Here is a Data Transfer Switch 4 Way RJ11

This RJ11 manual data switch box can be used to switch between four different telephone / phone-type devices. Heavy-duty control switch on front. Anti-skid rubber feet.

Take advantage of combined shipping for multiple cable purchases. Use “add to cart” (not buy it now) for each item. Then select “Request total” link located on the cart screen to receive an invoice with a single shipping charge. If “Request total” link is not available, send message to seller with the names of your selections and a special listing with a combined shipping charge will be set up for you to purchase normally.