3Com 3C10200 NBX Installation Guide - Page 157

8 T1 DIGITAL LINE CARD This chapter tells you how to install a T1 Digital Line Card. In the NBX NetSet utility, digital line cards are referred to as either cards or boards. The following sections describe how to add a T1 Digital Line Card (3C10116C and 3C10116D) and how to connect to a T1 service provided by the local telephone company: ■ Adding a T1 Digital Line Card ■ Verifying the T1 Digital Line Card Installation Notes ■ See "NBX Licensing" on page 56 for information on the number of T1 cards supported by an NBX Network Call Processor. ■ You can choose to configure a T1 Digital Line Card to use one of two types of signaling: ■ DS1 protocol (sometimes called Standard T1). By default, the Auto Discover process selects DS1 as the signaling type. ■ ISDN PRI (Primary Rate Interface) signaling. ■ The 3C10116D T1 Digital Line Card can be installed at a remote location and communicate with its NCP over a routed network. For more information, see the NBX Administrator's Guide. ■ Before you install any T1 Digital Line Cards, you may want to configure the Outdialing Prefix settings. For more information, see the Dial Plan chapter of the NBX Administrator's Guide. ■ 3C10116D T1 Digital Line Cards do not support DHCP lease times of less than 20 minutes. ■ The NBX system provides E911 (emergency) connectivity if the T1 Digital Line Card is configured for ISDN PRI (Primary Rate Interface) signaling. The system provides the calling number (ANI) so that the emergency services personnel can determine the location of the caller from the E911 database. You must update the CO (PSAP) databases.