PERFORM.TXT rev. 1.1 from Supra Tech Support BBS (503)967-2444 12/14/93 phm Non-Error Correction & MNP 2-4 Carrier Rate Nominal non-compression transfer in cps* ------------ ---------------------------------------- 1200 120 2400 240 4800 480 7200 720 9600 960 12000 1200 14400 1440 16800 1680 19200 1920 21600 2160 24000 2400 26400 2640 28800 2880 *Assuming "clear" telephone lines (no or little re-sent data between modems) and no performance limitations on the devices connected to the test modems. CPS rate figured based on CarrierRate x .1 with 8 data bits, One stop bit and No parity. (Your real rates may be somewhat lower.) V.42 performance (Nominal) Carrier Rate Nominal non-compression transfer in cps* ------------ ---------------------------------------- 1200 142.2 2400 284.4 4800 568.8 7200 853.3 9600 1137.6 12000 1422 14400 1706.4 16800 1990.8 19200 2275.2 21600 2559.6 24000 2844 26400 3128.4 28800 3412.8 *Assuming "clear" telephone lines (no re-sent data between modems) and no performance limitations on the devices connected to the test modems. V.42 rate figured based on CarrierRate x .1185 with 8 data bits, One stop bit and No parity. (Your real rates may be the same or lower.) MNP 5 Carrier Rate MNP5 Compression Transfer Rate Range in cps* ------------ -------------------------------------------- 1200 90 to 210 2400 180 to 480 4800 360 to 960 7200 540 to 1260 9600 720 to 1680 12000 900 to 2100 14400 1080 to 2520 16800 1260 to 2940 19200 1440 to 3360 21600 1620 to 3780 24000 1800 to 4200 26400 1980 to 4620 28800 2160 to 5040 *Assuming "clear" telephone lines (no or little re-sent data between modems) and no performance limitations on the devices connected to the test modems. MNP5 rate figured based on CarrierRate x .75 to CarrierRate x 1.75 with 8 data bits, One stop bit and No parity. (Your real rate will be based on the normal connection issues, as well as both the compressability of the data and the specific data being transfered.) MNP5 ideally supports 2:1 compression, but has been known to expand the data packets as well. V.42bis Performance (Nominal) Carrier Rate BTLZ Compression Transfer Rate Range in cps* ------------ -------------------------------------------- 1200 142.2 to 450 2400 284.4 to 900 4800 568.8 to 1800 7200 853.3 to 2700 9600 1137.6 to 3600 12000 1422 to 4500 14400 1706.4 to 5400 16800 1990.8 to 6300 19200 2275.2 to 7200 21600 2559.6 to 8100 24000 2844 to 9000 26400 3128.4 to 9900 28800 3412.8 to 10800 *Assuming "clear" telephone lines (no or little re-sent data between modems) and no performance limitations on the devices connected to the test modems. V.42bis (BTLZ) rate range figures based on CarrierRate x .1185 (normal rate for v.42 mode without any available compression) to CarrierRate x .375 with 8 data bits, One stop bit and No parity. (Your real rate range may be based on both the normal v.42 connection issues, as well as the compressability of the data.) The ideal maximum compression 4:1. ** ONLY MNP5 can have any negative affect on the data transfer speed **