Check the listing for details. Cisco HWIC-1DSU-T1 1-Port T1 DSU/CSU Module, 1 Year Warranty. Condition: Used. Listed at 6.90 USD. This Listing includes (1) Cisco HWIC-1DSU-T1 that is Fully Tested with our 1 Year Warranty. The HWIC-1DSU-T1 also offers an integrated CSU/DSU, simplifying configuration and management. Integration allows management of the router and CSU/DSU as a single SNMP entity while also providing detailed troubleshooting capabilities. Troubleshooting features include self-test, loopbacks, CSU/DSU reset, alarm counters, and T1 statistics. About Us We test all our gear in, and ship from, our warehouse and testing center in Omaha, Nebraska. We offer a 1 year warranty on all products sold, no matter which of our portals you choose. However you find us, you will know you have the backing of our warranty. Here are a few other things to keep in mind, as you shop and buy from us. We try to ship out same day the order is received. If we can't, we try to let you know when it will ship out. 1 Year Warranty (30 Day Warranty for Resellers) On Ebay we only accept Paypal. All units are in good condition, refurbed in house, painted as necessary. Free ground shipping (within the 48 contiguous states). We collect sales tax in Nebraska and Minnesota.