User manual

Appendix-2 TECHNICAL INFORMATION
LED Indicators
The LED indicators show the operating condition of the modem:
GLOSSARY
AAE Automatic Answering Equipment
AM Amplitude Modulation
BPS Characters per second
BSC Byte Synchronous Communication (synchronous protocol)
DCE Data Communication Equipment
DTE Data Terminal Equipment
DPSK Differential Phase-Shift Keying
DTE Data Terminal Equipment (= DTE)
ETX End of Text
FCS Frame Checking Sequence
FM Frequency Modulation
FSK Frequency Shift Keying
HDLC High Level Data Link Control (Synchronous Protocol)
LRC Longitudinal Redundancy Check
MFV Multi-Frequency Dialling Procedure (= Tone Dialling)
MNP Microcom Networking Protocol (Process for Error Checking and
Data Compression)
oK Upper Channel
PM Phase modulation
PSK Phase Shift Keying
QAM Quadratic Amplitude Modulation
Retrain enewed Synchronisation of Modem where Line Conditions have
changed
SDLC Synchronous Data Link Control (synchronous protocol)
Display Meaning and Function (Operating Condition)
POWER Modem is is ready for operation
ONLINE Modem switched to transmission line
DSR Answer tone is present
DCD Modem has recognized carrier tone from remote modem
CTS Modem is ready to send
RTS Transmit request is present
DTR Computer is ready for operation