DataBand ISU 512S - I-Mux Service Unit 512k with up to 4 x “S” 4-wire BRI ISDN ports
The DataBand ISU and CSI range connect high speed serial data devices together using multiple ISDN calls, in effect dialling a high-speed “leased line” between non-ISDN devices. The 512S version is available with up to 4 x “S” 4-wire Basic Rate ISDN interfaces and can deliver data rates of up to 512kbps. The “S” BRI interfaces can optionally be individually switched between the standard TE presentation (connects to a carrier-delivered service) and NT presentation (acts like a carrier interface and connects to other ISDN equipment). This feature gives added flexibility on service types and means other ISDN devices can also share the network resources. There is also a version with 2 x “U” interfaces and 2 x “S” interfaces which gives added flexibility if unsure of what ISDN services may be available. Available with 1 or 2 I-Mux serial ports. The ISDN can be partitioned between the 2 ports or access dynamically so 1 port can use all of the ISDN, for example. This gives a great deal of flexibility on potential speeds of different calls. The Cascade option allows the system to be further expanded.