How do you answer an incoming call. I have lost the instructions!

Cannon's website has all the manuals you will need... Visit: http://www.usa.canon.com/cusa/support/consumer/printers_multifunction/pixma_mp_series/pixma_mp530#BrochuresAndManuals

for further help please name model type number.

A lot of older answering machines had the basic instructions printed somewhere on the device itself. Check under the tape lid/hatch and on the sides or bottom of the device for instructions on a sticker, label, or imprinted into the plastic.

Here is the link..

http://phone.manualsonline.com/manuals/mfg/uniden/uniden_answering_machine_product_list.html
Thank you...

Uniden exi8580 instruction manual.... CLICK HERE

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Deleting an incoming message

From the base
Press (erase)f during message playback.
• The current message is deleted.

From the handset
During message playback, press OK
to enter the options menu.
Select DELETE. Press OK.
• The current message is deleted

Deleting all old incoming messages

From the base
Press and hold (erase) during standby.
• All old messages are permanently deleted.

From the handset
Press (menu)
Select ANSWER MACHINE >
DELETE ALL. Press OK.
• The handset displays a confirmation
request.
Press OK to confirm.
• All old messages are permanently
deleted.

Note
Unread message(s) cannot be deleted,
and deleted message(s) cannot be
recovered.

I think she would have to answer it as normal, and then hit the 'hands free' button. Try searching the web for the instructions for it.

Remotely Operating Your Answering Machine

Call your telephone number and wait for the answering machine to answer. If the answering machine is off, it will answer after about 10 rings and series of beeping sounds.
During the greeting message (or a series of beeps when the answering machine is off), press [0] and enter your PIN code within 2 seconds (see "Setting a Security Code or Personal Identification Number (PIN)" on page 54).
The answering machine announces the current time and the number of messages stored in memory. You hear "To play incoming messages, press zero-two. For help, press one-zero." You will hear a beep.
Enter a remote command within 15 seconds, each command there after must be entered within 2 seconds.

The answer mode determines whether your HP All-in-One answers incoming calls or not.
• If you set the HP All-in-One to answer faxes automatically, the HP All-in-One will answer all incoming calls and receive faxes. Set the Auto Answer setting to On. • If you set the HP All-in-One to answer faxes manually, you must be available to respond in person to the incoming fax call or your HP All-in-One will not receive faxes. Set the Auto Answer setting to Off. For more information on receiving faxes manually, see Receive a fax manually. If you do not know which answer mode to use, see Choose the recommended answer mode for your setup.
To set the answer mode 1 Press Setup. 2 Press 4, and then press 2. This selects Basic Fax Setup and then selects Auto Answer.
3 Press right arrow to select On or Off. 4 Press OK to accept the setting.