Last Revised
AST RESEARCH, INC. INFORMATIONAL BULLETIN # 0047 07/28/97
TITLE: Ascentia P and Data Race Internal Modem
SUMMARY
When using the Ascentia P system's internal Data Race modem to
dial another modem, the internal modem may experience connection
speeds of less than 28,800 bps.
This issue affects the following Ascentia P systems: 503302,
503252, 503041, and 503042.
NOTES
The most common reasons for not achieving the highest connection
speeds possible with this and other modems are:
Line noise
Modem-to-modem compatibility
The local loop
Modems are sensitive to noise level relative to signal level, or
signal to noise ratio (SNR). Both V.34 and V.FC modems require at
least a 32-34dB SNR to maintain a 28,800 bps data rate on a
typical channel.
Modems from different manufacturers may have compatibility issues
when attempting to connect with each other at optimal speeds.
A common reason for not achieving 28,800 bps connections
is that the local loop (the length of copper wire that connects
your home or office to the phone company's central office) limits
the bandwidth to less than 3200 Hz.
This issue affects the following Ascentia P systems: 503302,
503252, 503041, and 503042.
TAN 000300DS, 003431PS
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