ATM

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atm

(mechanics)

ATM

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

atm

Abbr. for “atmosphere.”
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

ATM

(communications)

ATM

(2)
Automatic Teller Machine - a cash dispenser.

ATM

(chat)
At the moment.

ATM

(text)
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

ATM

(1) See also ATM machine and Adobe Type Manager.

(2) (ATMosphere) A measure of pressure. See atmosphere.

(3) "At the moment." See digispeak.

(4) (Asynchronous Transfer Mode) A local area and wide area network technology stemming from the telephone world that supports quality of service (QoS) for real-time voice and video. In the early 1990s, ATM was touted as the future multimedia transport starting at the desktop. A decade later, ATM was being replaced by Internet protocols (see IP and MPLS). Adapters for PCs were expensive, and standards for connecting legacy networks were confusing. When Gigabit Ethernet debuted at the end of the 1990s with a familiar technology and 10-fold speed increase, ATM's demise as a LAN was assured. However, ATM was deployed as a backbone technology in major telcos and ISPs.

Fixed-Size Cells and Logical Circuits
ATM transmits 53-byte cells that can be processed very quickly, and the small cell ensures that voice and video can be inserted into the stream for real-time transmission. ATM uses switches that establish a logical circuit from end to end. However, unlike the dedicated circuits of legacy telephone switches, unused bandwidth in ATM's circuits can be appropriated as needed. For example, idle bandwidth in a videoconference can be used to transfer data.

Five Service Levels
Constant Bit Rate (CBR) guarantees bandwidth. Real-time Variable Bit Rate (rt-VBR) supports multimedia, and non-real-time Variable Bit Rate (nrt-VBR) is used for bursty traffic. Available Bit Rate (ABR) adjusts bandwidth according to LAN congestion levels, and Unspecified Bit Rate (UBR) provides the best effort for non-critical data. See MPOA.


ATM in the Large Enterprise
ATM was used as a network backbone ("switch fabric") in some large enterprises. The edge device is an Ethernet switch, and the LANE (LAN Emulation) driver converts Ethernet frames into ATM cells. See LANE.







ATM in the Internet
ATM has been used by carriers and ISPs as the backbone between points of presence (POPs) and at interconnecting points (see NAP and MAE). Highly scalable, ATM supports transmission speeds up to 10 Gbps but can run as slow as 9.6 Kbps between ships at sea. When a new ATM switch is added, it is automatically updated using ATM's PNNI routing protocol.







Where ATM Fits In
ATM functions at layer 2 of the OSI model and converts its cells into SONET frames (see OC) or T-carrier frames (see DS).
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References in periodicals archive ?
Eclipse Cash Systems is a nationally recognized independent sales organization that has been providing full-service ATM solutions since 2003.
Fonacier said the BSP has provided banks the guidelines and the pricing modality if they plan to increase the amount of ATM fees the charge, currently P10-P15 per transaction for non-clients.
'On the news of ATM fees, bank customers should not bear higher costs because ATM operations should in fact be an added service, and banks should compete to give the best service possible,' Lopez said.
This has led detectives to believe that the ATMs might have been hacked into, by a cybercrime ring that has become a headache to banking systems of late.
The high-tech crime known in cybercrime lingo as ATM jackpotting has been used to steal more than Sh100 million in the US over the last one year.
A sign at the store in Islington, North London, says: "As soon as we can change to another ATM supplier we will do so.
Continuing Professional Education (CPE) remains a shared commitment between a member and ATMS and an essential component for ATMS Accredited Membership.
In April this year, the Reserve Bank of India (RBI) imposed stringent guidelines for ATMs service providers or their contractors followed by the Union Ministry of Home Affairs issuing similar directives vide gazette notification to be implemented by February 9.
In total, around 100 protected ATMs have been identified as no longer transacting between February and August - but there may be various reasons why many would not need replacing, such as they may be near a Post Office which has free access to cash or located on premises which are not open to the public generally.
Plasencia added that with the Dolphin Debit ATMs, if there are any machine issues, technicians respond immediately to fix the problem and the credit union doesn't have to be concerned with managing them on a day-to-day basis.
DBP president and chief executive officer Cecilia Borromeo said the newly-installed DBP ATM is the first and only ATM machine located at the world-famous tourist site.
Focusing on new ways to service customers continues in the ATM channel.