Ambulatory Blood Pressure Monitor 90217 Service Manual
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90217 Modem Connection Status Indications
The left-most digit of the 90217 display shows the various stages of the modem connection
process:
1 Sending modem identify query.
2 Waiting for response to identify query.
3 Sending modem reset commands.
4 Sending modem setup commands.
5 Send off-hook command.
6 Waiting for contact.
7 Contact established.
9 Not attempting to contact modem.
Once contact has been established, the second digit from the left on the 90217 display indicates
the baud rate of the connection. On high speed modems, the indicated speed refers to the
connection between the ABP monitor and the modem. The two modems may be communicating at
some speed other than that at which the modem is communicating with the monitor.
The baud rate codes are as follows:
0 1200
1 not used
2 2400
3 4800
4 9600
5 19.2 k
6 38.4 k
Setup Test
Note:
Verify that all cable connections are installed correctly and are connected securely.
Switch the ABP monitor ON. It initially displays 9999. When the monitor is being read or initialized,
these digits change to indicate that communication is taking place between the monitor and the
analysis system. When communication is complete, the digits stop changing.
The right-most digit indicates that a message has been sent from the monitor to the base station.
The second digit from the right indicates that a non-garbled message has been received by the
monitor. A common failure mode is with only the right digit spinning. This indicates garbled
messages are being received and an “I don’t understand” response is being transmitted by the
monitor.
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