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This article lists and briefly describes some of the important identification
codes and parameters that appear in messages or orders. They are shown in
terms of their TIA/EIA/IS-95 identification, name, and description, in that
sequence:
ACC CHAN—Number of Access Channels. This field conveys the
number of access channels associated with the paging channel.
ACC MSG SEQ—Access Parameters Message Sequence Number.
This field conveys the access configuration sequence number, which
is incremented whenever the access parameter message is modified.
ACK REQ—Acknowledgment Required. As part of acknowledgment
procedures this field indicates whether or not an acknowledgment
is required.
ACK SEQ—Acknowledgment Sequence Number. As part of acknowledgment
procedures this field conveys the value of the message
sequence number from the most recently received message requiring
acknowledgment.
ACTION TIME—Action Time. This field conveys the system time at
which the action specific to the message should take effect.
ANALOG CHAN—Analog Voice Channel Number. This field conveys
the channel number of the analog voice channel.
ASSIGN MODE—Assignment Mode. This field informs the mode
with which the channel assignment is to be performed. These modes
comprise traffic channel assignment, page channel assignment, acquire
analog system, analog voice channel assignment.
AUTHBS—Challenge Response. As part of the authentication process
AUTHBS is an 18-bit quantity obtained by the base station through
the authentication signature procedure and sent to the mobile
station.
AUTHU—Authentication Challenge Response. As part of the authentication
process AUTHU is an 18-bit quantity obtained by the mobile
station through the authentication signature procedure and sent to
the base station.
BASE CLASS—Base Station Class. This field conveys the class of service
provided by the base station (public system or some other to be
defined).
BASE ID—Base Station Identification. This field conveys the base station
identification number.
BASE LAT—Base Station Latitude. This field conveys the base station
latitude in units of 0.25 s.
BASE LONG—Base Station Longitude. This field conveys the base
station longitude in units of 0.25 s.
BCAST INDEX—Broadcast Slot Cycle Index. This field conveys the
broadcast slot cycle index (in the range 1 to 7) when periodic broadcast
paging is enabled. The value zero in this field indicates that periodic
paging is disabled.
BURST TYPE—Data Burst Type. This field indicates the type of data
burst in the message. (This is defined in TSB58, Administration ParameterValue
Assignments for TIA/EIAWideband Spread Spectrum
Standards.)
CDMA CHAN—CDMA Channel Number. Each occurrence of this
field conveys the associated CDMA channel number.
CDMA FREQ—CDMA Channel Frequency Assignment. The order
in which this field is included in the message indicates the CDMA
channel containing a paging channel that is supported by the base station.
Each occurrence of this field is set to theCDMAchannel number
corresponding to the CDMA frequency.
CHARi—Dialed Digit or Character. This field conveys the dialed digit
according to the DIGIT MODE.
CODE CHAN—Code Channel. This field conveys the code channel
index (one out of 64 Walsh sequences).
CONFIG MSG SEQ—Configuration Message Sequence Number.
This field conveys the configuration sequence number, which is incremented
whenever the base station modifies the system parameter
message, the neighbor list message, the CDMA channel list message,
or, if sent, the extended system parameters message and the global
service redirection message.
DIGIT MODE—Digit Mode Indicator. This field indicates the code
used for the dialed digits (4-bit DTMF codes using unknown numbering
plan or 8-bit ASCII codes using a specified numbering plan).
DIGITi—DTMF Digit. This field conveys the DTMF digit to be generated
by the base station.
DTMF OFF LENGTH—DTMF Interdigit Interval Code. This field
conveys the value of the requested minimum interval between DTMF
pulses to be generated by the base station.
DTMF ON LENGTH—DTMF Pulse Width Code. This field conveys
the value of the requested width of DTMF pulses to be generated by
the base station.
ENCRYPT MODE—Message Encryption Mode. This field indicates
the encrypting mode (encryption disabled or encrypt call control messages)
to be used for messages sent on the forward and reverse traffic
channels.
ENCRYPTION—Message Encryption Indicator. This field conveys
the mode with which the current message is being encrypted. (This
is maintained for retransmitted messages.) This is made equal to the
content of the ENCRYPT MODE field of the last received channel
assignment message, handoff direction message, or message encryption
mode order.
ERRORS DETECTED—Number of Frame Errors Detected. This field
conveys the number of bad frames in PWR MEAS FRAMES.
ESN—Electronic Serial Number. As part of MSID this field contains
the electronic serial number assigned by the manufacturer to the mobile
station.
FEATURE—Feature Identifier. This field conveys the supplementary
service or feature requested.
FRAME OFFSET—Frame Offset. This field conveys the offset by
which the forward and reverse traffic channel frames must be delayed
with respect to the system timing.
HARD INCLUDED—Hard Handoff Parameters Included. This field
indicates whether or not the mobile station should change the parameters
relative to the hardhandoff(FRAME OFFSET,PRIVATE LCM, ENCRYPT MODE, NOM PWR, BAND CLASS, CDMA FREQ).
IMSI—International Mobile Station Identity. As part of the MSID
this field contains the mobile station identification as specified in
CCITT Recommendation E.212 for mobile station in the land mobile
service.
INIT PWR—Initial Power Offset. This field conveys the correction
factor to be used by the mobile stations in the open-loop power estimate
for the initial transmission on the access channel.
LC STATE—Long Code State. This field conveys the long code state
at the time given by the SYS TIME field of the message.
LP SEC—Leap Seconds. This field indicates the leap seconds that
have occurred since the start of system time.
MCC—Mobile Country Code. As part of the IMSI this field contains
the MCC.
MEM—Message Encryption Mode Indicator. This field enables or
disables analog control message encryption on the analog voice
channels.
MIN—Mobile Identification Number. As part of MSID this field contains
the directory number assigned by the operating company to the
mobile station.
MOB FIRM REV—Firmware Revision Number. This field indicates
the firmware number of the mobile station assigned by the manufacturer.
MOB MFG CODE—Manufacturer Code. This field indicates the
manufacturer of the mobile station.
MOB MODEL—Model Number. This field conveys the model of the
mobile station assigned by the manufacturer.
MOB P REV—Protocol Revision of the Mobile Station. This field
indicates the TIA/EIA/IS-95 version supported by the mobile station.
MOB TERM FOR NID—Foreign NID Roaming Registration Enable
Indicator. This field indicates whether or not the mobile station is
configured to receive terminated calls when it is a foreign NID roamer.
MOB TERM FOR SID—Foreign SID Roaming Registration Enable
Indicator. This field indicates whether or not the mobile station is
configured to receive terminated calls when it is a foreign SID
roamer.
MOB TERM HOME—Home (Nonroaming) Registration Enable Indicator.
This field indicates whether the mobile station is configured
to receive terminated calls when not roaming or when roaming.
MORE PAGE—More Slotted Pages to Follow Indicator. This field indicates
whether or not more slotted page messages should follow
after the current message.
MSG NUMBER—Message Number. This field conveys the number
of the message within the data burst.
MSG SEQ—Message Sequence Number. As part of acknowledgment
procedures this field conveys the value of the message sequence number
for the message in which it appears.
MSG TYPE—Message Type. This field identifies the type of message
or order within the channel. The types of messages or orders conveyed
by the channel will be detailed later.
MSID—Mobile Station Identifier. Thisfield conveys the mobile station
identification.
NA CHAN TYPE—Analog Channel Type. This field indicates the
type of analog channel to be assigned. The types of analog channels
comprise narrow channel 10 kHz below ANALOG CHAN; narrow
channel 10 kHz aboveANALOG CHAN;narrowchannel centered on
ANALOG CHAN; and wide channel on ANALOG CHAN. This is
to comply with the narrowband AMPS in which a 30-kHz channel
encompasses 3 × 10 kHz channels. These are the narrow channels,
whereas 30-kHz channels of the standard AMPS are identified as
“wide” channels.
NGHBR CONFIG—Neighbor Configuration. This field conveys the
configuration of the neighbor base station (if its configuration is the
same as or different from this base station, if it has a paging channel
on the current CDMA frequency assignment, etc.).
NGHBR PN—Neighbor Pilot PN Sequence Offset Index. This field
conveys the pilot PN sequence offset of the neighboring base station.
NID—Network Identification. This field uniquely identifies a network
within a cellular system. (A network is a subset of a cellular
system. It may comprise a set of base stations set up to manage some
special requirements.)
NOM PWR—Nominal Transmit Power Offset. This field conveys the
correction factor to be used by the mobile stations in the open-loop
power estimate.
NUM CHANS—Number of CDMA Channels. This field conveys the
number of occurrences of the CDMA CHAN field.
NUM DIGITS—NumberofDTMFDigits. This field conveys thenumber
of DTMF digits included in the message.
NUM FIELDS—Number of Dialed Digits in the Message. This field
conveys the number of dialed digits included in the message.
NUM MSGS—Number of Messages in the Data Burst Stream. This
field conveys the number of messages in the data burst stream.
NUM PILOTS—Number of Pilots. This field conveys the number of
pilots in the current active set.
NUM STEP—Number of Access Probes. This field conveys the number
of access probes (to be defined later) in a single-access probe sequence
(access probe sequence will be defined later).
ORDER—Order Code. This field conveys the type of order in the
message.
PAGE CHAN—Number of Paging Channels. This field indicates the
number of paging channels on the CDMA channel.
PARAMETER—Parameter Value. This field conveys the parameters
that can be retrieved and set in the mobile station by means of special
messages. Some of these parameters are defined by the TIA/EIA/IS-
95 standard, whereas others are defined by the mobile station manufacturers.
PILOT PN—Pilot PN Sequence Offset. This field indicates the PN
sequence offset, in number of 64 PN chips.
PILOT PN PHASE—Pilot Measured Phase. This field conveys the
phase of the pilot PN sequence relative to the zero offset pilot PN
sequence of this pilot, in units of one PN chip.
PILOT STRENGTH—Pilot Strength. This field conveys the strength
of the pilot used by the mobile station to derive its time reference.
PM—Privacy Mode Indicator. This field indicates voice privacy
requested.
PREF MSID TYPE—Preferred Access Channel Mobile Station
Identifier Type. This field conveys the type of MSID (IMSI, ESN,
IMSI, and ESN) that the mobile station should use on the access
channel.
PRIVATE LCM—Private Long Code Mask Indicator. This field conveys
whether or not the private long code mask is to be used after a
hard handoff.
PWR MEAS FRAMES—Number of Forward Traffic Channel Frames
in the Measurement Period. This field conveys the number of forward
traffic channel frames monitored during a given period.
PWR PERIOD ENABLE—Period Report Mode Indicator. This field
indicates whether or not the mobile station is to generate periodic
power measurement report messages.
PWR REP DELAY—Power Report Delay. This field conveys the period
the mobile station should wait before restarting frame counting
for power control purposes.
PWR REP FRAMES—Power Control Reporting Frame Count. This
field conveys the number of frames over which mobile stations are to
count frame errors.
PWR REP THRESH—Power Control Reporting Threshold. This field
conveys the number of bad frames permitted to be received by the
mobile station in a measurement period before reporting bad frame
reception to the base station.
PWR STEP—Power Increment. This field conveys the step value by
which the mobile stations must increment their transmit power between
successive access probes (access probes will be defined later).
PWR THRESH ENABLE—Threshold Report Mode Indicator. This
field indicates whether or not the mobile station is to generate measurement
report messages.
RAND—Random Challenge Memory. As part of the authentication
process RAND is a 32-bit random value challenge sent by the base
station (access parameters message) and held in the mobile station to
be used by the mobile station for authentication purposes.
RANDC—Random Challenge Value. As part of the authentication
process RANDC corresponds to the eight most significant bits of
RAND.
RANDSSD—Random Data for the Computation of SSD. As part of the
authentication processRANDSSDis a quantity stored in theHLR/AC
associated with the mobile station that is used to compute SSD.
RANDU—RandomChallenge Data. As part of the authentication process
RANDU is a 24-bit quantity generated by the base station.
RECORD TYPE—Information Record Type. This field conveys the information
record type such as display (information to be displayed by
the mobile station), called party number (identifies the called party’s
number), calling party number (identifies the calling party’s number),
connected number (identifies the responding party to a call), signal
(conveys information to a user by means of tones and other alerting
signals), message waiting (conveys the number of messages waiting).
RECORD TYPE—Redirection Record Type. This field conveys the
redirection record type such as redirection to an analog system or
to a CDMA system.
REDIRECT ACCOLC—Redirected Access Overload Classes. This
field conveys the access overload classes of mobile stations that are
to be redirected to a system to obtain service. The mobile station
overload classes comprise the following: normal subscribers, test mobile
stations, emergency mobile stations, and overload classes to be
specified.
REF PN—Time ReferencePNSequence Offset. This field indicates the
PN sequence offset of the pilot used by the mobile station to derive
its time reference.
REG DIST—Registration Distance. This field conveys the distance beyond
which the mobile station should perform a distance-based registration
if the mobile station is to perform such a type of registration.
The null value in this field indicates that this type of registration
should not be performed.
REG TYPE—Registration Type. This field indicates the type of event
generating the registration attempt.
REG ZONE—Registration Zone. This field conveys the zone (group
of base stations within a given system or network) within which a
base station is registered.
RELEASE—Origination Completion Indicator. This field indicates
whether or not the message is used to complete an origination
request.
REQUEST MODE—Requested Mode Code. This field conveys the
current configuration mode (CDMA only, wide analog only, narrow
analog only, and combinations).
RETURN IF FAIL—Return If Fail Indicator. This field indicates
whether or not the mobile station must return to the original system
from which it is being redirected upon failure to obtain service
in the system to which it has been redirected.
SCC—SAT Color Code. This field conveys the supervisory audio tone
associated with the designated analog voice channel.
SCM—Station Class Mark. This field indicates the class with
which the mobile station operates (CDMA mode, dual mode,
slotted class, nonslotted class, power class—class I, class II, class III,
etc.).
SERVICE OPTION—Requested Service Option. This field indicates
the type of special service requested. (This is defined in TSB58, Administration
Parameter Value Assignments for TIA/EIA Wideband
Spread Spectrum Standards.)
SID—System Identification. This field uniquely identifies the cellular
system.
SLOT CYCLE INDEX—Slot Cycle Index. This field conveys the slot
cycle to be used by the mobile station to monitor the paging channel.
This is only applicable to mobile stations operating in the slotted
mode. (A mobile station operating in the slotted mode monitors the
paging channel for one or two slots per slot cycle.)
SPECIAL SERVICE—Special Service Option Indicator. This field indicates
whether special service or default service is requested.
SRCH WIN A—Search Window Size for Active Set and Candidate
Set. This field conveys the search window size (range of PN offsets)
to be used by the mobile station to search for multipath components
of the pilots in the active set and candidate set.
SRCH WIN N—SearchWindow Size for Neighbor Set. This field conveys
the search window size (range of PN offsets) to be used by the
mobile station to search for components of pilots in the neighbor set.
SRCH WIN R—Search Window Size for Remaining Set. This field
conveys the search window size (range of PN offsets) to be used by
the mobile station to search for components of pilots in the remaining
set.
SSD—Shared Secret Data. As part of the authentication procedure,
encryption, and voice privacy, SSD is 128-bit information stored in
the semipermanent memory of the mobile station. It is composed
of two equal-sized parts: SSD A, used to support the authentication
procedures, and SSD B, used to support voice privacy and message
encryption. SSD is not accessible to the user. SSD is generated according
to a given cryptographic algorithm and is initialized with mobile
station specific information, random data, and the A-key of the mobile
station (a 64-bit secret key known only to the mobile station and to its
associated HLR/AC).
SYS ORDERING—System Ordering. This field conveys the order in
which the mobile station should attempt to obtain service from the
analog system (System A only, System B only, System A first, then
System B if the first option was unsuccessful, etc.)
SYS TIME—System Time. This field indicates the system time that
is the time reference used by the system. Except for leap seconds,
the system time is synchronous with the UTC (universal coordinated
time) using the same time origin as GPS time. SYS TIME is set by the
base station as four sync channel superframes after the end of the last
superframe containing any part of this sync channel message, minus
the pilot PN sequence offset, in units of 80 ms.
T ADD—Pilot Detection Threshold. This field conveys the pilot
strength level above which a pilot is to be transferred to the candidate
set. (The candidate set contains the pilots that are not currently in
the active set but have sufficient strength to indicate that the associated
forward traffic channels could be successfully demodulated.)
This triggers the mobile station to send a pilot strength measurement
message.
T COMP—Comparison Threshold. This field conveys the margin by
which the strength of a pilot in the candidate set should exceed that
of the active set so that the mobile station can send a pilot strength
measurement message.
T DROP—Pilot Drop Threshold. This field conveys the pilot strength
level below which the mobile station should start the handoff drop
timer for pilots in the active set and in the candidate set. (The active
set contains the pilots associated with the forward traffic channels
assigned to the mobile station.)
T TDROP—Drop Timer Value. This field conveys the timer value after
which one of the following actions can be taken by the mobile
station for pilots belonging to the active set or to the candidate set
and whose signal strength has not become greater than T DROP: if
the pilot is a member of the active set a pilot strength measurement
message is issued; if the pilot is a member of the candidate set, this
pilot is moved to the neighbor set. (The neighbor set contains the pilots
that are not currently in the active set but are likely candidates for
handoff.)
TOTAL-ZONES—Number of Registration Zones to Be Retained. This
field conveys the number of registration zones the mobile station is
to retain for zone-based registration purposes.
USE TIME—Use Action Time Indicator. This field indicates whether
an ACTION TIME is specified in the message.
VMAC—Voice Mobile Station Attenuation Code. This field conveys
the power level associated with the analog voice channel. | 
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