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QMultiFlex-400™ Installation and Operating Handbook
6.2.6
Edit->Service->General->MODCODs Screen
The Edit->Service->General->MODCODs screen is shown in Figure 6-15.
Figure 6-15 Edit->Service->General->MODCODs Screen
When multiple streams are enabled, each stream is associated with its own MODCOD. All
packets that have the specified VLAN ID will be placed into the stream. A stream will be
accorded the bandwidth defined by the CIR and BIR values set in the QoS rules table. The
maximum number of streams that are currently supported is six.
Benefits of using Multiple Streams
Using multiple IP streams in the shared outbound carrier is a useful way of segregating
data for each remote modem so that each remote modem processes only the packets in
the shared outbound that are destined for the particular remote modem.
The streams allow data destined for particular remote modems to be transmitted with the
optimal modulation and code rate (MODCOD) to suit the receive signal strength at the
remote site/sites. Multistreaming works in conjunction with traffic shaping whereby packets
for transmission can be classified according to a wide range of criteria and then transmitted
using the appropriate MODCOD.
6-22
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