Comtech EF Data turboIP-45 - Manual (Page 18)

turboIP-45 Performance Enhancement Proxy Revision 0
Introduction CD/TURBOIP45.IOM
1–6
1.5.1 Minimum Compression Ratio
The compression ratio is defined as the ratio of the sum of the sizes of all TCP segments in an
uncompressed session to the sum of the sizes of the TCP segments if that same session were
compressed. Note that this is different from the definition used in the compression ratio statistic. A
minimum compression ratio of 1.91:1 shall be achieved with the Canterbury corpus and 1.63:1 with the
Calgary corpus, when the data is transferred through the turboIP-45 using FTP.
The turboIP-45 shall never produce a compression ratio less than 1 with any data, that is, the size of the
compressed flows shall always be less than or equal to the size that the flow would have been if
compression were disabled for that flow.
1.6 turboIP-45™ Physical Description and Specifications
Figure 1-1. turboIP-45 Front Panel View
Front Panel Control/LEDs
ON/OFF Recessed power reset switch
POWER Green when power is applied
LAN/LINK Green when LAN Port senses 10/100 Base-T link
LAN/ACT Flashing amber when LAN Port senses Ethernet Activity
WAN/LINK Green when WAN Port senses 10/100 Base-T link
WAN/ACT Flashing amber when WAN Port senses Ethernet Activity
Figure 1-2. turboIP-45 Rear Panel View
Rear Panel Connectors
CONSOLE EIA-232 Female 9-pin for serial console CLI
WAN RJ-45, 10 Base-T/100 Base-T Ethernet, Auto-Sensing
LAN RJ-45, 10 Base-T/100 Base-T Ethernet, Auto-Sensing