I have a ATT cordless phone model EL51209 it came with a base an one extra phone, I need another phone, so I bought another EL51209, to get another phone, but they do communicate with each other. the new phone showing connecting.....
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The AT&T EL51209 does not have an answering system. It will check your voice mail if you have that service from your telephone company. You need to check the voice mail FAQ from the provider to set an outgoing message. Otherwise, you'll need a separate answering machine that is connected to the phone jack and then connects to the EL51209.
Make sure that the base has power and is connected to a working phone (land) line. To deregister all handsets, press and hold the Flash (on the left below the volume buttons) on the base for about 4 seconds. You'll see "Deregister all handsets?". Release the Flash button. Press the Yes soft key (below the LCD screen). You should see the base LCD screen read "Please wait". The registered handsets should read "Out of range or no power at base" until the deregistration is complete. Then you should see the message "Press Hold on base for 4 seconds and then press # on the handset" on all the handsets. The instructions are on pages 11/12 (page 15/16 of the PDF) of the handset manual. They are also in the full manual for the TL86109 on pages 135/136 (141/142 of the PDF) available here: https://att.vtp-media.com/products/TL/TL86109/TL86109_CIB_i14.0_20170526.pdf .
Hi,
Try the following:
1/ Make sure the power cord is securely plugged in at the base and that it's powered on ie: light is on and working etc..
2/ Reset the telephone base. Unplug the electrical power. Wait for
approximately 15 seconds, then plug it back in. Allow up to one minute for the cordless handset and telephone base to reset.
3/ Place the cordless handset in the telephone base for one minute to allow the cordless handset and base to synchronize.
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