• ATM Bids

• ATM Network Overview
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Asynchronous Transfer Mode, ATM Network Service

Grow your networking with ATM's capacity, speed, and flexibility

You can easily support multiple applications - video, voice, IP, and data file transfers -- worldwide over a single connection with the multiple CoS provided by our ATM Network Services. Speeds exceeding T-1 or E-1 can be achieved without a full DS-3/E-3 by implementing inverse multiplexing over ATM (IMA) for a cost-effective and reliable solution.

What is ATM technology?

An ATM Network is a high speed networking technology based on two very simple concepts-network conformity and QoS. Information (data, video, Internet and voice) transferred across an ATM network is carried in 53-byte chunks known as cells. The fixed length cell enables ATM to transfer information faster than Frame Relay or Internet Protocol (IP) with the highest degree of data integrity and the lowest degree of latency of any existing networking technology. A 53-byte cell is comprised of 48 bytes of payload (user information) and a 5-byte header. The 5-byte header enables all addressing and QoS information to be tagged at the front of a cell and allows the payload (user information) to be switched, instead of routed, without delay and according to priority. Using a uniform cell structure allows all information to travel the network at a known interval. By putting information from different business applications into cells, the cells can share the same network and still be treated in the same manner without latency or loss of integrity.

Qwest ATM Network Features Include:

Inverse Multiplexing over ATM (IMA): ATM IMA service offers bandwidth options between DS1 (1.544Mbps) and DS3 (45Mbps) levels. IMA utilizes 2 to 8 DS1s and bundles them together to create a solid bandwidth increment from 3Mbps to 12Mbps.

IMA distributes traffic evenly across multiple links to create a single high capacity virtual link that fills the gap for intermediate DS1-DS3 bandwidth requirements, offering an alternative in fiber or DS3 depleted areas and providing a natural progression for customer access in approximately the 3-12 Mbps bandwidth range. QoS levels available with IMA include CBR, VBR-nrt, and UBR.

Frame Relay Service (FRS) to ATM Service Interworking - Interworking PVC (IPVC): ATM IPVC allows FRS and ATM customers to communicate with each other. IPVC will perform mapping from/to the FRS dedicated connection (PVC) to/from the ATM dedicated connection (VCC) utilizing UBR ATM QoS level. IPVC provides flexibility and the customer can use the service (FRS or ATM) best suited for its specific application needs. It enables a migration path for the large number of FRS customer to ATM. IPVC provides customers with the opportunity to balance high bandwidth host or headquarter site application needs (ATM IMA/DS3/OC3/OC12) with less expensive FRS access speeds (DS0/DS1/fractional FR port), Customers can implement ATM at new sites as needed at their own pace and protect their existing service investment.

ATM CLASS OF SERVICE OPTIONS

PORT SPEEDS

• 1.5 Mbps to 622 Mbps

PVC

• 1M to 540M, depending on service option

TRANSMISSION SPEED

• The Global Crossing ATM OC-48 network utilizes dense wavelength division multiplexing (DWDM) to move traffic at speeds up to 2.5 gigabytes per second -- 16 times faster than conventional ATM networks.