Cabletron Systems SSIM-A2-01, Installation And User Manual, Page: 10 / 88

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SmartStack SSIM-A2-01/SSIM-A8-01 Introduction
1. Introduction
The SmartStack SSIM-A2-01 and SmartStack SSIM-A8-01 ATM 155 Uplink
Modules from Cabletron Systems provide high-speed connections to the ATM
backbone for the STS16-20RM Token-Ring Switch. Designed for high
performance and low latency, these modules provide connectivity between existing
legacy Token Ring networks and ATM networks.
Note: References to STS16-20RM are also applicable to STS16-20FRM.
The SSIM-Ax-01 module mounts in one of the two front-panel expansion module
slots on the switch. The SmartStack SSIM-A2-01 has a UTP-5 copper shielded
RJ-45 connector interface. The SmartStack SSIM-A8-01 is available for
multimode optical fiber with duplex SC connector.
Figure 1. SSIM-A2-01 Uplink (right) and SSIM-A8-01 Uplink (left)
The modules support Token Ring LAN Emulation (LANE) 1.0, UNI 3.0/3.1/4.0
and Integrated Local Management Interface (ILMI) 4.0.
A single ATM interface can emulate up to 63 Virtual ATM Ports (VAPs), each
implementing a separate LANE bridge (LANE proxy client). Virtual ATM ports
support nearly all of the features of standard Token Ring ports, and are configured
just like any other Token Ring port. Extra configuration options are available for
configuring the LAN emulation and ATM interface options.
The bandwidth of the ATM interface is shared among multiple VAPs.
Additionally, advanced traffic configuration facilities eliminate transmit overloads
and permit the optimization of bandwidth usage.
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