Asynchronous Transfer Mode (ATM) development

This technology from a computer networking point of view brings telephony like switching to LANs. ATM's main advantage is that it is fully scalable meaning that the same fundamental architecture applies whether you are dealing with a small in-house LAN, a campus-wide LAN involving many separate buildings, a world-wide corporate LAN involving many sites in different cities all over the world. It means that you can start small and grow gradually without loss of your investment.

With ATM you can specify capacity, source and destination locations in software, and it will allocate the bandwidth as and when needed, optimizing resource utilization. This dynamic allocation of bandwidth is a major benefit at any scale. Which is why ATM is referred to as "bandwidth on demand". meaning that idle capacity anywhere in the network can be brought to bear on a particular transmission anywhere in the local switching area.

The big benefit for corporate users is that band-width at the ATM switch, even 25Mbit/sec, is available to each connected workstation. In an Ethernet LAN the bandwidth 10Mbit to 100Mbit/sec is shared between the users currently on line, and is much lower for each individual user, about 500Kbps for the average LAN. Currently the cost of ATM hardware is prohibitive for most applications. However; there are some applications that need the performance that ATM provides and I'm sure that you are thinking of one right now.

I will be adding whitepapers and links to this page as I get the time if you need more information a good place to start is the ATM Forum, below we have provided a link as well as the phone number to the ATM Forum. Also, Bellcore offers a good computer based course on ATM for about $199. A good book to pickup is: ATM User's Guide by William A. Flanagan (from Flatiron Publishing 1-800-LIBRARY)

Articles and Whitepapers

What is ATM? The ATM Forum (415) 949-6700

Switching to ATM white papers

ATM Switching Structures

Bellcore's home page

Why higher education is moving to ATM today

ATM gain without pain

How to select an ATM/Token Ring Backbone switch

ATM product resource directory

Vendor Product Name Phone Web Address
3Com ONcore (800) NET-3COM
ADC Kentrox AAC-3 FS (503) 643-1681
Adtech AX/4000 (808) 734-3300 Not available
Ameritec Vista Model 155 (818) 915-5441 Not available
Ascom Timeplex Inc Routers & bridges, ATM at 155 Mbps ATM-ICP (800) 669-2298
Bay Networks System 5000 (408) 988-2400
Cabletron MMAC ATM (603) 332-9400
Cascade Communications Cascade 500 (800) DIAL-WAN
Cisco Systems LightStream 1010 (800) GO-CISCO
Computerm VMC 8200 (800) 873-0303
CrossComm XLX (800) 388-1200
Cylink InfoGuard 100 (800) 533-3958
Digital Equipment Corporation DECswitch 400 (800) DIGITAL
Digital Link Premisway ATM (408) 745-6200
Fore Systems ASX-1000 (412) 933-6244
General DataComm APEX (800) 777-4005
General Signal Networks INTERVIEW 8000 (800) 222-0187
GTE Broadband Systems InfoGuard 100 (800) 982-0381
Harris & Jeffries H&J Soft-ATM Source Code (Software for ATM hardware) (617) 329-3200
Hewlet-Packard HP E5200A (800) 452-4844
IBM 8285 NWays (800) IBM-CALL
Litton-FiberCom CAM 7640/7650 adapts T1/E1 and E-3 & DS-3 to ATM (540) 342-6700
MFS Datanet WAVE (800) MFS-4USA
Madge Networks Smart Ringswitch (800) 25-MADGE
MPR Teltech WAVE (800) 555-7700
Net2Net Cell Blaster (508) 568-0600
NetEdge Systems ATM Connect Edge Router (800) NET-EDGE
Network Communications Corporation ATMiniprobe (800) 333-1896
Network General ATM Sniffer (800) SNIFFER
Newbridge Networks 36150 MainStreet ATMnet Switch (800) 343-3600
Northern Telecom Magellan (800) 4-NORTEL
OnStream CS600 (800) 477-7585
Premisys Communications IMACS (510) 353-7600
Radcom RC-200-C (800) RADCOM-4
Scorpio Communications Stinger-5 (212) 221-5998 Not Available
Sprint Frame Relay to ATM Interworking (214) 405-5487
StrataCom IGX 8 (408) 882-2003
Tekelec Chameleon Open (408) 882-2003
Telecommunications Techniques Corp T-Berd 310 (800) 638-2049
Telematics NCX (800) 833-4580
Teleport Communications Group LAN Emulation (718) 355-4990
Trillium Digital Systems, Inc ATM software products & Licenses (310) 479-0500
Wandel & Goltermann DA-30C (800) 277-7404
Whitetree WS3000 (415) 855-0855
Xylan OmniCell (800) 99-XYLAN
Xyplex 7000 (800) 338-5316

ATM Acronyms

(alphabetical from left to right--->)
AAL ATM Adaptation Layer AAL ATM Adaptation Layer
ABR Available Bit Rate AIM ATM Inverse Multiplexer
ANSI American National Standards Institute ASIC Application specific Integrated Circuit


Asynchronous Transfer Mode

BA Buffer Allocatiion
BECN Backward Explicit Congestion Notification BER Bit Error Rate
B-ISDN Broadband Integrated Services Digital Network BN Bridge Number
BOM Beginning of Message CBR Constant Bit Rate
CC Call Control CCITT International Telegraph and Telephone Consultative Committee
CCR Current Cell Rate CDT Cell Delay Tolerance
CDV Cell Delay Variation CE Connection Element
CEP Connection End Point CES Circuit Emulation Service
CI Continuation Indicator CIR Committed Information Rate
CLP Cell Loss Priority CLR Cell Loss Ratio
CL Connectionless Service CO Connection Oriented
COM Continuation of Message CPE Customer Premises Equipment
CPN Customer Premises Network CRC Cyclic Redundancy Check
CRF Connection Related Function CS Convergence Sublayer
DCE Data Communication Equipment DLCI Data Link Connection Identifier
DTE Data Terminal Equipment DXI Data Exchange Interface
EFCI Explicit Forward Congestion Indicator ELAN Emulated Local Area Network
ET Exchange Termination FUNI Frame User Network Interface
GFC Generic Flow Control HEC Header Error Control
HLF Higher Layer Functions ITU International Telecommunications Union
LAN Local Area Network LANE Local Area Network Emulation
LECS LAN Emulation Configuration Server LT Line Termination
MID Message Identifier MSP Maintenance Service Provider
MPOA Multiprotocol Over ATM NNI Network Node Interface
NS Network Supervision NT Network Termination
OAM Operations, Administration and Maintenance OSI Open Systems Interconnection
PCI Protocol Control Information PDU Protocol Data Unit
PHY Physical Layer PMD Physical Medium Dependent
PNNI Private Network-to-Network Interface PRM Protocol Reference Model
PS Protection Switching PT Payload Type
QOS Quality of Service SAR Segmentation and Reassembly
SAP Service Access Point SDH Synchronous Digital Hierarchy
SDU Service Data Unit SEP Signaling Endpoint
SOH Section Overhead SONET Synchronous Optical Network
SVC Signaling Virtual Channel TA Terminal Adapter
TE Terminal Equipment UNI User Network Interface
VBR Variable Bit Rate VC Virtual Channel
VCC Virtual Channel Connection VCI Virtual Channel Idenfifier
VCL Virtual Channel Link VP Virtual Path
VPC Virtual Path Connection VPI Virtual Path Idenfifier
VPT Virtual Path Terminator

Due to the nature of technology most of our pages go through continuous updates. If you have any suggestions or need additional information do not hesitate to contact us.

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