Arcstar Global ATM Service

Arcstar Global ATM (Asynchronous Transfer Mode) is a cost-effective and reliable solution for multi-services applications that demand medium to high bandwidth on a single network. ATM technology allows efficient share of resources amongst data of different requirements and tolerance on network performance. Batch-mode data like file transfer and delay-sensitive data like voice and video can simultaneously be carried over the network with appropriate prioritization.

ATM supports multiple logical links (virtual circuits) on a single physical access port. Each logical link carries a specific class of data. This simplifies design and operation of networks that require multi-point communication.

Arcstar Global ATM offers a number of service categories, including CBR, VBR and UBR.

Service Category	Description	Applications
CBR Constant Bit Rate	Provides constant bandwidth for real-time applications, comparable to leased line service	Voice, leased line emulation, video
VBR-nrt Variable Bit Rate (non real time)	Provides variable bandwidth for "bursty", non-real-time applications , comparable to Frame Relay service	LAN interconnection, FTP, E-mail and Internet
UBR Unspecified Bit Rate	Provides 'best-effort' type service for non-critical applications. Data is exchanged at an unspecified bit rate, whenever bandwidth is free.	Store and forward networks, messaging, text, data, image transfer

Service Features

• Service categories: CBR, VBR-nrt and UBR
• Speed: T1, E1, 45M to STM1
• Extensive coverage in Asia, Europe and North and South America
• Interwork with Arcstar Global Frame Relay Service to meet different needs between central and remote sites.