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Two types of fax/modem/voice switches are available share two devices.

  • Two different phone numbers sharing one phone line
  • Two different devices sharing one phone number and one phone line

Two different phone numbers sharing one phone line

Most telephone companies throughout the US and Canada offer an inexpensive service that lets businesses and homes to have two or three different phone numbers on one phone line. What distinguishes the different telephone numbers coming in on the same line is their signature ring, a pattern of long and/or short rings. Each number has its own special ring.

These "Distinctive Ring" services go by different names depending on your phone company -custom Ringing by US West, SmartRing by GTE, RingMaster by Bell South, RingMate by NYNEX, Personalized Ringing by Southwestern Bell, Multi-Ring by Ameritech, and IdentaRing by Bell Atlantic.

Once installed on your home or business line, the call processor "listens" in order to determine the pattern of each ring. Then they immediately route the call to the phone or device you have designated for answering that number - without ringing other phones/devices on the same line!

I would be interested in sharing 2 or 3 phone numbers on the same phone number.

Two different devices sharing one phone number and one phone line

The other type of two-device call processor is the tone detection processor.

It does not require any extra service from the phone company and routes the call to the proper device by "listening" for either a CNG tone (the tone that fax machines transmit), DTMF tones (touch tones made by phone or computer), or the absence of a tone (voice calls).

You can also manually transfer any call to another device by pressing a few numbers on your phone's touchpad.

I would be interested in sharing 2 devices on the same phone number.

More About Line Sharing:

Routing calls: tone detection and distinctive ringing.

Tone detection: Here the box immediately answers the phone call but the caller doesn't know it because the switch generates a ring tone so the caller thinks the phone is ringing but what the box is doing is listening. It listens for one of three things: cng tones (the tones a fax machines identifies itself with), dtmf (touch tones used in routing incoming modem calls appended to the dialing string), or the lack of a signal (this is the default port typically used for voice). The box listens and quickly identifies what type of call it is and then routes it to the proper device.

The Stick, The Stick II, ATX-250, ATX-300, and Polnet ACP are tone detection devices.

Distinctive ringing: Distinctive ringing is a service offered by your local telephone company that you pay about $2.50 a month per number for (similar to the way you pay for call waiting and other features). What it does is gives you up to three phone numbers on one line. Each number issues a different ringing pattern so if it's a normal ring you know its phone number one, a double ring is phone number two and so forth.

What a distinctive ringing box does is monitor the line and then routes the calls by phone number to the specific device for that phone number. The box never actually answers the phone to listen. It just monitors the phone company patterns so it just passes the phone company signal to the correct device and rings it. With this type of application, you have two or three phone numbers sharing one line. You actually have a fax number, a voice number, etc. It is just like a dedicated line except you can't have more than one call going at a time.

The SR-2 and SR-3 use the distinctive ringing feature to route the calls rather than the fax tones that the Stick uses so since it never really answers your phone (the way the stick does), it will work with the phone company voice mail. The SR also makes your small business look larger because on your stationary, business cards and other correspondence, you can have separate business and personal numbers plus a fax number. Three phone numbers looks better sometimes than one.

We also have a 4 line - 12 device distinctive ring switch called the Line Hunter for larger applications.

Commonly Asked questions:
I use phone company voice mail. How do these products work with voice mail?

I use call forwarding to forward my business calls to my cell phone.
Which type of device will be best for me?

ANSWER: The SR Series is the best for use with phone company call forwarding. If you forward your main number, your fax number (which shares the same single line) won't be transferred. All calls to your fax number will be automatically routed to your fax.

Click on one of the links above for your application or review the products below and click on the link that suits you best. Chances are you will find a switch that will meet your needs. Any of these products could save you thousands over the next few years by reducing your local phone bill.


The Stick

1 Year Warranty
High quality Voice/Fax/Modem/Data automatic call processor for the home or small business. Automatically routes calls to the right device every time!

Your Price only Delivered*

The Stick II

1 Year Warranty
A true two-line Voice/Fax/Modem/Data call processor.
Unique Features include:
• Call In/Dial Out Long Distance Saver
• Port-to-Port Communication and Data Transfer

  Your Price only Delivered*

SR Series

2 Year Warranty (SR2, SR3), 1 Year Warranty (LPSR)
The Selective Ring call processor for distinctive ring customers. Only ring the device intended for that call. Choose from 2 or 3 selective ring lines and AC powered or Line powered devices.

SR-2 (Two Devices)
Your Price only Delivered*

SR-3 (Three Devices)
Your Price only Delivered*


2 Year Warranty
Offering two models that, in addition to functionality similar to The Stick (voice/fax/modem call processor), can process selective ring detection, DIP switch programmability, phone line surge protection, and an internal busy signal. Highest quality automatic call processor in the world. The ultimate in reliability and dependability.

ATX-250 (Two Devices)  
Your Price only $196.00 Delivered*

ATX-300 (Three Devices)
Your Price only $299.00 Delivered*

ATX-300/6 (Six Devices)
Your Price only $479.00 Delivered*

Polnet® ACP 3,5,9


2 Year Warranty
An Industrial Grade Automatic Call Processor eliminates dedicated phone lines by expanding the number of devices you can connect to a single line. Use the Polnet for modems, data and credit card terminals, storage and monitor systems, and more! Typically used for multiple location modem applications. Email us about our RAD (Remote Access Dialer) for use with this equipment.

ACP-3 (Three Devices)
Your Price only $249.00 Delivered*

ACP-5 (Five Devices)
Your Price only $309.00 Delivered*

Other Products


1 Year Warranty
Advanced call management system that routes or blocks calls based on:
• Caller ID
• Fax Tones
• DTMF Touch Tones

Your Price only $399.00 Delivered*

The Power Stone®

1 Year Warranty
A call-activated AC power controller. Reboot and power up/down off-site computers and other devices by phone.

Your Price only $129.00 Delivered*

*Note: All prices include shipping and handling in the US and most of Canada. We reserve the right to charge up to the actual price of shipping on all orders outside the continental United States. All orders shipped UPS Ground unless specified. For air and express shipments, appropriate charges will be applied to your order.

All products are made in the USA.

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Call toll free (866) 337-0965 with your questions or to order by phone.