Comrex BRIC-Link II, Руководство по эксплуатации продукта

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VII.
MAKING CROSSLOCK CONNECTIONS ON BRIC LINK II
Comrex fi rst introduced CrossLock —its technology that creates an addi onal reliability layer to ensure quality
broadcast connec ons—with version 4.0 fi rmware in 2016. As an increasing majority of users updated their units
to CrossLock-capable fi rmware, connec ons made using CrossLock became the norm for Comrex codecs and
are considered standard in BRIC-Link II and ACCESS Codec connec ons. (For details on making basic connec ons
without CrossLock, see the
Quickstart sec on on page 18 .)
HOW CROSSLOCK WORKS: A BRIEF OVERVIEW
CrossLock is available on BRIC-Link II and other Comrex audio codecs running fi rmware version 4.0 or higher. To
understand how CrossLock works, it’s helpful to fi rst focus on non-CrossLock connec ons (as shown in Figure 32 ).
Without CrossLock ac ve, a codec will make BRIC Normal connec ons to BRIC-Link II on port 9000. Audio and
connec on data are then sent over this single network port across the public internet, to be decoded on the far
end.
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Alterna vely, when CrossLock is used, it establishes a Virtual Private Network (VPN) between the hardware on both
the transmi ng and receiving end before a connec on is established. Using this VPN, codecs can transfer much
more informa on than is possible on Non-CrossLock legacy connec ons. This informa on includes network status,
packet loss sta s cs, error correc on parameters, media sta s c informa on to set encoder thro le rates, and
informa on required to establish links over mul ple networks. As shown in
Figure 33 , BRIC Normal connec ons
happen within the CrossLock VPN Layer. The CrossLock connec on between the Comrex hardware happens over a
single port (9001) but the BRIC Normal connec ons take place virtually on their usual legacy ports inside that VPN.