Black Box Series 5000 Reference Manual page 18

Introduction
Compression Ratio
Data compression will give a 56/64 Kbps link an effective throughput range from 112/128 Kbps when transferring binary
files, to 364/384 Kbps when transferring graphic files. This increased throughput significantly reduces the bandwidth
required across the WAN link to achieve a given performance level and/or allows the use of lower-cost transmission facilities.
7
6
5
4
3
2
1
0
Figure 1 - 5 Typical Compression Ratios by File Type
400
350
300
250
Throughput in
Kbps 200
150
100
50
0
Binary
Figure 1 - 6 Typical Throughput Over 56 Kbps Link
File Type
Uncompressed
Compressed
Mixture
File Type
18
Graphic