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.