Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!spool.mu.edu!snorkelwacker.mit.edu!bloom-beacon!eru!hagbard!sunic!mcsun!hp4nl!ecn!kaandorp From: kaandorp@ecn.nl (Sjaak Kaandorp) Newsgroups: comp.sys.dec Subject: Search for a replacement of DU-11 Message-ID: <1991Apr4.145948.7444@ecn.nl> Date: 4 Apr 91 14:59:48 GMT Article-I.D.: ecn.1991Apr4.145948.7444 Reply-To: kaandorp@ecn.nl (Sjaak Kaandorp) Organization: Netherlands Energy Research Foundation ECN Lines: 24 Our institute has some datacommunications links with remote sites. At the remote sites are special developed hardware which implements a synchronous protocol. Local we have a PDP11 with a DU-11. The synchronous protocol is of our own design, so it is not DDCMP, HDLC, etc. The PDP11 will be replaced by a VAX4000/300. Our problem is that we can't find a replacement for the DU-11. What we looking for is a fully programmable synchronous interface with DMA capability for the microbus. The Digital interfaces are not suitable because they work only with standard protocols like DDCMP, HDLC, SNA, etc. Does anyone knows a non-Digital interface suitable for this application or has anyone any susgestions for another solution. Please mail your response also to me personally: kaandorp@ecn.nl (Our NEWS system isn't that reliable.) -- --- / *** .......... Sjaak Kaandorp | ***** ....... \ *** ...... Netherlands Energy Research Foundation ECN