166 CHAPTER 9: 3C OM LEGACY LINK CARDS■ You must install a license on your NBX system before the system willrecognize Legacy Link Cards. See “NBX Licensing” on page 59 forinformation on the number of Legacy Link cards supported by an NBXsystem.■ The maximum loop length is 1000ft (300m).■ The supported Norstar handsets are the M7000 Series and T-Seriesmodels: M7100, M7208, M7310, M7208N, M7310N, M7324, T7100,T7208, T7316, T7406 (digital cordless).■ When connected to the card, the Norstar handset reflects the featuresand functionality of the NBX Business Telephone. For details of specificphone model features and capabilities, see the Legacy Link for NorstarHandset Compatibility and Overview.■ The Norstar phones are line-powered from the card through anexternal power source. No additional phone power is required.■ The 3Com Legacy Link cards do not support compression. Voice trafficbetween a legacy handset and an NBX device that supportscompression will be uncompressed.■ Handsets connected to the card can be configured through the ButtonMappings page of the NBX NetSet utility. You can configure eachphone individually, but 3Com recommends that you use theTelephone Groups option within the NBX NetSet utility to define agroup with specific button mappings for each telephone type, whichcan then be re-used for any number of phones.■ The Norstar Handset Overview document is available from the 3Comweb site. It compares the differences in operation of the Norstarhandsets, including button mapping and default layouts.■ Quick reference cards are supplied with the 3Com Legacy Link forNorstar card. You should replace the existing Norstar Quick ReferenceCards (situated under the handset on the Norstar phone) with thenew 3Com Quick Reference Cards provided.■ Templates for Norstar Key Cap Labels and Norstar Phone QuickReference Cards can be obtained at www.desi.com.Adding a LegacyLink Card to an NBXSystemWhen you unpack your Legacy Link Card, be sure you receive, in additionto the card, an external power supply. You connect the power supply tothe front of the Legacy Link Card after you install it into an NBX chassis so
