Can any one guide me how to get AB DH+ specification.
Local A-B sales office or dist.
Try www.ab.com and search for a manual called: "Data Highway/Data Highway+/Data Highway II/ Data Highway-485 cable Installation Manual". For troubleshooting also look under ab's knowledgebase for document# 7832. Last but not least look under SST web www.mysst.com site for a document called: "Technical Aspects of Data Highway Plus", also very good.
Xerox never comes up with anything original.