T
ROUBLESHOOTING AND
O
NLINE
H
ELP
R
ESOURCES
78
PROBLEM
DIAGNOSIS
POSSIBLE SOLUTION
The modem won’t go off hook
to dial or doesn’t answer the
phone.
Both modems exchange carrier
signals but fail to establish a
link.
Your 56K modem cannot
achieve a 56K Internet
connection.
Your software may not have
auto answer enabled.
You may have a poor line
connection.
Your Internet Service
Provider (ISP) may not be
ITU 56K/x2 technology
capable.
The phone lines in your area
not be compatible with 56K
technology.
There may be devices
between your modem and the
phone jack.
Enable the auto answer feature. In the RapidComm Voice software’s Terminal
mode, type ATS0=1 and press ENTER. NOTE: You need to enable auto answer
before every session unless you alter your software’s initialization string to
permanently enable auto answer.
Try placing the call again. The phone company routes calls differently each time.
To verify a valid phone connection, enter the RapidComm Voice software’s
Terminal mode and type ATX3DT18479825092 and press ENTER (the phone
number is the 3Com BBS). This string bypasses the dial tone, allowing a
connection if the modem is functioning properly.
Check
http://www.3com.com/56k
for a list of ISPs that observe the ITU 56K
standard and/or offer x2
technology. (FCC rules restrict power output of the
service providers’ modems, limiting download speeds to 53 Kbps.)
Call your phone company to determine if this might be the problem. You can also
run U.S. Robotics’ Line Test utility to determine if your phone line is 56K
compatible. Visit our Line Test Web page at
http://www.3com.com/56k
.
Remove all devices between the modem and the phone jack. Make sure the
phone cord you are using is no longer than 12 feet. Use the phone cord included
with your modem.
