Installing the Pipeline
Installation steps
Pipeline Start Here Guide
Preliminary January 30, 1998
2-21
Connecting telephone equipment
You can connect conventional telephones or other analog telephone equipment,
such as a fax machine, to the Phone ports on the back of the Pipeline. With most
kinds of ISDN service, each of the two Phone ports can get or receive voice calls
for one of the two directory numbers (telephone numbers) for your ISDN line.
Although you can connect more than one analog device to a particular Phone
port, you can only make or receive one call on each port at a time. For
information on how voice calls are made, and how the ISDN line can be used for
voice, data, or both at once, see Appendix D, “Pipeline Voice Features.”
The number of telephone devices you can connect to each phone port is limited,
in part, by the total “ringer equivalence” of the devices connected to the port, as
well as by other factors such as the length of the phone cable. (The ringer
equivalence, measured in units known as REN, is a measure of how much
electrical energy telephone equipment draws from the phone line.)
Whenever possible, only connect one device to each phone port. The sum of the
REN values of the devices connected to a single port should not exceed 3. (The
REN value of a device is often marked on its case. REN values may also be listed
in product specification sheets for the device.)
If you encounter problems when connecting more than one device to a port, try
replacing one or more of the devices with devices with lower REN values or try
using a shorter or better-quality phone cable.
To connect conventional telephones or other analog telephone equipment to the
ISDN line:
1
Connect one end of a modular telephone hookup cable to a conventional
telephone or other telephone device.
