Parallel Connector (DB25) Null Modem Adapter. Null Modems have their transmission and receiving lines crossed like in a crossover cable to allow for direct device to device communications. Connect this between two parallel ports on a pair of computers for data link transfers. Additional software may be required. *Monoprice continually strives to improve its product line to bring our customers the best products available. Therefore; changes may be made to listed specifications without prior notice. Item received may not match photo or specs shown.
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