Ericsson T39 At Command Reference page 216

PDA
Personal Digital Assistant.
Phone Book
A memory in your mobile phone or SIM card where phone numbers can be stored and accessed by name or
position.
Protocols
The rules or procedures all modems must follow to communicate.
Reference Point
Mobile phone and accessory system external and internal reference points.
Result code
A message the Infrared Modem sends to the computer containing information about the state of the Infrared
Modem.
RLP
Radio Link Protocol, an error correction protocol used during radio link connections.
RLSD
Received Line Signal Detect. See AT&C.
RTS
Request To Send. An EIA232 signal sent from the computer to the Infrared Modem, usually indicating that the
computer is ready to send data to the Infrared Modem.
RS-232-C interface
A communication standard established by the Electronics Industry Association (Recommended Standard number
232, revision C). Originally established to standardize communication between computer and modem. It was
later adapted to become a popular standard for communication between computer and any other peripheral
equipment, including other computers.
SC
Service Centre (for SMS).
Serial port
The port through which digital signals are exchanged between the Infrared Modem and the computer.
Short message service (SMS)
A text messaging service permitting the transmission of up to 160 characters to a facsimile, X400, telex and
voice services or mobile phone.
SIM card
Subscriber Identity Module card. It is a card that must be inserted in any GSM-based mobile phone. It contains
subscriber details, security information and memory for a personal directory of numbers. The card can be a small
plug-in type or credit card-sized but both types have the same functions. Your phone uses the small plug-in card.
SIR
Serial Infrared.
SM
1. Short Message.
2. SIM message storage.
Synchronous Communication:
V.22bis
ITU-T standard for 2400 bps.
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