IBM SG24-4817-00 - Manual (Page 50)

This soft copy for use by IBM employees only.
(IEEE 802.3). The maximum number of the LAN Emulation Clients (LECs) is 128
regardless the number of the LES/BUS, so it should be the sum of the LECs
supported by the IBM 8285 when two LES/BUS are used.
The LES/BUS gives an impact on CP performance when running so that the
processor and memory are mainly shared between signaling, BUS and routing.
However, it is designed to prevent the CP traffic from the delay and buffer
accumulation by assigning lower priority to the broadcast traffic.
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ATM Workgroup Solutions: Implementing the 8285 ATM Switch