I want the fax to work with an identa ring. How do I program this? As it is now I have to turn on the fax to receive. Does this HP work with identa ring?

Introduction The HP All-in-One can receive faxes automatically or manually depending on the Auto Answer setting. If the Auto Answer option is set to On (the default setting), the HP All-in-One will automatically answer incoming calls and receive faxes after the number of rings specified by the Rings to Answer setting. (The default Rings to Answer setting is five rings). Refer to the given instructions to receive faxes automatically or manually. Receiving faxes The HP All-in-One can receive faxes automatically or manually. Receiving a fax automatically To receive faxes automatically, set the Auto Answer option to On (the default setting). The HP All-in-One will automatically answer incoming calls and receive faxes after the number of rings specified by the Rings to Answer setting. (The default Rings to Answer setting is five rings). Receiving a fax manually If the HP All-in-One has been set up to receive faxes manually (the Auto Answer option is set to Off ), or you answer the phone and hear fax tones, use these instructions to receive faxes.

1. Make sure the HP All-in-One is turned on and you have paper loaded in the input tray.
2. Remove any originals from the document feeder tray.
3. Set the Rings to Answer setting to a high number to allow you to answer the incoming call before the HP All-in-One answers. Or, turn off the Auto Answer setting so that the HP All-in-One does not automatically answer incoming calls.
4. If you are currently on the phone with the sender, instruct the sender to press Start on their fax machine.
5. When you hear fax tones from a sending fax machine, do the following:
   1. Press Start Fax Black or Start Fax Color on the control panel of the HP All-in- One.
   2. When prompted, press the down arrow to highlight Receive Fax Manually , and then press OK .
6. Press Start Fax Black again.
7. After the HP All-in-One begins to receive the fax, you can hang up the phone or remain on the line. The phone line is silent during fax transmission.
   
   
   Trust this is helpful. Please vote. :)
   
   

try restoring it to factory settings and see if this helps

Quoted from the manual: The HP all-in-one will not automatically answer calls. You must receive all faxes manually by pressing Start Fax Black or Start Fax Color. For information on receiving faxes manually, see Receive a fax manually. You might use this setting if the majority of calls on this phone line are voice calls and you rarely receive faxes.
This page has more information: http://www.fixya.com/support/p378554-hp_officejet_6210_all_in_one_inkjet/manual-3600/page-86

if it sends ok, then it has probably been switched to "manual receive" form "automatic mode"

Receive a fax
Depending on the Auto Answer setting, your HP All-in-One can receive faxes
automatically or manually. If you have set the Auto Answer option to Off, you will
need to receive faxes manually. If the Auto Answer option is set to On (the default
setting), your HP All-in-One will automatically answer incoming calls and receive faxes
after the number of rings specified by the Rings to Answer setting. (The default
Rings to Answer setting is five rings.)
Receive a fax manually
If you set up your HP All-in-One to receive faxes manually (the Auto Answer option is
set to Off) or you answer the phone and hear fax tones,
1. Make sure the HP All-in-One is turned on and you have paper loaded in the input
tray.
2. Remove any originals from the document feeder tray.
3. If you are currently on the phone with the sender, instruct the sender to press
Start on their fax machine.
4. When you hear fax tones from a sending fax machine, do the following:
a. Press Fax on the control panel of your HP All-in-One.
b. When prompted, press 2 to select Receive fax.
c. After the HP All-in-One begins to receive the fax, you can hang up the phone.

You need to set the machine up to AutoAnswer as follows per HP:

Receiving faxes automatically If the Auto Answer option is set to On , the unit automatically answers incoming calls and receives faxes after the number of rings specified by the Rings to Answer setting. Press Auto Answer to turn on the Auto Answer option. 1: Setting the Auto Answer option

1. 1 - Auto Answer button
   NOTE: The Auto Answer button is lit when the Auto Answer option is turned on.
2. Press Auto Answer again to turn off the Auto Answer option.

Here is a link to the user guide.. This should provide info on how to program the fax to answer o n the second ring. I don't know however how you have 2 numbers assigned to one line?


http://h10025.www1.hp.com/ewfrf/wc/manualCategory?product=351106&lc=en&cc=us&dlc=en&lang=en&cc=us

• The Rings to Answer feature might not be set to answer after the
appropriate number of rings for your office setup.
• If you have a voice mail service at the same phone number you use
for fax calls, you must receive faxes manually, not automatically. For
information on how to receive faxes manually, see receive a fax
manually from a phone on page 48.
• If you have a PC modem on the same phone line with your
HP Officejet, check to make sure that the modem’s software is not
set to receive faxes automatically. Modems with this auto fax
receive feature turned on will take over the phone line to receive all
incoming faxes, which will prevent the HP Officejet from receiving
fax calls.
• If you have an answering machine on the same phone line with
your HP Officejet, you might have one of the following problems:
– Your outgoing message might be too long or too loud to allow
the HP Officejet to detect fax tones, and the calling fax machine
might disconnect.
– Your answering machine might not have enough quiet time after
your outgoing message to allow the HP Officejet to detect fax
tones. This problem is more common with digital answering
machines.
The following actions might help solve these problems:
a. Disconnect the answering machine and then try receiving a fax.
If faxing is successful without it, the answering machine might
be causing the problem.
b. Reconnect the answering machine and re-record your outgoing
message. Make sure the message is as short as possible (no
more than 10 seconds long), and that you speak softly and
slowly when recording it. Try again to receive a fax.
• If you have a special ring pattern for your fax phone number (using
a distinctive ring service through your telephone company), make
sure that the Answer Ring Pattern feature on your HP Officejet is set
to match. For example, if the phone company has assigned your
fax number a double ring pattern, make sure Double Rings is
selected as the Answer Ring Pattern setting. For information on
changing this setting, see change the answer ring pattern
(distinctive ringing) on page 63.
Note that some ring patterns cannot be recognized by the
HP Officejet, such as those with alternating short and long ringing
patterns. If you are having problems with a ring pattern of this type,
ask your phone company to assign a non-alternating ring pattern.

http://h10032.www1.hp.com/ctg/Manual/c00095626.pdf

Use an identa call box. You set the distinctive ring pattern (1-2-3) and the box will route the call through depending on what number it is. I have two numbers on one line. I have a tee adapter on the phone plug with two phone cables coming out. Each phone cable one plugs into a small distinctive ring box. I set one box switch to 1, and the second box to 2. If the first phone# rings box 1 allows the signal through to the phone. If the fax line rings the phone won't ring, but the second box will pass connection to fax and vise versa.

I brought mine from Bell Canada phone store. It is called a identa-call box, or distinctive ring switch. Best way to go !

press setup and change the following settings

basic fax settings:
1. auto answer : ON
2. Rings to answer = 3 rings (recommended)

Advanced fax settings:
1. distinctive ring pattern = all rings
2. ECM = OFF
3. Fax speed = slow