Tom Zerucha's earlier statement "Analog Cellular is
bandwidth limited so if you get 720 bps you are doing
good." is incorrect. I worked for a major RBOC
cellular carrier for 16 years and was responsible for
cellular data planning and engineering and I assure
you that analog cellular will out perform any current
digital cellular connection for speed and coverage.
Analog cellular voice channels reliably support
4800bps without compression and with compression
14.4bps. In strong signal situations, speeds can be
considerably higher. Use of an ordinary modem with
MNP5 to 10 compression will obtain the higher speeds.
The loss of carrier during cell handoffs is easily
handled by setting the S10 register of the modems on
both ends with ATS10=100.
Recommended init string for various land line modems
are:
For US Robotics / 3 Com modems:
ATS10=200&A3&B1&N2&U2&W&W1 <CR>
For Rockwell chip set based land-line modems 33600 and
lower: AT%E2\N2S7=60S10=200+MS=11,1,1200,4800&w&w1
<CR>
For most other brands: ATN0S37=6S10=200&w&w1 <CR>
For Rockwell chip set based land-line modems 56K V90
models:
AT%E2\N2S10=200S7=60+MS=V34,1,1200,2400,1200,2400 <CR>
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