Cabletron Systems SEHI-34 Manual Do Utilizador
INSTALLATION REQUIREMENTS/SPECIFICATIONS
Page 2-17
2.6
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.
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
DP83916
Non-Volatile RAM:
32 KB with battery back-up
EPROM:
64 KB
FLASH MEMORY:
1 MB
Delay Times (Start of Packets):
Twisted Pair to EPIM- A
1.10 microseconds
Twisted Pair to Twisted Pair
1.00 microseconds
EPIM-A to Twisted Pair
1.00 microseconds
Delay Times (JAM):
Twisted Pair to EPIM-A
960 nanoseconds
Preamble:
Input:
Minimum of 40 bits required
Output:
64 bits min. (last 2 bits are 1, 1)