MODMER / Long Entry

Reference models - Services of SPC exchanges and ISDN

Content:

Introduction
General (system) services
Network services
Operator services
Extension services
Auxiliary ISDN services
Applications
Boss-secretary services

Introduction

We will summarize shortly in this chapter, what kind of services can a SPC exchange and a network built up from SPC exchanges provide for users. ISDN containing SPC exchanges has numerous services for users, which are standardized at the same extent, as the hardware elements. Many of the services are realized in a software way, so these standards are also specifications of the operator program of the exchange.

Services of a SPC exchange can be classified by the following:

Name Description
General (system) services These services related to the whole of the exchange (every line).
Network services Exchanges can be connected to each other through trunk lines. Network services related this way to the generated network.
Operator services Services provided by the operator of the exchange.
Extension services Services to be assigned to the exchange's devices.
Auxiliary ISDN services Services to be assigned to the exchange's devices, standardized by ITU-T..
Applications

Name	Description
General (system) services	These services related to the whole of the exchange (every line).
Network services	Exchanges can be connected to each other through trunk lines. Network services related this way to the generated network.
Operator services	Services provided by the operator of the exchange.
Extension services	Services to be assigned to the exchange's devices.
Auxiliary ISDN services	Services to be assigned to the exchange's devices, standardized by ITU-T..
Applications

General (system) services in catchwords:

Identifier	Name	Description	Implementation
	Automatic connection	Automatic connection of extensions without any operators
	Semi-automatic connections	Connection of extensions with the help of an operator
Pretranslation		Pretranslation on the basis of the first digit of the dialing number /e.g. call of main line, or reception/	Implementation
Customer	More users	Possibility for generating more (logical) exchanges in the hardware of a single exchange.
CDR - Call Detail Recording	Charge settlement
	Identification of a malicious call
	Handling of unsuccessful calls
	Emergency connection
Night service
COR - Class of Restriction		Restriction of requisition of services	Implementation
COS - Class of Service		Generation of class of services	Implementation
Voice Call
Voice Mail			Implementation

	Error determination
	Collection of operation and traffic data
	Remote observation
	Automatic blocking of faulty lines

	Call signaling with pulses and/or with multifrequency DTMF
	Monitoring of the dialing sound
	Special signaling sounds
	Short break /flash/
	Variable timing
	Distinguished ring

Network services:

Identifier	Name	Description	Implementation
Automatic routing		This service directs the outgoing calls automatically (without the cooperation of any operators) toward trunks. .
AAR	Automatic Alternate Routing	in private networks
ARS	Automatic Route Selection	in public networks
Facility Restriction Levels	Restriction of network accesses	This service gives a possibility for assigning access authorities and restrictions to lines and trunks.
AIOD	Automatic Identified Outward Dialing	Transaction of outgoing calls without any operators
DID	Direct Inward Dialing	This service allows for calls coming in through trunks to access extensions without any operators. It can be realized quite easily, if the digit field of the subexchange is integrated to the digit field of the public network exchange. E.g. in case of a seven-digit public network dialing number the first three digits identify the subexchange in the public network, and the last four the device connected to the subnetwork, which is given to the subnetwork from the exchange of the public network by the calling.	Implementation
	Interconnection of trunks

Operator services:

We will not deal with operator services in the framework of this guide.

Extension services

(Identifiers of services were taken from the manuals of exchanges)

Special services, that can be used with function buttons or a special dialing number: ( The attached links point to the usage, programming of the services. )

Identifier Name Description Implementation
Analogous services
Abbreviated Dialing See: Speed Call
Call Appearance
(Originating a Call
Answering a Call) Display of call Requisitable basic services: call initiation, reception of incoming calls, holding calls Implementation
Auto-Callback See: Ring Again
Call Coverage Call coverage, free searching This service provides a possibility for the automatic redirection of a call to another device, if the original device is busy, or nobody picks up the receiver. Implementation
Automatic Dialing Dialing Shortcut: Calling of one or more preprogrammed numbers with the help of a button. Implementation
Call Forward This service provides a possibility for the user to redirect calls arriving to his/her telephone to another device. Redirection can be direct, or indirect (in case of "no answer", or if the device is busy). Park, Transfer, SWCA
Implementation
Call Hold This service allows, that the called person could use his/her telephone for another purpose, suspending the conversation with the calling person (e.g. initation of a new call). Implementation
Hunting "Hunting" for a telephone answering the call This service allows to call a group of telephones with the same dialing number. Exchange displays the call for all of the telephones, until one of the devices answers the call. Implementation
Call Park This service allows to receive a call incoming to a telephone by any other telephones. Forward, Transfer, SWCA
Implementation
Call Pickup
Group Pickup This service allows to receive an incoming call by any of the telephones within a group of devices. Implementation
Call Transfer Transfer of an incoming call to another extension, or to the operator, either in case of unanswered, or an answered call. Implementation
Conference Call Connection with three or more telephones. Implementation
Group Call Call of a group of devices with the same dialing number. (E.g. a tourist bureau.)
Hot line Call of extensions with a determined number by only picking up the receiver.
Last Number Redial Dialing shortcuts: redialing of the last called number. Implementation
Saved Number Redial Dialing shortcuts: automatic redialing of the last recorded number
Message Waiting message lamp A small lamp on the device, which signals, that there is a message waiting in the answering machine.
Private Line - per-coline The user's own main line Assignment of an exclusive main line to a telephone.

Privacy Encryption Assignment of an exclusive main line to a telephone.

Ring Again - Auto-callback This service gives a possibility to ring automatically a previously engaged extension, and generates a connection between the calling person and the called extension. Implementation
Speed Call (Dialing) Dialing shortcuts: A speed call with an abbreviated dialing number (with two or three digits) (system/user) Implementation
Voice Call Loud Calling Calling person can speak to the loudspeaker of the called extension, the called person does not have to pick up the receiver.

Identifier	Name	Description	Implementation Analogous services
Abbreviated Dialing		See: Speed Call
Call Appearance (Originating a Call Answering a Call)	Display of call	Requisitable basic services: call initiation, reception of incoming calls, holding calls	Implementation
Auto-Callback		See: Ring Again
Call Coverage	Call coverage, free searching	This service provides a possibility for the automatic redirection of a call to another device, if the original device is busy, or nobody picks up the receiver.	Implementation
Automatic Dialing		Dialing Shortcut: Calling of one or more preprogrammed numbers with the help of a button.	Implementation
Call Forward		This service provides a possibility for the user to redirect calls arriving to his/her telephone to another device. Redirection can be direct, or indirect (in case of "no answer", or if the device is busy).	Park, Transfer, SWCA Implementation
Call Hold		This service allows, that the called person could use his/her telephone for another purpose, suspending the conversation with the calling person (e.g. initation of a new call).	Implementation
Hunting	"Hunting" for a telephone answering the call	This service allows to call a group of telephones with the same dialing number. Exchange displays the call for all of the telephones, until one of the devices answers the call.	Implementation
Call Park		This service allows to receive a call incoming to a telephone by any other telephones.	Forward, Transfer, SWCA Implementation
Call Pickup Group Pickup		This service allows to receive an incoming call by any of the telephones within a group of devices.	Implementation
Call Transfer		Transfer of an incoming call to another extension, or to the operator, either in case of unanswered, or an answered call.	Implementation
Conference Call		Connection with three or more telephones.	Implementation
Group Call		Call of a group of devices with the same dialing number. (E.g. a tourist bureau.)
Hot line		Call of extensions with a determined number by only picking up the receiver.
Last Number Redial		Dialing shortcuts: redialing of the last called number.	Implementation
Saved Number Redial		Dialing shortcuts: automatic redialing of the last recorded number
Message Waiting	message lamp	A small lamp on the device, which signals, that there is a message waiting in the answering machine.
Private Line - per-coline	The user's own main line	Assignment of an exclusive main line to a telephone.
Privacy	Encryption	Assignment of an exclusive main line to a telephone.
Ring Again - Auto-callback		This service gives a possibility to ring automatically a previously engaged extension, and generates a connection between the calling person and the called extension.	Implementation
Speed Call (Dialing)		Dialing shortcuts: A speed call with an abbreviated dialing number (with two or three digits) (system/user)	Implementation
Voice Call	Loud Calling	Calling person can speak to the loudspeaker of the called extension, the called person does not have to pick up the receiver.

Supplementary ISDN services - (Internationally (ITU-T, ETSI) standardized services)

Identifier	Mnemonic	Standard	Name	Description	Implementation
Number Identification				Supplementary services associated with extension
Direct-Dialling-In	DDI	(ETS 300 064-1)			see also
Multiple Subscriber Number	MSN	ETS 300 052-1		This service allows to associate more dialing number to a private or public extension.	Implementation
Calling Line Identification Presentation	CLIP	ETS 300 092-1)			Implementation
Calling Line Identification Restriction	CLIR	ETS 300 093-1			Implementation
Connected Line Identification Presentation	COLP	ETS 300 097-1
Connected Line Identification Restriction	COLR	ETS 300 098-1
Malicious Call Identification	MCI	ETS 300 130-1
Sub-addressing	SUB	ETS 300 061-1
Call Offering & Diversion
Call Transfer	CT			Transfering the call to an other extension or to the operator.	see also
Call Forwarding - Unconditional	CFU	ETS 300 207-1		Unconditional call forwarding	see also
Call Forwarding - Busy	CFB	ETS 300 207-1		Conditional call forwarding. The called party is busy.	see also
Call Forwarding - No Reply (No Answer)	CFNR	ETS 300 207-1		Conditional call forwarding. No answer from called party.	see also
Call Deflection	CD	ETS 300 207-1
Call Completion
Call Waiting	CW	ETS 300 058-1	Signaling of a waiting call	Service indicates with sound and/or light to the busy station that new call is arriving from an other station. The busy station can hold the current call and may receive the new one.
Call Hold	HOLD	ETS 300 141-1		This service allows that called party initiating an alternative use of his device suspending the communication with caller without releasing the connection. /e.g. initiating a new call/.	see also
Explicit Call Transfer	ECT	ETS 300 369-1
Completion of Calls to Busy Subscribers	CCBS	ETS 300 359-1
Multiparty
Conference Calling	CONF	ETS 300 185-1 -		Communication with three or more participating devices at the same time.	see also
Three Party Service	(3PTY)	ETS 300 188-1	Call setup between two parties with the help of the operator.
Community of Interest
Closed User Group	(CUG)	ETS 300 138-1
Private Numbering Plan	PNP
Charging
Credit Card Calling	CRED
Advice of Charge	AOC	(ETS 300 182-1)
Reverse Charging	REV
Terminal Portability	TP	(ETS 300 055-1);
Freephone	(FPH)	(ETS 300 210-1);
Additional Information Transfer
User-to-User Signalling	UUS	ETS 300 286-1	Data transmission	Data transmission between caller and callee (SMS)

Applications:

We call application in connection with exchanges the "extra" service of the exchange built to a platform.

Boss-secretary services:

The "boss-secretary" device pair is a pair of telephones with services, that can support efficiently the work of a manager and his/her assistant.

For example, a bridged simultaneous extension is applicable for generating a boss-secretary telephone connection with displaying the number of a telephone on another telephone.
Secretary holds the incoming call, then she calls her boss, who "bridges" the secretary's telephone.

We can choose from the services mentioned above by generating services for a boss-secretary device pair.

Perhaps the boss's work is more complex, than the secretary's work, but in this case the secretary's telephone must be more complex, than the boss's telephone.