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Analog Phones


  • Base reset
    • Unplug the power-supply unit from the socket.
    • Press and hold down the paging key on the base station.
    • Plug in the power-supply unit again.
    • Keep the paging key on the base station pressed.
    • Release the paging key after 3 seconds.

    PLEASE NOTE! The entire contents of the memory will be deleted. All portable handsets will be deregistered. The system code will be reset to 0000.

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  • Notes on Caller ID (CID)

    By default, the number of the caller is shown in the display of your Gigaset telephone. You do not have to make any other settings on your Gigaset telephone. However, if the caller's number is not displayed, this can be due to the following:

    - You have not ordered CID from your network provider or
    - Your telephone is connected through a PBX that does not transmit all information.

    Is your telephone connected through a PBX/gateway?
    You can establish this by checking for an additional device connected between your telephone and house connection, e.g., a PBX, gateway etc.
    In most cases, simply resetting this device will remedy the situation:
    - Briefly disconnect the power plug of your PBX.
    - Re-insert the plug and wait for the device to restart.

    If the caller number is still not displayed:
    Check the CID settings of your PBX and activate this function if necessary. In the user guide for the device, search for the term "CID" (or an alternative term such as "phone number transmission", "caller ID", ..).

    If necessary, contact the device manufacturer. If this does not resolve the problem, it is possible that your network provider does not support the CID service for this number.

    Have you ordered the CID service from your network provider?
    Check whether your provider supports Caller ID (CID) and that the function has been activated for you. If necessary, contact your provider.

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  • How can I update the software from my handset?

    To enable your handset to communicate with the PC, the Gigaset QuickSync program must be installed on your PC (free to download at gigaset.com/hq/en/cms/PageQuickSync.html). 

    The firmware-update of handsets is only supported by Gigaset QuickSync for Windows. The Gigaset QuickSync for MacOS supports only the firmware-update of the SL910H.


    Please make sure that you use the USB cable to connect the handset that you want to update, as updating via Bluetooth is not supported!


    If your handset is updatable and your PC is connected to the Internet, Gigaset QuickSync will automatically check for new firmware at least once a day, and if it is available it will prompt you to update your handset. You may disable this feature by unchecking the “Check Internet for new firmware and notify if update is available." checkbutton on the Settings - Firmware... page. It can also be disabled via the appropriate checkbox when Gigaset QuickSync prompts you to update your handset.


    You can always trigger the facility to check the Internet for new firmware manually:

    • Connect your phone to your PC using a USB data cable.
    • Start the Gigaset QuickSync program on your PC.
    • Establish a connection to your handset.
    • Click in the main menu of QuickSync on Firmware update.


    This launches the firmware update. The update process can take up to 10 minutes (not including the download time). Do not interrupt the process or remove the USB data cable. The data is initially loaded from the update server on the Internet. The amount of time this takes is dependent on the speed of your Internet connection.

    The display on your phone is switched off and the message key and the talk key start flashing. Once the update is complete, your phone will automatically restart.

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  • How to name the different parts of the Gigaset SL780 / SL785?

    Every part of a gigaset model has its own label.

    The base station

    The base station is that part of your Gigaset where the telephon cable is plugged in.

    At the bottom side of the base station you will find a lable with the description of the base station. Normally that is also the description of the whole Gigaset System.

    The handset

    The handset is the mobile part of your Gigaset.

    In the battery compartment or at the battery cover you will find the description of the handset.

    If the Gigaset System has a seperate charging cradle, you will find the description of the handset at the bottom side of it too.

    The charging cradle

    At some Gigaset models you have a stand-alone base station. In these cases the handset will be delivered with a seperate charging cradle. The cradle belongs to the handset and share its description. For example if you have a Gigaset SL56 the description of the cradle is SL56 charging cradle.

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  • How can I do an external call with the Gigaset SL780 / SL785?

    Enter the number and press the talk key.

    No dial tone after pressing the talk key?

    1. Please note, that you have to press and hold, the talk key to hear the dial tone. By pressing the talk key briefly you will open the redial list from the last 10 numbers.

    2. If you press the handsfree key you will hear the dial tone directly.

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Gigaset SL785 - FAQ Topics


  • Alarm clock
  • Answering machine
  • Audio / Ringer Tones
  • B

  • Bluetooth
  • C

  • Call list
  • Calendar / Appointments
  • D

  • Display
  • Directory / Phone book
  • Date/Time
  • F

  • First steps for troubleshooting
  • Firmware update
  • N

  • Notes on Caller ID (CID)
  • P

  • Picture CLIP
  • R

  • Registering
  • Room monitor
  • Reset procedures
  • S

  • Settings / Using / Handling
  • U

  • Using behind PABX