GE Medical Systems MAC 1200, Operator'S Manual, Page: 80 / 180

5-20 MAC 1200 Revision B
2012250-022
Recording in 12 Lead Mode: ECG Transmission
Cart to Cart Communication
Via modem, ECG data can be transmitted between two MAC 1200 units
or between a MAC 1200 and any ECG recorder using the CSI protocol
(see
“Transmission via Modem” on page 5-12 and “Transmitting Data to
a MUSE CV System Via Modem” on page 5-16).
Modem Setup (for Modem
→
Other)
If you prefer to use another modem than the standard models listed in
the Setup menu (MultiTech, Elsa), you will have to enter a few
parameters required for communication between the MAC 1200 and the
modem.
For the AT commands which your modem understands, please refer to
the modem user instructions. Three command sequences have to be
entered, each of which defines a specific modem operating state.
1. The modem is initialized (init string).
2. A communication link is established (dial string).
3. The communication is terminated (hangup string).
These three strings are entered in the modem setup menu. (See Chapter
3,
“Connecting Peripheral Equipment” )
The example below shows the command strings for the MultiTech ZDX
modem.
AT Command for Modem Initialization
Symbol Description
AT Prefix that precedes every command line
&F Fetch factory configuration (loads the factory configuration from ROM into the
active configuration memory (RAM))
M1 Speaker is always on
X3 Call progress signal monitoring enabled
S0=1 Auto answer after one ring
V0 Digit result codes selected (0 to 999)
init string: AT&FM1X3S0=1V0