Digital Watchdog D2365T Manual de instalación descargar pdf (Pagina 30)

Duet2 D2600 / Duet3 D2650 Installation Manual – EU-D2600-D2650-INST/A10/v1 - 30

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APPENDIX 6

Glossary of Terms

ADSL Asynchronous Digital Subscriber Line

A ‘wideband’ digital communication service from a network provider to a

subscriber that carries a high volume of digital data, most commonly for

internet access. Sometimes called ‘broadband’. An ADSL service is often

provided with a simultaneous analogue PSTN service on a hybrid line.

Analogue PSTN Analogue Public Switched Telephone Network

The analogue national telephone system. Often just called the PSTN.

Service is available to customers on twisted-pair wires that carry a DC

supply provided from the network telephone exchange.

APN Access Point Name

Identifies an external network that is accessible from a mobile terminal.

E.g.The APN for Vodafone is “internet”.

ARC Alarm Receiving Centre

See ARS.

ARS Alarm Receiving Station

A 24 hour manned centre (often privately owned & operated) capable of

receiving and logging calls of alarm and forwarding them to security

authorities and other relevant services. Often called a central station.

Broadband

See ADSL.

Call Clearing

See 3-way-calling.

Call Minder

A call answering service offered by some telecomm Service Providers

where an incoming call to the subscriber’s telephone is not answered.

Central Station

See ARS.

CONTACT I D Contact Identification

An alarm reporting protocol of DTMF tones used to send via an Analogue

PSTN telephone network a transmission to receiving equipment at an

ARC, and to receive checking and acknowledgement replies from that

receiving equipment. The Contact ID protocol is commonly used in

burglar or intrusion alarm equipment. See also DCID.

Digital CONTACT ID Digital Contact Identification

An alarm reporting protocol of data used to send via an Analogue PSTN

telephone network or a digital data network, e.g. VDN, GPRS, GSM data,

a transmission to receiving equipment at an ARC, and to receive

checking and acknowledgement replies from that receiving equipment.

Digital PSTN Digital Public Switched Telephone Network

The digital national telephone system. Service is available to customers

on twisted-pair wires that carries a DC supply provided from the network

telephone exchange, on optical fibre or other digital transmission

medium. The digital service may be in ISDN format or another digital

format.

DTMF Dual Tone Multi Frequency

The series of tones used by telephones to send dialling information to an

analogue PSTN exchange. These tones are also used by the DTMF Fast

Format and Contact ID alarms reporting protocols.

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