Radio Shack ET-689 - Manual (Page 4)

4
READ THIS BEFORE
INSTALLATION
Each device that you connect to the
phone line draws power from the phone
line. We refer to this power draw as the
device’s
ringer equivalence number, or
REN. The REN is on the bottom of the
base.
If you are using more than one phone or
other device on the line, add up all the
RENs. If the total is more than five, your
phones might not ring. In rural areas, a
total REN of three might impair ringer
operation. If ringer operation is impaired,
remove a device from the line.
FCC STATEMENT
This telephone complies with Part 68 of
FCC Rules. Upon request, you must
provide the FCC Registration Number
and the REN to your phone company.
These numbers are on the bottom of the
base.
Note: You must not connect your phone
to any of the following:
• coin-operated systems
• party-line systems
• most electronic key phone systems
43-689.fm Page 4 Thursday, September 16, 1999 10:22 AM