Black Box X.21 LS Multiplexer (TL572A)

So you want a cost-effective way to expand your existing leased-line polled network without adding computers or communication links? Sure, others offer high-speed modem and port-sharing tools, but they probably don't support bi-directional buffering on each port. To get that, you might have to buy additional tail-circuit buffers. The simple, affordable solution is the X.21 LS Buffer from Black Box. Up to four DTE or DCE devices can share the same port, in any combination, using the contention and control protocols normally found in host hardware and software. The ports are DTE/DCE selectable and meet the ITU X.21 Standard, so you can be assured of synchronous operation in the network by both data terminal and data circuit equipment. Once installed, the buffer boosts the efficiency of your system and network by drawing upon the host processor's power and reducing the idle time associated with many host-terminal traffic sessions.??The buffer temporarily stores information sent and re... Minimize