Chapter 1 – Introduction
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
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MDN
Mobile Data Number or the mobile phone number.
MIN
Mobile Identification Number or mobile user account number.
MNC
Mobile Network Code. A pre-defined 2-digital number that represents a sub-network in the IMSI (usually set
to “00”).
MO
Mobile Originated. An action (usually a call) that is first started from the phone. An outgoing call or SMS.
MS
Mobile Station. The term MS is commonly used to represent the phone or mobile.
MT
Mobile Terminated: An action that is initiated from a land based network. An incoming call or SMS.
MSM
Mobile Station Modem.
NAM
Number Assignment Modem. The NAM is collection of internal parameters that define a working phone for a
given network (phone number, access parameters, etc.).
NID
Network ID. The NID is an identification number that represents geographic location of a common coverage
area; but is a subset of the SID, usually a neighborhood in a large city. NID is usually not used and is set to
zero. Also see SID.
NV-RAM
Non-Volatile Random Access Memory, NV-RAM is a data storage device that does not lose its data when
power is turned off.
OTAPA
Over The Air Parameter Administration. An automatic update in internal software parameters (PRL for
example) by means of a specially defined CDMA data call that is mobile terminated (MT).
OTASP
Over The Air Service Programming. An automatic update in internal software parameters PRL; for example,
by means of a specially defined CDMA data call that is mobile terminated (MT).
PD
Position Determination. Process by which the mobile GPS position is obtained.
PDU
A GSM SMS standard where any type of binary data can be transported via an SMS message. In the CDMA
system, the PDU mode is not supported; instead, the Unicode format message is supported.
PN Offset
Pseudorandom Noise Offset: In a CDMA network the PN offset is a variable time delay offset of a repeating
random noise generator that is used to distinguish individual sectors of a base station.
P-REV
The CDMA revision of the mobile or base station.
PRI
Product Release Instructions. Carrier specific information required for activation on a CDMA network.
PRL
Preferred Roaming List. The PRL is a collection of frequencies, SIDs and NIDs that the call processing
software uses to search for approved and unapproved CDMA networks. The PRL is loaded into the phone
and is saved in NV-RAM.
PSTN
Public Switching Telephone Network. The traditional telephone network.
RF
Radio
Frequency.
RSSI
Receive Signal Strength Indicator: This parameter represents the total RF received signal power from the
base station(s) the mobile sees..
R-UIM
Removable User Identity Module
– The R-UIM is similar to a subscriber identity module (SIM), but
designed for networks other than GSM (global system for mobile telecommunications), such as CDMA.
The R-UIM card contains user information and data features on a removable smart card about the size of a
postage stamp. It is a dual-mode solution that can store both GSM provisioning and CDMA provisioning on a
single card. When used with a GSM handset, the R-UIM operates like a GSM SIM.
SID
System ID. The SID is an identification number that represents geographic locations of a common coverage
area, usually a large city. Also see NID.
SIM
Subscriber Identity Module.
A SIM card is a portable memory chip. The SIM holds personal identity
information, cell phone number, phone book, text messages, and other data.
SMS
Short Messaging Service; A supplement service that is capable of sending and receiving short length text
messages to/from the mobile.
SREJ:
Selective Reject. An optional feature of V.42 which enhances data throughput on noisy connections. As data
blocks are sent out, the remote side acknowledges only after an agreed upon number of blocks are received
(window size). If any block is received bad, the sender is notified of the rejected bad block so it can be
retransmitted.
TA/TE
Terminal Application/Terminal Equipment. This is the end “device” (combination of hardware and software)
that communicates with a modem via a serial link. In this context, it is the device (PDA/Computer) connected
to the WISMO Quik. Also see DTE.