IBM SG24-4817-00 manual ATM 12-Port 25 Mbps UTP Concentrator Module, Sample Scenarios

This soft copy for use by IBM employees only.

4.3 ATM 12-Port 25 Mbps UTP Concentrator Module

The ATM 25 Mbps UTP Concentrator Module is a single-slot concentrator module that provides low-cost access to a high-performance ATM network. It is ideal for upgrading your legacy LAN users and for providing higher performance to new users.

It has the following characteristics:

•12 Forum-Compliant ATM 25.6 RJ-45 ports capable of supporting shielded and unshielded twisted pair cabling.

•Supports user-to-switch, server-to-switch, and switch-to-switch connections in any combination.

•Supports ATM Forum Available Bit Rate (ABR) Service using Explicit Forward Congestion Control (EFCI) marking.

•Has a large 8,000 cell buffer to smooth bursts of traffic without triggering congestion control mechanisms.

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Supports UNI 3.0, UNI 3.1, and UNI translation.

Expands IBM 8285 Nways ATM Workgroup Switch capacity up to 48 ports with optional 8285 Expansion Chassis (FC# 5502).

4.3.1 Sample Scenarios

The ATM 12-Port 25 Mbps UTP Concentrator Module is a high-performance card that is very cost-effective for connecting high-bandwidth users and servers into a workgroup or an ATM network. In addition, it can be used to provide redundant links to a backbone or server to provide higher bandwidth and improved reliability. Figure 12 on page 39, Figure 14 on page 41, and Figure 13 on page 40 show some ways the ATM 12-Port 25 Mbps UTP Concentrator Module can be used with the 8285 switch.

38ATM Workgroup Solutions: Implementing the 8285 ATM Switch