IBM PC Network

[Paul Koning]

> On May 23, 2021, at 3:18 PM, Lyle Bickley via cctalk <cctalk at classiccmp.org> wrote:
> 
> On Sat, 22 May 2021 23:00:31 -0600
> Grant Taylor via cctalk <cctalk at classiccmp.org> wrote:
> 
>> ...
>> You can find commercial Token Ring cards that support, 4 Mbps, 16 Mbps, 
>> /and/ *100* Mbps.  I see them on eBay monthly.
>> 
>> I heard that IBM developed 1,000 Mbps / 1 Gbps Token Ring in the lab. 
>> But that no commercial products were ever made.
> 
> Here's IBM's "Redbook" on Token Ring:
> 
> "IBM does not view high-speed Token Ring as a requirement for the majority of
> its customers, and therefore the decision has been made not to provide 100
> Mbps high-speed Token Ring uplinks on its products..."

Interesting.  IBM also did quite a lot of work on FDDI, but that's a very different technology than 802.5 (and a better one in many ways).

	paul