Patton electronics SmartNode Series Software Configuration Manual page 389

SmartWare Software Configuration Guide
• Codecs other than G.711 compress the voice streams. They are optimized for compressing voice and not
data. Compress and decompressing always incur loss of data.
• Dejitter buffers are optimized to force little voice delay, therefore data could be lost.
SmartWare implements two solutions to solve this problems on fax transmission:
• Fax (or modem) bypass—Selects automatically a fallback codec with no or little compression and reconfig-
ures the dejitter buffer for sending and receiveing fax.
• Fax relay—Terminates the fax protocol on the SmartNode and sends the reference data over a fax protocol
(T.38) to the receiver. Fax relay has a smaller bit- and error-rate than bypass, but the remote endpoint must
support the same fax protocol as well.
Figure 80 illustrates the difference between Fax relay and Fax bypass.
The commands described below offer more functionality than fax only. Modem connections could be config-
ured in the same manner as fax. For a list of all available protocols use the CLI help.
This procedure describes how to configure fax bypass.
VoIP profile configuration task list
Figure 80. Fax relay and Fax bypass
30 • VoIP profile configuration
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