I have a gigaset 8825. I have a "distinctive ring" problem

There is excellent support here on basic fax setups. You have what is known as "Distinctive Ringing Service". There are pros and cons to the various setups. I assume you recognize the rings and answer only when the ring for the landline talk comes on. The fax will pick up the faxes, and the answering machine will pick up the voice.

Need model number of your fax - google that!

Service manual for your phone.

http://service.us.panasonic.com/OPERMANPDF/KXTG7841-MUL.PDF
This link shows various configurations of setting up your phone/fax/answering machine or using an answering service.
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c00059780#Dist_ring
Distinctive Ringing Service setup While it is not available everywhere, a distinctive ringing service can be purchased from most telephone companies. With this service, more than one phone number is assigned to the same phone line. Each phone number will ring differently. The main number will ring with a normal single ring and the additional number will ring with a distinctive ring pattern assigned by the phone company.
When a distinctive ringing service is used, set the Rings to Answer to 2 and then follow the steps below to set the distinctive ringing pattern:

1. Press Setup , press 4 , and then press 1 to enter the Answer Ring Pattern setup of the Advanced Fax settings.
2. Use the Right Arrow to scroll through the available settings. When the ring pattern assigned by the phone company displays (double or triple rings), press OK .

Try resetting the machine to it's defualt settings.

Call your phone company to sign up for service. Ask for an additional line with a "distinctive ring." The additional line is for your fax machine---whenever you hear the distinctive ring you'll know that a fax is coming through. Get voice mail service on the regular phone line as well.

Purchase a two-jack phone splitter (sometimes called a wall jack adapter) that allows two cords to plug into the same phone line. Plug it into the phone jack in your wall.

Run a phone cord from both machines into the wall adapter. Test the system by calling both your regular phone number (assure it rings and the voice mail picks up) and your fax number to see if the fax machine picks up (you'll hear a set of strange beeping tones).

Distinctive Ring basicsDistinctive Ring service is an optional service available from many telephone companies. The Distinctive Ring service permits you to assign more than one telephone number to the same telephone line. Distinctive Ring allows you to use a single phone line for both voice and fax calls. You can assign a unique phone number and ring pattern for incoming fax calls. When a fax comes in, each telephone number makes a distinctive ringing sound, such as a single ring, double ring, or triple ring.
NOTE: The Distinctive Ring Service is the name HP and others use to describe this feature. Distinctive Ring is also known as:

• Call Sign
• Custom Ring
• Ident-a-Call
• Ident-a-Ring
• Ident-a-Ring
• Multi Ring
• Personalized Ringing
• Ringmaster
• Smart Ring
• Teen-Ring

The Distinctive Ring Service allows the HP product to work similarly to a dedicated fax line. If you connect an HP fax product and a telephone to one telephone line, you can assign one telephone number for fax calls and another for voice calls.
NOTE: You cannot send or receive faxes when the phone line is in use. Even if the HP fax product has a separate telephone number, it is still sharing the same phone line. Set the Distinctive Ring Service Using the menus on the product control panel, follow these steps to set a distinctive ring pattern. Step one: Turn on Auto Answer Turn on Auto Answer by pressing the Auto Answer button on the control panel. The button light indicates when Auto Answer is on.If the button light is already on, you do not need to press the button. Step two: Set the distinctive ring patternFollow these steps to change the answer ring pattern.

1. Press the Setup button ( ) on the product control panel.
2. Press the Right Arrow button ( ) to select Advanced Fax Setup , and then press the OK button.
3. Press the Right Arrow button ( ) to select Distinctive Ring , and then press the OK button.
4. Press the Right Arrow button ( ) to select one of the following options:
   • All Rings
   • Single Rings
   • Double Rings
   • Triple Rings
   • Double & Triple Rings
5. Press the OK button to select the option.
6. Press the Back button ( ) to return to the main menu.

Now if you have anymore problems copy the link from below and paste it in your address bar and it will help you further with a document. Follow all the settings in the document and your fax should be setup,keep in MIND THAT THE RINGS TO ANSWER SHOULD BE 2,SO YOU CAN RECEIVE FAXES AFTER TWO RINGS

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01647469&tmp_task=solveCategory&lc=en&dlc=en&cc=us&lang=en&product=3795406

Thank you for specifing your connection>

When you have a shared fax line it is import to have a Distinctive Ring Pattern which will differenciate the type of ring patter to recieve voice calls and Fax message.
All You need to do is get a distinctive ring pattern from your telephone service provider (AT&T) and setup your fax machine as per the ring pattern provided by your service provider.

All you need to do is set your rings to answer in youe phone to Rings 4 in your Phone.

Then in the All-In-One Go to menu / Setup> Press the right arrow key and locate basic fax setup> Press Ok and set the Ring Pattern to Number 5 or 6> Press Ok and cancell to come to the main menu
Then in the All-In-One Go to menu / Setup> Press the right arrow key and locate Advance Fax Setup> Locate Distinctive ring pattern and set it to the ring pattern which your Telephone service provider has alloted i.e Single Ring, Double Ring or or Triple Ring (Whichever is applicable)> Nd press Ok and cancell to come to the main menu.

Then you will be able to receive fax message voice cals and voicemail without any interuption.

Good Luck

How to Set the Receive Mode (MF4140/MF4150)
1. Press [Additional Functions]. 2. Use [Left cursor] or [Right cursor] to select [FAX SETTINGS], then press [OK]. 3. Use [Left cursor] or [Right cursor] to select [RX SETTINGS], then press [OK]. 4. Use [Left cursor] or [Right cursor] to select [RX MODE], then press [OK]. 5. Use [Left cursor] or [Right cursor] to select the receive mode, then press [OK]. [FaxOnly]: Answers all calls as faxes and disconnects voice calls. [AnsMode]: Receives faxes automatically and records voice messages. [NET SWITCH]: Distinguishes between fax and voice calls. [FaxTel]: Switches between fax and voice calls automatically. [MANUAL]: Does not answer any calls. You have to manually receive faxes. NOTE: a. For [FaxTel] or [MANUAL], make sure the optional handset or an external telephone is connected to the machine. b. For [AnsMode], make sure an answering machine is connected to the machine. c. The [NET SWITCH] mode is available for certain countries only and requires subscription to a network switch service. 6. Press [Stop/Reset] to return to the standby mode.

You can adjust the volume and pitch of the ringing by pushing Menu, scroll forward to Desk Station Settings, push Select, scroll to Ringer Volume and you can adjust the ringer volume, and in that same area adjust the pitch. So you might want to make line 2 ring lower, and with a different pitch so it is not distracting, but still notifies you of an incoming call that is not line 1. The same goes for the handset.

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 !

Its called distintive Ring. This is the instructions from the manual -

VERY IMPORTANT
If you have Voice Mail or a TAD (Telephone Answering Device) and want to keep
one of your phone numbers dedicated only to fax calls, you must leave the fax machine
in MANUAL mode at all times while using the distinctive ring feature. Here’s why:
Manual mode will never pick up a call by itself, since it is «Neutral ». When the fax
machine is in this « neutral » mode, the Distinctive Ring Feature can be activated. The
distinctive ring feature is actually an answering mode. So, do not activate FAX ONLY
mode or FAX /TEL mode while using distinctive ring; otherwise, the fax machine will
answer calls for all the numbers.
Registering the Distinctive Ring Pattern
1 Set the fax machine to MANUAL mode.
2 Press Menu/Set, 0, 1.
3 Press to select DISTINCTIVE:SET?, and then press Menu/Set.
4 Press to select the prestored ring pattern you want to assign, and then press
Menu/Set. (You will hear each pattern as you scroll through the four patterns.)
Be sure to choose the pattern assigned by the Telephone Company.
5 Press Stop/Exit.

and a link to the manual if you need it -
http://static.tigerdirect.com/pdf/brother-IntelliFax-775-Manual.pdf

You can download the manual from the link below: http://www.barclayent.com/manuals/Gigaset%208825%20Full%20Manual.pdf Please update the question & let us know if the information given was useful to you - Good Luck!