4 - network address translation, 5 - filters, 4 - compression – Perle Systems IOLINK-520 User Manual
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Applications
IOLINK-520 & IOLINK-PRO Installation & Applications Guide — 2.51
2.4.3.4 - Network Address Translation
Using private addresses on a network and NAT/NAPT for interactions over an
internetwork connection hides the internal address from the rest of the world. Access is
restricted to only those services that are specifically designated to be available. Please see
section 2.4.2 for more information on Network Address Translation.
2.4.3.5 - Filters
The programmable filtering functions available on the IOLINK-520 & IOLINK-PRO
provide a very powerful means of controlling traffic flow to and from a network. Please see
section 3
Introduction to Filtering for details on how to set-up various filtering
operations.
2.4.4 - Compression
Compressing data allows data throughput rate considerably greater than the physical line
rate. The actual rate achieved will depend on how compressible the specific data is.
Generally, graphics and databases compress up to 600%, text 400 to 500%, binary codes
about 200%.
At line rates above 256 Kbps, compression is not effective as it takes more time to perform
the compression than to transmit the raw data.
Enable compression
Location: Main
!
Configuration
!
Connections up
!
Remote Site Set-up
!
Edit Remote Site
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Protocol Set-up
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CCP parameters
!
Compression
!
Enabled
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