Support for Gigaset S675

Gigaset S675
Welcome to the support resource for your Gigaset S675. On this page you will find answers to frequently asked questions. Manuals as well as software and firmware are available for download. You will also find video tutorials, which will help you to get started. Should your device be defect, you can register your Gigaset S675 for a repair. Furthermore you will find accessories for your Gigaset S675. If you're looking for products matching your Gigaset S675, have a look at our compatibility database. You can also find out how to register your Gigaset S675 with other devices.

Answers to frequently asked questions

You have questions regarding your Gigaset product? Here you will find answers.

Top 10 FAQs

  • First steps for troubleshooting
  • 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.

  • Notes on operating a Gigaset phone on the analog telephone connection of a router or modem

    If you operate your Gigaset on the telephone connection of a router/modem, make sure that you have noticed the following points:


    • Use the phone cable from the Gigaset packaging.
    • If the router or modem does not have a phone jack, it is necessary to use the enclosed phone cable or the enclosed phone adapter of your router/modem.
    • Connect the cable to the router`s phone jack / phone port / FON port.
    • Please check if your telephone data (internet telephone number, provider-profile, …) for the used telephone connection in the router/modem were entered correctly.
    • Please make sure that your internet connection is working.


    If the problem persists, please contact your provider.

  • 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.

  • Which batteries should I use for the Gigaset handset?

    Recommented batteries:

    For Gigaset handsets, use only the batteries approved by Gigaset. The high quality standard guarantees safe use and a long service life.
    NiMh round cells type AAA can be purchased in our Gigaset online shop.

  • Does the Gigaset S685/S685 support OPCAP ?

    The meaning of OPCAP

    Description: Open Platform For Cordless Applications

    The OPCAP interface allows you to control different applications with an Gigaset telephone. Therefore a registration of the device which shall become controlled has to be registered to the Gigaset base station.

    The handset Gigaset S68H is able to display OPCAP menus.

    The Base station Gigaset S680 / S685 are supporting the OPCAP interface.

    Example: With OPCAP you are able to register the Gigaset M34 USB at the Gigaset S680 / S685 base station, to use the M34 functions. The supported functions are:

    VoIP calls through Skype (separate internet connection necessary)

    Remote control of PC programs

    Using of messenger programs such as MSN, Yahoo, ICQ, AOL and Skype.

    Configuration of the phone book

    Other examples you can find here: www.gigaset-special.com/homecontrol/

  • Reset the base station to factory conditions
    • Unplug power supply
    • Hold down Paging key
    • Plug in power supply
    • Hold down Paging key at least for 3 seconds
    • Release Paging key

    After that the reset is performed and all handset are deregistered

  • How can I deregister handsets from the base?
  • How to transfer the phonebook of the Gigaset S685 / S685?
  • What must bepointed out during an automatic registration?

all FAQs by Topic

Check compatibility

Check if a particular Gigaset handset is compatible with a Gigaset base station.
Check compatibility of handset and base station by selecting individual functions.

Register handet to base station

You have a Gigaset S675 base station and want to register a handset?
Register handset to the Gigaset S675

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