6 ipRocketLink 3088FR Quick Start GuideNote The NTU’s V.35 interface is wired as a DCE. No DTE configuration is possible. If you are directly connect-ing the NTU’s V.35 interface to third-party equipment that cannot be configured as a DTE, you must usea tail-circuit cable. You can purchase a tail-circuit cable from a datacom-supply vendor. A tail-circuitcable will cross-over the necessary V.35 signals so that the two DCE interfaces can communicate.Note The NTU’s X.21 interface is default configured as a DCE. Changing the DTE/DCE strap internally can setthe configuration for DTE. The NTU’s X.21 interface requires a cable with a male DB-15 connector.7.0 Additional InformationRefer to theipRocketLink 3086FR Getting Started Guide & 3088FR Getting Started Guide located on the CD-ROMshipped with your 3088FR NTU and available online at www.patton.com/manuals for detailed informationabout:• Installing, configuring, operating, and troubleshooting,• Warranty, trademark, & complianceA.0 Customer and Technical SupportToll-Free VoIP support: call sip:support@patton.com with a VoIP SIP phoneOnline support: www.patton.comE-mail support: support@patton.com—answered within 1 business dayTelephone support:• Standard: +1 (301) 975-1007 (USA), Monday–Friday: 8:00 am to 5:00 pm EST (1300 to2200 UTC/GMT)• Alternate: +41 (0)31 985 25 55 (Switzerland), Monday–Friday: 8:00 am to 5:00 pm CET (0900 to 1800UTC/GMT)Fax: +1 (253) 663-5693 (USA) or +41 (0)31 985 25 26 (Switzerland)