User`s guide

Table Of Contents
TRANSCEIVER REQUIREMENTS
SEHI USER’S GUIDE 2-5
2.4 TRANSCEIVER REQUIREMENTS
When connecting an external network segment via a transceiver to the
SEHI with an EPIM-A, the following requirements must be met:
The transceiver or Ethernet Device to which the module will be
connected must meet IEEE 802.3 standards, and/or Ethernet
Version 1.0 or Version 2.0 standards.
The Signal Quality Error (SQE) test function on the transceiver
must be disabled when it is connected to a repeater or to an
Ethernet Version 1.0 device. In addition, some Version 2.0
equipment does not support the SQE test. Devices that do not
support the SQE test interpret the SQE test pulse as a collision.
2.5 OPERATING SPECIFICATIONS
The operating specifications for the SEHI are described in this section.
Cabletron Systems reserves the right to change these specifications at any
time without notice.
General
Operating System Memory: 1.5 MB
Internal Processor: Intel i960 operating at 16 MHz
Ethernet Controller: National Semiconductor DP83916
Non-Volatile RAM: 32 KB with battery back-up
EPROM: 64 KB
FLASH MEMORY: 1 MB