communicating with charger before you press...
Page 116 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents No dial tone. Probable Cause Corrective Action Headset cannot Verify that the Deskset can make external calls.  communicate with Deskset. For more information, see “Outgoing Calls” on page 108 You may be out of range of the Deskset; move ...
Page 117 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents The Deskset shows no indication that the headset is on a call. Probable Cause Corrective Action The headset is registered to If nearby people have headsets, they may have  another Deskset. If others...
Page 118: Appendixes
Back to Contents PPENDIXES Appendix A: Soft Keys The Syn248 SB35020/SB35025 Deskset features keys below the LCD screen. The bottom of the screen displays the appropriate label for each key as the function of the key changes. Table 20 provides an alphabetical list of the labels that appear above the Deskset soft keys.
Page 119 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Table 20. Deskset Soft Key Functions (Continued) Function Description Function Description Transfers a call to personal Sends a message. voicemail Stop recording. Plays a message or recording. Stores the name and number into the Plays all messages.
Page 120: Appendix B: Technical Specifications
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Appendix B: Technical Specifications Table 21 lists the technical specifications for the SB35020/SB35025 Deskset. Table 21. Technical Specifications Feature Specification 6.9” × 7.9” × 8.1” (H × W × D @57° angle), ...
Page 121: Appendix C: Maintenance
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Appendix C: Maintenance Your system contains sophisticated electronic parts, so it must be treated with care. Avoid Rough Treatment Handle the unit gently. Save the original packing materials to protect your equipment if you ever need to ship it.
Page 122: Appendix D: Important Safety Instructions
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Appendix D: Important Safety Instructions This symbol alerts you to important operating or servicing instructions in this document. Always follow basic safety precautions when using this product to reduce the risk of injury, fire, or electric shock.
Page 123: Appendix E: Gpl License Information
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Appendix E: GPL License Information Portions of the software associated with this product are open source, and fall within the scope of the GNU General Public License (GPL). Accordingly, those portions of code are available to the public, consistent with the requirements of the GPL, in either source code format or object code format, depending upon the nature of the code at issue.
Page 124: Glossary
Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents LOSSARY This glossary provides definitions that apply to the Syn248 telephone system. active call: An established telephone call that is not on hold. analog phone: A non-Syn248 telephone that plugs directly into a normal telephone wall plug or into the Syn248 SB35010 Analog Gateway BYPASS port.
Page 125 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents Ethernet: A type of computer networking technology that connects devices via Local Area Networks (LANs). Extension list: A list of names and extension numbers for the Syn248 system telephones. extension number: The three-digit number representing each individual Deskset.
Page 126 Syn248 SB35020/SB35025 Deskset User’s Guide Back to Contents off hook: Indicates that you are on a phone call, have lifted the corded handset, or have pressed the (SPEAKER) or (HEADSET) keys to answer a call or to prepare to make a call.

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Syn248 sb35025

AT&T Syn248 SB35020 User Manual

Preface

Overview

Making Calls

Answering Calls

Call Management

Accessing Items in Lists

Directory

Voicemail

Call Log

Paging

Deskset Settings

Web Interface

Troubleshooting

Appendixes

Appendix A: Soft Keys

Appendix B: Technical Specifications

Appendix C: Maintenance

Appendix D: Important Safety Instructions

Appendix E: GPL License Information

Glossary

Quick Links

Troubleshooting

Need help?

Questions and answers

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Summary of Contents for AT&T Syn248 SB35020

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Table of Contents