HP J5780 User Guide - Microsoft Windows - Page 39
Case H: Shared voice/fax line with computer dial-up modem, Example of a parallel splitter
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Case H: Shared voice/fax line with computer dial-up modem If you receive both voice calls and fax calls at the same phone number, and you also have a computer dial-up modem connected on this phone line, set up the HP All-in-One as described in this section. Since your computer dial-up modem shares the phone line with the HP All-in-One, you will not be able to use both your modem and the HP All-in-One simultaneously. For example, you cannot use the HP All-in-One for faxing if you are using your computer dialup modem to send an e-mail or access the Internet. There are two different ways to set up the HP All-in-One with your computer based on the number of phone ports on your computer. Before you begin, check your computer to see if it has one or two phone ports. • If your computer has only one phone port, you will need to purchase a parallel splitter (also called a coupler), as shown below. (A parallel splitter has one RJ-11 port on the front and two RJ-11 ports on the back. Do not use a 2-line phone splitter, a serial splitter, or a parallel splitter which has two RJ-11 ports on the front and a plug on the back.) Figure 4-7 Example of a parallel splitter Fax setup 37