From: Monty Solomon <monty%roscom@think.com>
Subject: WorldBlazer throughput
Keywords: Telebit WorldBlazer compression V.42 V.42bis MNP4/5 PEP LZ
Reply-To: Monty Solomon <roscom!monty@think.com>
Organization: Proponent
Date: Mon, 17 Aug 1992 06:27:12 GMT

I noticed in the firmware upgrade instructions that the same EPROMs can be
used in a T1600, T3000, or WorldBlazer!  I didn't realize that the T1600
shared the same hardware.  I wonder if we need to get our T1600s
upgraded as well.

I've recently performed several performance tests using both a Telebit
T2500 and a Telebit WorldBlazer to connect with a remote WorldBlazer
that has the new EPROMs.

The T2500 has the version GF7.03-T2500SA EPROMs.
The WorldBlazer has the version LA5.00W EPROMs.

Here are the results of the tests.

Both WorldBlazers are hardwired for a DTE speed of 38400.
The T2500 is hardwired for a DTE speed of 19200.

The sample file is a large file containing english text in ASCII.
The uncompressed version of the file is 879886 bytes.
The compressed version of the file is 360885 bytes.

The uncompressed version was transmitted both via direct uucp and as
the body of mail messages.

T2500 <-> WorldBlazer PEP appears to max out at approx. 1425 cps.

T2500 <-> WB, PEP, uncompressed data, compression on
sent data 907095 bytes 636.55 secs (1425 cps)
sent data 898526 bytes 631.00 secs (1424 cps)
sent data 898514 bytes 631.56 secs (1423 cps)
received data 907231 bytes 690.81 secs (1313 cps)
received data 907235 bytes 698.99 secs (1298 cps)

T2500 <-> WB, PEP, compressed data, compression on
sent data 360885 bytes 253.26 secs (1425 cps)

WB <-> WB, PEP, uncompressed data, compression off
sent data 906805 bytes 464.74 secs (1951 cps)
sent data 879886 bytes 449.96 secs (1955 cps)

WB <-> WB, PEP, uncompressed data, LZ compression on
sent data 906817 bytes 408.84 secs (2218 cps)
sent data 906809 bytes 385.79 secs (2351 cps)
sent data 906821 bytes 391.59 secs (2316 cps)
received data 906945 bytes 357.23 secs (2539 cps)
received data 906957 bytes 363.21 secs (2497 cps)
received data 906949 bytes 366.45 secs (2475 cps)
received data 906961 bytes 358.19 secs (2532 cps)

WB <-> WB, PEP, compressed data, LZ compression on
sent data 360885 bytes 206.04 secs (1751 cps)
sent data 360885 bytes 213.65 secs (1689 cps)

WB <-> WB, PEP, compressed data, compression off
received data 123711 bytes 67.43 secs (1835 cps)
received data 157017 bytes 85.29 secs (1841 cps)
received data 153413 bytes 83.41 secs (1839 cps)
received data 183755 bytes 99.56 secs (1846 cps)
received data 194403 bytes 105.17 secs (1848 cps)
received data 34405 bytes 19.62 secs (1754 cps)
sent data 360885 bytes 182.15 secs (1981 cps)
sent data 360885 bytes 185.00 secs (1951 cps)
sent data 360885 bytes 183.97 secs (1962 cps)
sent data 360885 bytes 184.28 secs (1958 cps)

WB <-> WB, PEP, compressed data, V.42bis compression on (S191=6)
sent data 360885 bytes 219.02 secs (1648 cps)
received data 181929 bytes 99.50 secs (1828 cps)
received data 178147 bytes 98.08 secs (1816 cps)
received data 174170 bytes 92.91 secs (1875 cps)
received data 159182 bytes 86.03 secs (1850 cps)
received data 191382 bytes 105.49 secs (1814 cps)
received data 180815 bytes 99.77 secs (1812 cps)

WB <-> WB, PEP, uncompressed data, V.42bis compression on (S191=6)
sent data 879886 bytes 415.41 secs (2118 cps)

WB <-> WB, V.32bis, compressed data, MNP4, S111=0, S180=3, S190=0
sent data 360885 bytes 279.55 secs (1291 cps)

WB <-> WB, V.32bis, compressed data, MNP5, S111=0, S180=3, S190=1
sent data 360885 bytes 306.89 secs (1176 cps)

WB <-> WB, V.32bis, compressed data, V.42, S111=0, S180=2, S190=0
sent data 360885 bytes 277.27 secs (1302 cps)

WB <-> WB, V.32bis, compressed data, V.42bis, S111=0, S180=2, S190=1
sent data 360885 bytes 304.50 secs (1185 cps)

-- 
# Monty Solomon / PO Box 2486 / Framingham, MA  01701-0405
# monty%roscom@think.com
Newsgroups: comp.dcom.modems