7.5. Can I connect my Starlan board to an Ethernet?
No, you cannot connect Starlan to an Ethernet network, at
least not directly. Starlan, or in the case of the UNIX PC, Starlan-1
(1BASE5) is a 1Mbps (megabits/sec) network over twisted-pair wire.
The URP protocol is used to communicate over Starlan-1 on the UNIX PC.
The newer Starlan standard is Starlan-10 (10BASE2) and is 10Mbps which
is more *like* Ethernet. The protocol used is the ISO/OSI standard,
and therefore its interconnectability is increased. However, this is
not compatible with the UNIX PC version. There is an expensive item
that AT&T sells, called the Starlan 1:10 Bridge, which connects the
two networks together if this is a necessity, but plan to spend around
$4,500 for the convenience. (AT&T PEC Code: STARLAN 1:10 BRIDGE
2611-005.) According to AT&T Stargroup documentation, there is
software available to interconnect Starlan-10 hardware to Ethernet
using IEEE 802.3, TCP/IP protocol, this of course in conjunction with
the Bridge could connect Starlan-1 via the Starlan 1:10 Bridge to
Starlan-10, and then to Ethernet, a roundabout way, but presumably
If you want to connect your UNIX PC to a *real* Ethernet,
you'll need to hunt down the AT&T UNIX PC Ethernet board. This board
runs a version of the TCP/IP drivers developed by Wollogong. The
board will require the proper cables, as well as a transceiver. This
increases the cost of Ethernet interconnectability. The Wollogong
TCP/IP drivers are an older version not supported by Wollogong
anymore. It's generally acknowledged that there are many bugs, and
the throughput of the board is nowhere near what Ethernet should be
getting. (People report that throughput with the Starlan-1 board was
better than the TCP/IP Ethernet board, which shouldn't be the case.)
Thanks to the hard work of Roger Florkowski
(cs.utexas.edu!taliesin!roger), UNIX PC Starlan users don't have to be
limited with just uucp'ing and cu'ing over the network. He has ported
and created a bunch of BSD network utilities (r* commands). His
package, (bsdslan.cpio.Z on OSU-CIS) allows one to do remote tape
operations, remote copies, and remote shell commands.
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