Eartec RJ9/4P4C Quick Disconnect cable (U10PS).
We are a Service Provider - not just a retailer - so we only sell equipment that we know works well with our network and sourced from reputable suppliers who are members of our trade association ITSPA. Our range of Plug & Go Hardware Products is guaranteed to work with the Voipfone network 'straight out of the box'.
Please note that this is not compatible with the Snom 300.
New technology can seem confusing at first, but don't worry, we are here to help!