18 Jun
2020
18 Jun
'20
2:39 p.m.
Paul Koning wrote:
There is conflicting information about what exactly the interface I have
which is fitted in a MicroVAX 3100 is called. It looks most likely to be a
DSH32 or a DSH32-B which may amount to the same thing but it could also be
a DST32 which may also amount to the same thing... Documentation suggests
that the synchronous interface part of a DSH32 (which for added confusion
is referred to as DSH32-S) is DSV11 compatible but limited to a maximum
of 19200 bps.
The modems I have (which were intended for use with 64 kbps lines attached
to Cisco routers) don't have jumpers for clock speeds lower than 48 kbps.
Regards,
Peter.
On Jun 18, 2020, at 2:14 PM, Peter Coghlan via
cctalk <cctalk at classiccmp.or
...
As I mentioned in another reply, I have a pair of baseband synchronous mode
and were it not for a speed incompatibility between them and the MicroVAX
synchronous serial interfaces I have access to, ...
I'm curious about that. Synchronous modems supply the bit clock to the
interface. So a synchronous interface works at whatever speed the modem
delivers, so long as it's not too fast for the interface. What are the
Microvax sync interfaces you have? DMV? DUV? A DMV will work at up to
56 kbps.
paul