User guide

only powers the Analog modem up for 20 seconds after the last keystroke. When

programming or making changes to the program, make sure you store the new

profile (AT&W).

Host AT-Commands and setting up the host PC Modem

For the host modem side connecting to a fixed CDS-9022A in analog mode, we

suggest leaving the Default String for the cleanest connections, but cellular sites

differ. In most Metropolitan Service Areas (MSA) they may have newer equipment

at their cell site. Connections in Rural Service Areas (RSA) can be a little more

difficult as the noise levels might be high or they may use N-AMP’s, etc.

The CDS-9022A Analog connection is via a V.34 modem chipset (V.32Bis range =

1200bps to 14,400bps). Over analog cellular systems, the best data speed you can

expect is 7200bps to 12,000bps.

For a reliable connection using the Analog modem in the CDS-9022A, you will need to

force your host modem down to V.32. There are many modem manufactures but

there are only a handful of modem chipset manufactures.

Many claim to be Hayes compatible, but one command for a USR modem might

mean something entirely different to a ZOOM modem.

For those of you that are not too familiar with modem AT-STRING and DCE to DTE

speed protocols, setting the DTE speed to 19,200bps will not always force the

modem into V.32 mode. Most V.90 modems will need to be forced into V.32 mode.

Refer to the manufacturers manual for the proper AT-STINGS to force it to V.32

mode. This will make your data connect much faster, and result in cleaner data

throughput.

For AVL and moving vehicles that only grab small files like 2K or less, use 2400bps

or 1200bps, and you will handshake faster as V.22 is much more forgiving.

Generic strings

Courier V-Everything, USR models

If you are running a communication software package in your host device that

communicates with your meters or DTE device remotely, you will need to add this to

your AT-STRING setup.

AT&F1S54=192S56=192S58=33S34=7s27=16&W&W1

Rockwell or Conexant Chipsets (Zoom, Best Data, Diamond and most WIN

MODEMS)

AT&F+MS=V32,1,4800,9600,4800,9600&W

AT&F+MS=9,0,4800,9600,4800,9600&W