Transceiver Requirements; Operating Specifications - Cabletron Systems SEHI-22 User Manual

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:
Internal Processor:
Ethernet Controller:
Non-Volatile RAM:
EPROM:
FLASH MEMORY:
SEHI USER'S GUIDE
TRANSCEIVER REQUIREMENTS
1.5 MB
Intel i960 operating at 16 MHz
National Semiconductor DP83916
32 KB with battery back-up
64 KB
1 MB
2-5