User's Manual

455U Radio Modem Module User Manual
Page 36 © November 2004
 “Only High When Connected” - the DCD signal will be on when the link is connected
and off when the link is reset
 “Pulse Low on Disconnect” - the DCD signal will be normally on but will switch off
momentarily (for 0.5 sec) when the link is reset.
Advanced Settings
These settings may be adjusted if the host device is using AT commands - refer to Appendix
A for an explanation of the different parameters.
S Registers
These are parameter registers settable by AT commands. They do not normally need to be
changed. Refer to Appendix A for an explanation of these parameters.