Acronym

Meaning

AA

Auto Answer Mode

CA

Compression Active

CD

Carrier Detect

CTR

Clear to Receive

CTS

Clear to Send

DC

Data Compression in Use

DSR

Data Set Ready

DTR

Data Terminal Ready

EC

Error Control Active

FAX

Fax Connection

FC

Flow Control

HS

High Speed

LB

Low Battery

MR

Modem Ready

OH

Off Hook

PWR

Power On

RI

Ringing

RNG

Ringing

RTS

Request to Send

RXD

Receiving Data

RD

Receiving Data

SD

Sending (Transmitting) Data

TD

Transmitting Data

TM

Test Mode

TR

Terminal Ready

TXD

Transmitting Data

VFC

Very Fast Mode