I can't seem to find a way to change the ring setting. I want to be able to have the answering machine pick-up in 3 rings.

It seems that you're sharing your home phone line with your Lexmark fax machine. You can adjust the "pick-up" ring from the printer operator panel by pressing the Setup button > Fax Setup > Ringing and Answering > Pick Up On > select your preferred number of rings before the fax answers.
Please note:
If you have an answering machine connected to the same line as the fax, set the answering machine to answer incoming calls before the printer does. Increase the number of rings by a factor of 3 over the answering machine. For example, if the answering machine is set to pick up on 4 rings, set the printer to pick up on 7 rings.

If you have a voicemail feature in the same line as the fax, you may subscribe from your phone service provider for a distinctive ring pattern feature. You can program your printer to have a distinctive ring pattern and phone number for incoming faxes.

Should you still need assistance, please leave a comment to my response and I'll get back to you. Should this resolves your problem, your rating will be greatly appreciated.

Either your fax machine is set to answer on more rings then your answering machine is or you dont have the automatic answer key pushed?

Determine how many rings your answering machine picks up on and then change the number of rings to a lower amount on your fax machine. To change the number of rings before picking up the line, press the "menu" key on the fax machine and use the up and down arrows to scroll until you find the "basic fax set up" or the "advanced set up" areas. I am not sure which one will have the number of rings setting. Try looking in both until you find it.

when you see it press "ok" or "enter" get in and change the amount of rings before answering. call your fax machine to make sure it picks up before your answering machine.

This should solve your problem.

You need to check the setup ..

The telephone line which is coming from out should be connected to the line 1 of the printer and Telephone answering machine should be connected to Line 2 .

2. You also need to check that after how many rings the Telephone answering machine answers the call you have to keep the "Rings to answer" 2 less than that of Telephone answering machine.

Lets assume that your Telephone Answering Machine answers the call after 4 rings then keep the rings to answer in All in One to 2

How to set Rings to Answer

1. Press the Setup button on the Front panel of the printer

2. Scroll Down and go to Basic Fax Setup - Select it

3. Scroll down and got to - Rings to Answer - Select it

4. Set the Rings here and then try Fax

it will fix the problem :)

Set rings to answer
You can select the number of rings that will occur before the fax answers an incoming call. If you are using your machine as both a telephone and a fax machine, we suggest you set the ring count to at least 4 to give you time to answer.
TIP: HP 1050 Fax: The Toll Saver function for the Digital Message Center interacts with Rings to Answer. See Toll Saver on page 40. If you have the HP 1050 Fax and have Toll Saver turned on, set the Rings to Answer to 2.
1. Press Menu repeatedly until BASIC FAX displays and press Start/Enter.
Rings to Answer will display.
2. Press Start/Enter.
3. Enter the number of rings you want (2-7) and press Start/Enter.
The HP Fax rings the set number of times and then answers. It then produces a different sounding ring to alert you to which type of call is incoming.
• The additional ring may occur once for a fax call
• The additional ring occurs 5 times for a voice call. After the 5 additional rings, the answering machine will answer.

Press and hold the SET button to enter the change mode. The unit announces the current time and day. Press SET repeatedly until the unit announces the rings to answer. Press and release NEXT or PREVIOUS until the unit announces the correct number of rings for the answerer to pick up. Once the rings to answer is set, press SET to enter the incoming message length menu.

If you need a manual, you can download one here.

SETTING THE RINGS TO ANSWER

The unit announces the rings to answer. To change,
press NEXT or PREVIOUS. To set and go on to the next
item, press SET.
1. Press and release NEXT or PREVIOUS until the unit
announces and displays the correct number of rings
for the answerer to pick up.
2. Once the rings to answer is set, press SET to enter
the incoming message length menu.

Ring Select and Toll Saver

Use Ring Select to choose how many times the line will ring before the
system answers a call. Set for 2, 4 or Toll Saver. When you set the
system for Toll Saver, it answers after four rings when you have no new
messages, and after two rings when you have new messages.

1. Press and hold [SET UP] for about two seconds. The system announces
the current ring selection.

2. Press and release [ANN/SKIP] or [MEMO/REPEAT] until the system
announces your ring selection.

3. Press and release [PLAY/STOP] to exit
-OR-
Press and release [SET UP] to change the Remote Access Code (follow
Steps 2-5 under "Remote Access Code").

Looks like 6 is the Max, according to the Manual.

Setting the Ring Time
Ring Time allows you to set the number of rings the caller hears before your
answering system plays the outgoing message. You can set the ring time to answer
after two, four, or six rings. If you enable the Toll Saver (TS), the answering system
picks up after two rings if you have new messages and after four rings if there are
none.
1) Enter the Answ. Setup menu, and then the Ring Time
submenu (see "Entering the Menu Option" on
page 16).
2) Press volume up/down to select a Ring Time (Toll
Saver, 2 Times, 4 Times, or 6 Times).
3) Press the OK soft key. You will hear a confirmation tone.

Toll saver is a feature where you can call the phone yourself, if there are messages it wil answer in 2 rings, if not it'll answer in 4 rings. The idea is to hang up on the 3rd ring and save the LD changes.

Hope that fixed Ya...

Geno

Press "Mute" to setup handset, select "Ring to answer", here are 1,2,3,5,6,L choice. you can change to 3.

here is the manual

http://www.retrevo.com/s/sharp+UX-B700+manual

good luck