DIY solution for using 6pin RJ12 cables to extend your Serial (DB9) connections. 6 conductors. DB9 (common name) a.k.a DE9 (proper designation) 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. Support Files: Pinout and Dimensions Diagram (Dec 21; 2010)