Comrex ACCESS MultiRack, Product Manual

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The CrossLock Stats are similar to the information available on the Active Connections graph, which shows
streaming performance without regard to the CrossLock layer. The CrossLock Stats show finer details about network
performance in both directions than can be obtained through the Active Connections graph. CrossLock stats are
shown for both the data being transmitted from the local codec and the data being received by the local codec. All
relevant stats are available for both directions.
PACKET LOSS GRAPH
Figure 19 indicates, in percentage terms, what’s gone wrong on the network during each one-second window.
Three different color-coded entries appear here: 1 Packet Loss (dark red) - The system has detected a packet has
been completely dropped by the network and was never received by the decoder. 2 Packet Late (bright red) - The
system received the packet, but it was too late for decoding and play out. 3 Packet Recovered (green) - The packet
was either lost or late, but was recovered either by the Forward Error Correction (FEC) or Automatic Repeat Query
(ARQ) error correction built into CrossLock.
FIgure 19 pAcket loss grAph
UTILIZATION GRAPH
Figure 20 contains a graph of the outgoing (or incoming) utilization of the network. The bars indicate the average
data rate used by the system during each one-second window. It is possible that the size of these bars will vary
because CrossLock (in some modes) has control over data rate through a technique called “throttling”. Based on
network feedback statistics, CrossLock will reduce or increase the utilization dynamically. If more than one network
device is in use, the utilization graph will be color-coded, indicating the relative utilization of each network device.
The color-code key for each network device appears on the under graph. Overlayed on the network utilization
graph is a gray line. This is the encoder target rate, which reflects the bitrate chosen in the profile used in the
connection. This is treated as a maximum value, so utilization should mostly remain below this line.
FIgure 20 utIlIzAtIon grAph