1-LINE On/Off Switch for Telephone, Fax, DSL Modem and Any Device connected to a 1-line Phone Jack. The Telephone Remote Interrupt Control Kit. The “TRICK”. Amazon Exclusive! – Office Junky
Amazon.com: RJ11 Telephone Phone/Fax/ADSL Line Jack Coupler Switch Adapter Connector Random Color : Electronics
Amazon.com: Brother FAX-575 Personal Fax, Phone, and Copier : Everything Else
Amazon.com : Panasonic KX-FP145 Slim-Design Fax Machine with Answering System : Office Products
Amazon.com: Phone Line Splitter Adapter 1 to 5, RJ11 6P4C Male to 5 Way 6P4C Female Socket Used for Connect Printer, Fax Machine and Multiple Landline Telephones : Electronics
Avro Pacific Fax Friend Fax Switch aka Line Wizard or Xtraline with RJ11 connectors : Amazon.co.uk: Health & Personal Care
1-LINE On/Off Switch for Telephone, Fax, DSL Modem and Any Device connected to a 1-line Phone Jack. The Telephone Remote Interrupt Control Kit. The “TRICK”. Amazon Exclusive! – Office Junky