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Analog Phones


  • 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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  • Why isn't there any picture in the display during an incoming call?

    To see a picture in the display in addition to the number from an internal caller you have to achieve the following settings:


    • At least one picture must be stored in the Media pool from the handset/base (via Gigaset QuickSync)
    • A directory entry must be dedicated to a picture in the directory entry options.
    • The caller must show his number for outgoing calls.
    • The Network provider must support the CLIP function and this function must be activated

    Important Note:


    If a handset with picture-CLIP-function is registered to an older base station it could be possible that there is no picture shown in the display due to incompatibility reasons.


    In these cases please have a look at our compatibility database and choose your combination to see if it is possible or not.



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  • New firmware for the handsets Gigaset SL400H, S79H and S810 available

    A new software version (053) for the handset SL400H, S79H and S810 is available:


    Improvements with this version:

    • As of this version, update also possible with a MAC PC
    • Improvements for operation on multi-cell systems
    • CLIP display is supported for incoming calls for Alcatel PBXs
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  • For which purposes can I use the integrated Bluetooth functionality?
    • Connecting Bluetooth headsets Exchangeing adressbook entries as VCards
    • Receiving adressbook entries from a second Bluetooth device (e.g. mobile, PDA)
    • Sending adressbook entries to a second Bluetooth device (e.g. mobile, PDA)
    • Copying contacts from the PC to the adressbook of the handset using the QuickSync Software


    Indications regarding the different functions:


    Headset operation:

    An outgoing call will not be transfered to the Bluetooth headset automatically. The connection to the call party has to be initiated as usual using the on-/off hook key at the handset or the handsfree key. Please press the on-/ off-hook key at the Bluetooth headset briefly to transfer the call from the handset to the headset

    The Gigaset handset supports the Bluetooth Headset- and Handsfree Profile. Please make sure your Bluetooth headset supports one of these profiles too.


    VCard transfer:

    If you want to receive entries from a mobile phone or an PDA this can lead to problems, if you try to send a block of entries.

    Fotos attached to a VCard entry will not be accepted from the Gigaset handset, due to restricted storage in the handset.

    In some cases it leads to problems, if a foto is assigned to the VCards. In this case the only possibility is to send the entry without foto.

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  • Which Bluetooth profiles are supported by the SL78H / SL400H / S810H / S820H / S850H / SL910H handset?

    Whether Bluetooth® devices can communication with each other is a profile question. It is important that they support and use the same Bluetooth® profile for different functions.

    The Gigaset SL78H / SL400H / S810H / S820H / S850H / SL910H handsets are working with the Bluetooth® 2.1 standard  and support the following profiles:

    Serial Port Profile (SPP) for data communication with a PC.
    Headset Profile (HSP) and Handsfree Profile (HFP) for communication with a headset.
    OBject EXchange Profile (OBEX) for the transfer of address book entries (vCards).

    Known BT-Headsets, that do not work correctly with S810H, S820H and SL400H:
    - Jabra Wave BT 3.0 (100-93050000-60)



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  • Is is possible to update via Bluetooth?

    Updating via Bluetooth is not supported. Please connect the handset to your PC using an USB data cable.

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Gigaset SL400H - FAQ Topics


  • Audio / ringtones
  • B

  • Bluetooth
  • C

  • Compatibility of Gigaset handsets at routers
  • D

  • Display
  • F

  • Firmware Update
  • First steps for troubleshooting
  • N

  • Notes on Caller ID (CID)
  • P

  • Picture CLIP
  • R

  • Registering