43-1039.fm Page 4 Tuesday, August 17, 1999 10:12 AM

READ THIS BEFORE INSTALLATION

We have designed your telephone to conform to federal regulations, and you can connect it to most telephone lines. However, 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 shown on the bottom of your phone’s 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 phone might not ring. In rural ar- eas, a total REN of three might impair ringer operation. If ringer operation is impaired, remove a device from the line.

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FCC STATEMENT

This telephone complies with Part 68 of FCC Rules. You must, upon re- quest, provide the FCC registration number and the REN to your phone company. These numbers are located on the bottom of your phone’s base.

Note: You must not connect your phone to any of the following:

Coin-operated systems

Party-line systems

Most electronic key phone sys- tems

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Radio Shack ET-539 owner manual Read this Before Installation, FCC Statement