AFX-250 Automatic Fax Switch
(430-1244)                 Installation               Faxback Doc. # 19606

Each device that you connect to the phone line draws power from the phone
line.  We refer to this power draw as the device's ringer equivalence
number, or REN. 

If you are using more than one device on the line, add up all the RENs.  If
the total is more than five, your phone might not ring and your answering
machine might not answer. In rural areas, a total REN of three might impair
ringer operation. If ringer operation is impaired, remove a device from the
line.

Your AFX-250 complies with Part 68 and PART 15 of FCC Rules.  You must,
upon request, provide the FCC registration number and the REN to your phone
company.  Both numbers are shown on the bottom of your AFX-250.

You must not connect your AFX-250 to:

    Coin-operated systems

    Party-line systems

    Most electronic key phone systems

The AFX-250 is not compatible with:

    Voice mail services

    Call forwarding services

    Call waiting services

    Fax machines or modems that have a REN greater than 2.0B.

CAUTION:  Be sure to perform the procedures in this section in this order,
          otherwise the AFX-250 might not operate as expected:

1.   Connect to the phone line

2.   Connect your TAD and fax machine or fax modem. 

3.   Connect the AFX-250 to AC power

NOTE:  If the AFX-250's operation becomes erratic, disconnect it from AC
       power, unplug all modular connections, then follow all installation
       procedures in the order they appear.

MAKING THE CONNECTIONS

Follow these steps to connect the AFX-250 to the phone line and your
answering machine (TAD), fax machine, and/or fax modem. 

1.  Plug one end of the AFX-250's modular cord into its LINE jack, and
    plug the other end into your modular telephone line jack.

NOTES:  If your telephone line does not have a modular jack, you must
        update the wiring.  You can convert the wiring yourself, using
        jacks and adapters available at your local Radio Shack store, or
        you can have the telephone company update the wiring for you.  The
        telephone company will charge you for the installation of the
        necessary jacks.  The USOC number of the jack to be installed is
        RJ11C (or RJ11W for a wall plate jack).

        If you have two phone lines and you want to connect the AFX-250 to
        the second line, you must install a triplex modular adapter, such
        as Radio Shack Cat. No. 279-469, and connect the AFX-250 to L2. 
        Follow the installation instructions provided with the adapter.

        You can mount the AFX-250 on a standard modular wall plate or
        directly on a wall using two screws with heads that fit the AFX
        -250's keyhole slots (not supplied).  If you use a wall plate,
        first connect the AFX-250 to the telephone line using a short
        modular cord (not supplied).

2.  To connect a fax machine, fax modem, or fax/data modem, plug its
    modular plug into the AFX-250's FAX jack.

    NOTES:  If you connected a fax/data modem (one that receives both fax
            and data calls), be sure to set the AFX-250 to route data modem
            calls to the FAX jack..

            To ensure optimum compatibility with the AFX-250 and avoid
            disconnected fax calls due to lengthy connection time:

            -  Set the connected fax machine/fax modem's ring number
               feature to its minimum setting (typically 1 ring).

            -  If the connected fax machine/fax modem has a delayed ring
               (or answer) feature, turn it off or set it to the minimum
               delay setting.

3.  To connect a TAD to the AFX-250, plug the TAD's modular plug into the
    AFX-250's TAD jack.  Also, see "Preparing a TAD for Use with the
    AFX-250" on Page 13 and/or below.

NOTES:  If you connect a TAD to the AFX-250, you can connect your telephone
        to the phone jack on the TAD.

        If you do not connect a TAD to the AFX-250's TAD jack, you can
        connect your telephone's modular plug directly to this jack.

        If you installed a triplex adapter, plug your TAD's or telephone's
        modular cord into the adapter's L1/L2 jack.

INITIALIZING THE AFX-250/CONNECTING TO POWER

Follow these steps to connect the AFX-250 to AC power.

CAUTION:  Make sure all of the AFX-250's modular jacks are plugged in
          before you connect it to power.

1.  Plug the supplied adapter's barrel plug into the AFX-250's DC 12V jack.

2.  Plug the adapter's other end into a standard 120-volt AC power outlet.

    CAUTION:  You must use a Class II, 120V AC/12V DC adapter that delivers
              at least 400 milliamps.  Its center tip must be set to
              negative and its plug must correctly fit the AFX-250's DC 12V
              jack.  The supplied adapter meets these requirements.  Using
              an adapter that does not meet these requirements could damage
              the AFX-250 or the adapter.

3.  Route the AC adapter cord through the AFX-250's strain relief slot.

PREPARING A TAD FOR USE WITH THE AFX-250

Setting the TAD's Ring Number

The AFX-250 is preset to direct a call to the FAX jack after five rings.
When you use a TAD with the AFX-250, be sure the TAD is set to answer
within four rings.  If it is not, either change the ring number on the TAD
to 4, or change the ring number on the AFX-250 to at least one number
higher than the TAD's ring number.

Changing the Outgoing Message

Some fax machines/fax modems do not sound the tones required to make the
AFX-250 automatically switch the call and start your fax machine/fax modem.
If you connected a TAD to the AFX-250, we recommend you change the TAD's
outgoing message to include instructions for callers with that type of fax
machine/fax modem, or for those callers who might want to both leave a
voice message and send a fax during the call.

For example:

"Hello.  You have reached 555-4567.  Please leave your name and phone
number at the tone, and we will return your call.  If you want to send us
a fax and you have a touch-tone phone, press one, the pound sign, then one
on your telephone to activate our fax machine, then press START on your fax
machine.  Thanks for calling."

NOTE:  If your TAD's message interferes with the AFX-250's operation (for
       example, calls are not routed properly, the TAD records calls
       intended for the fax machine/fax modem, etc.), re-record the message
       and speak more softly.

OPTIONAL VOICE DATA GUARD

If an extension telephone on the same line as the AFX-250 is in use, the
AFX-250 does not let your fax machine/fax modem access the telephone line
or interrupt the call in progress.

However, to prevent an extension telephone (one not plugged into the
AFX-250) from interrupting a fax transmission that is in progress on the
same line as the AFX-250, you must plug that extension phone into an
optional voice data guard, such as Radio Shack Cat. No. 43-107.

You can use a voice data gurard for these situations:

    When you use cordless telephones, extension telephones, speed dialers,
    computer modems, or other telephone devices on the same telephone line
    as your fax machine/fax modem.

    When your answering machine is too far away to easily connect to the
    AFX-250's TAD jack.

To install a voice data guard, follow its supplied instructions.

NOTE:  You do not need to use a voice data guard with the AFX-250 if your
       TAD automatically stops the outgoing message when you pick up an
       extension phone on the same line as the TAD, and you connected the
       TAD to the AFX-250's TAD jack.


(EB 1/19/96)