Fly lead version, this filter has a BT plug bonded onto a fly lead-a version without the fly lead is availableHERE This microfilter is designed to
allow you to connect both a telephone and broadband modem to the
same phone line. If you have an ADSL line you will need one of these
on each telephone point as they filter out the digital signal
removing interference from the line. These are standard microfilters
compatible with any ADSL telephone line.