85
MINIMODEM USB
building installation, plug a telephone into your
modem’s telephone wall jack and listen for a dial
tone. If you hear a dial tone, your modem might
be installed behind a company phone system
(PBX) with an internal dial tone that sounds
different from the normal dial tone. In that case,
the modem might not recognize the dial tone and
might treat it as an error. Check your PBX manual
to see if you can change the internal dial tone;
if you can’t, change your modem’s initialization
string to replace
X4
with
X3
, which will cause
the modem to ignore dial tones.
NOTE
X3 is not allowed in some countries, such as France
and Spain.
• If the modem reports BUSY, the other number
might be busy, in which case you should try again
later, or it might indicate that you have failed to
add a
9,
prefix to the phone number if you must
dial 9 for an outside line.
If you must dial 9 to get an outside line, the easiest
way to dial it automatically is to include it in the
modem’s dial prefix, e.g.,
ATDT9,
. Note the
comma, which inserts a pause before the number
is dialed. By inserting
9,
into the dial prefix, you
do not have to include it in each directory entry.
