GE Corometrics 170 Series Service Manual page 192

Model 115-Compatible Communications Protocols
8-10
Peripheral Devices: RS-232 Connectors
Two options provide backward-compatibility so that the 170 Series Monitor can
operate in a Model 115-compatible communication mode:
115 Update Mode: The 115 Update mode outputs all available information and
ignores requests from a host computer system.
115 Transmit/Receive: The 115 Transmit/Receive mode only outputs data
requested from a host computer system.
When the Model 115 Fetal Monitor was released, many customers developed their
own interfaces for communicating with the monitor. Setting the 170 Series Monitor
to one of these communication modes allows these users to use their existing
interfaces with the 170 Series Monitor as well.
The 170 Series Monitor emulates the Corometrics Model 830 Converter's
implementation of the 115 Communication Protocols. This protocol is named after
the Corometrics Model 115 Fetal Monitor in which it originated.
NOTE: The baud rate must match the external computer; however, the
recommended baud rate is 9600. Lower baud rates may result in some data
loss.
170 Series Monitor
2000947-004
Revision C