
                 LEASED LINE SUPPORT Zoom/modems

     Those  Zoom/modems with leased line capability require MANUAL  connect
at  the  beginning of a connection. The manual connect is by  typing  ATX1D
(originate)  and  ATA (receiving modem). The line must be a  2-wire  leased
line. You also may use a ring-down or voice leased line. This kind of  line
RINGs  when  one  end is taken off-hook. Then you may  use  AA  (AutoAnswer
ATS0=1) or let the software answer the RING on the receiving end. You Still
use  the ATX1D on the originate modem. If you use a 'RING' generator  on  a
leased line, the AA (or software answer) will work on a non-ring-down line.

     If you use %E2 (V32bis models) the modems will re-train  automatically
while  on-line, if conditions warrant. You may want to set S10=255  so  the
modem will never hang up if carrier is lost.

>>  On the V32(bis) modems do NOT use &L1 command (keep default &L0). <<



     A  LEASED  LINE normally is just an open line with NO  DIALTONE  &  no
RING,  connected at all times. A modem will not AutoAnswer if there  is  no
RING  into  the  modem.  There is a cheap  part,  which  with  a  momentary
pushbutton  & 5vdc input, will output a 5 watt RING, so should work with  a
normal leased line.

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     You  just  push the button at the same time you dial  with  the  local
modem, and the modem on the other end will AutoAnswer (ATS0=1&W). You  dial
with  ATX1D because there is NO DIALTONE and X1 tells the modem  to  ignore
dialtone.

     Cambridge  Electronics, Sommerville Mass. makes this device.  a  Micro
Module UU-BMR $33, 5-pc $29 (can be had w/ either 5vdc or 12vcd input).
Phone #  617-629-2805.  You can get the push button from Radio Shack.

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NOTE:  devices added to your phone line should be reported and approved  by
the phone company.

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                                   Don Hinds - Zoom Tech

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