V.35 switch for CSU/DSU connections. Supports 17 leads - pins A-F, H, P, R-Y, AA. Works with V.35 interface cables. Guaranteed up to 25,000 switching cycles. It has heavy duty plastic case & sealed rotary switch to prevent dust and moisture, gold-plated contacts and 5 Year Warranty. (Connectors: 3 Female V.35)