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Zhone Technologies, Inc. IMACS Product Book, Version 4
March 2001 Page 87
56/64K
FRAD
Data Proc
Application
FEP
HEAD OFFICE DATA CENTER
IMACS
Router
T1 Frame
Relay
Frame Relay
Network
FRAD
FEP
56/64K
56/64K
BRANCH OFFICES
Figure 36—Frame Relay Concentration at Corporate Headquarters
5. ATM SERVER CARD
Although ATM is being touted as an ubiquitous technology for all business communications services, the reality is
that it is playing a significant role so far only in backbone campus network for LAN applications for local transport.
This section highlights the benefits of the various applications of the IMACS 882060 ATM Server card and
demonstrates how it can effectively and efficiently to deploy various services. The ATM Server Card provides the
ability to provision legacy voice, data, and video services over an ATM backbone via a DS3, multi-mode and single-
mode.
The ATM Server card includes support for efficient, standards-based ATM adaptation of a multitude of legacy
traffic types. Examples include analog key systems, routers, video codecs and PBXs. Legacy traffic is directed from
T1, E1, data and voice interfaces to the ATM Server, which then provide ATM adaptation and encapsulation. By
providing direct, integrated connectivity to the ATM network, the IMACS eliminates the need to run parallel
networks for ATM and TDM traffic. The ATM Server Card is based on standards adopted by the ATM Forum and
the ITU. These standards allow the IMACS ATM Server to inter-operate with a wide variety of ATM switches and
to adapt multiple traffic types for aggregation and transmission across an ATM network. Some of the well-known
switches include those from FORE, Lucent, NORTEL, GDC, ADC Kentrox.
Since the ATM Server Card fits in any IMACS server slot, service providers can deploy the IMACS in non-ATM
access networks today, and easily migrate to ATM based access by simply adding an ATM Server Card. The ATM
Server Card, combined with the wide range of interfaces on the IMACS, provides the most flexible platform for
service provisioning in the market today.
The following is a list of the ATM server card key benefits:
• Standards-based ATM adaptation for voice, video, and data. This feature enables the IMACS to adapt the
traffic from a wide variety of legacy interfaces to ATM. Therefore there is no need to upgrade or replace
existing equipment while migrating to ATM solutions. This results in significant savings in capital expenditure.
• Interoperable with deployed ATM switching equipment such as ADC Kentrox, Fore Systems, Lucent, etc. This
is a key selling point of the ATM server. Because of its interoperability with already deployed ATM switching