74 Troubleshooting
CTA 500 dm On Line Guide
properties. Ensure ÒUse country and area codeÓ is deselected if
using MP with two dial out numbers.
The PC receives bad data after a data call connection.
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Make sure that the CTA 500dm and the remote device are set to
the same rate adaptation protocol. See
speciÞcationsÓ on page 80
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The remote device may be conÞgured for synchronous
transmission. The CTA 500dm does not support synchronous
operation.
The CTA 500 dm loses data after a data call connection.
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Make sure that the CTA 500dm and PC ßow control methods
match.
SeeÒFlow ControlÓ on page 57
The CTA 500 dm hangs up during a data call.
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Check the setting of the DTR pin. See
page 59
for more information.
Data calls are established but Internal applications time out.
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Check that the settings under TCP/IP properties match those of
your ISP.
Data calls are made using MP and the connected pop-up says
connected@128,000 bit/s but only one channel is active.
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Only one channel may be available at the destination (for
instance if the ISP is busy).
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Check that you are subscribing to an MP capable service.
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Only one channel is available in the outgoing line pool.
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You are active on a voice call. If the voice call ends, a 128 kbit/s
session will be established.
ÒRate adaptation protocol
for more information.
for more information.
ÒDTR OperationÓ on
P0873832 Issue 05