Features and Services
TIA/EIA/IS-95 specifications establish two types of features: voice features and short message service features.
The following are the primary voice features.
Call Delivery (CD).CDallows the reception of a call while in a roaming condition.
Call Forwarding Busy (CFB)/Call Forwarding Busy No Answer (CFNA)/ Call Forwarding Busy Unconditional (CFU). CFB, CFNA, and CFU allow a called subscriber to have the system send incoming calls, addressed to the called subscriber’s directory number, to another directory number (forward-to number), or to the called subscriber’s designated voice mailbox. This happens when the subscriber is engaged in a call or service (for CFB active), or when the subscriber does not respond to paging, does not answer the call within a specified period after being alerted, or is otherwise inaccessible (CNFA active). The inaccessibility may be characterized by the following: no paging response, unknown subscriber’s location, inactive subscriber, CD not active for a roaming subscriber, Do Not Disturb active, etc. If CFU is active, calls are forwarded regardless of the condition of the termination.
Call Transfer (CT). CT enables the subscriber to transfer an in-progress established call to a third party. The call to be transferred may be an incoming or outgoing call.
CallWaiting(CW).CWprovides notification to a controlling subscriber of an incoming call while the subscriber’s call is in the two-way state. Subsequently, the controlling subscriber can either answer or ignore the incoming call. If the controlling subscriber answers the second call, it may alternate between the two calls.
Calling Number Identification Presentation (CNIP)/Calling Number Identification Presentation Restriction (CNIR). CNIP provides and CNIR restricts the number identification of the calling party to the called subscriber. The termination network receives the calling number identification (CNI) as part of the basic call setup. This CNI may include one or two calling parties numbers (CPNs), a calling party © 2002 by CRC Press LLC subaddress (CPS), redirecting numbers (RNs), and a redirecting subaddress (RS).
Conference Calling (CC). CC provides a subscriber with the ability to conduct a multiconnection call, i.e., a simultaneous communication between three or more parties (conferees). If any of the conferees to a conference call disconnects, the remaining parties remain connected until the controlling subscriber disconnects.
Do Not Disturb (DND). DND prevents a called subscriber from receiving calls. When this feature is active, no incoming calls shall be offered to the subscriber.DNDalso blocks other types of alerting, such as the CFU abbreviated (or reminder) alerting and message waiting notification alerting. DND makes the subscriber inaccessible for call delivery.
Flexible Alerting (FA). FA causes a call to a pilot directory number to branch the call into several legs to alert several termination addresses simultaneously. The first leg to be answered is connected to the calling party and the other call legs are abandoned.
Message Waiting Notification (MWN). MWN informs enrolled subscribers when a voice message is available for retrieval. MWN may use pip tone or alert pip tone to inform a subscriber of an unretrieved voice message(s).
Mobile Access Hunting (MAH). MAH causes a call to a pilot directory number to search a list of termination addresses for one that is idle and able to be alerted, in a way that only one termination address is alerted at a time.
Password Call Acceptance (PCA). PCA is a call-screening feature that allows a subscriber to limit incoming calls to only those calling parties who are able to provide a valid PCA password (i.e., a series of digits).
Preferred Language (PL). PL provides the subscriber with the ability to specify the language for network services.
Priority Access and Channel Assignment (PACA). PACA allows a subscriber to have priority access to voice or traffic channels on call origination by queuing these subscribers’ originating calls when channels are not available. The subscriber is assigned one of several priority levels and the invocation ofPACAis determined to one of two options: permanent, in which the feature is always available, and demand, in which the feature is available only on request.
Remote Feature Control (RFC). RFC allows a calling party to call a special RFC directory number to specify one or more feature operations.
Selective Call Acceptance (SCA). SCA is a call-screening service that allows a subscriber to receive calls only from parties whose CNPs are in an SCA screening list of specified CNPs.
Subscriber PIN Access (SPINA). SPINA allows subscribers to control whether their mobile station is allowed to access the network. This feature may be used by subscribers to prevent unauthorized use of their own mobile station or fraudulent use by a clone.
Subscriber PIN Intercept (SPINI). SPINI enables subscribers to restrict outgoing calls originated from their mobile station. The subscriber requires a SPINI PIN authorization code to originate calls meeting specified criteria (e.g., international call type). SPINI PIN shall not be required on unrestricted call types (e.g., emergency) and may not be required for a list of frequently called numbers, regardless of their call type.
Three-Way Calling (3WC). 3WC provides the subscriber with the ability to add a third party to an established two-party call, so that all three parties may communicate in a three-way call.
Voice Message Retrieval (VMR). VMR permits a subscriber to retrieve messages from a voice message system (VMS).
Voice Privacy (VP). VP provides a degree of privacy for the subscriber over the base station to mobile station (BS–MS) radio link.
Short Message Service Features
The following are the primary short message service features:
Short Message Delivery–Point-to-Point Bearer Service (SMD-PP). SMDPP provides bearer service mechanisms for delivering a short message as a packet of data between two service users, known as short message entities (SMEs). The length of the bearer data may be up to 200 octets. Implementations and service providers may further restrict this length. The SMD-PP service attempts to deliver a message to an MS-based SME whenever the MS is registered even when the MS is engaged in a voice or data call.
Cellular Paging Teleservice (CPT). CPT conveys short textual messages (up to 63 characters) to an SME for display or storage.
Cellular Messaging Teleservice (CMT).CMTconveys and manages short messages to an SME for display or storage. This teleservice should coordinate the use of the display and arbitrate between conflicting users or services. Each message includes attributes for management of the messages received by the SME.
CDMA ~ Features and services