48 CHAPTER 1: INTRODUCTIONWhat Does NOT Count Toward the Total Device Limit?The NBX systems do not count most applications toward the total devicelimit, although some may be governed by license limits. Examples: voicemail ports, automated attendant ports, Call Park zones, System SpeedDials, and any other item with “None” in the second column in Table 5on page 49.Individual DeviceLimitsCertain individual device types are limited to a maximum per systembecause of internal product rules. For example, the NBX Analog Line Cardhas 4 ports. Although each of these ports counts as a device, the NBXSuperStack 3 system architecture limits the system to 180 cards, and thus720 (not 1500) ports.Individual device limits are listed in Table 5 on page 49.Licensed DeviceLimitsCertain individual devices and applications have count limits that aregoverned by licenses. (See the 3Com Price List or your 3Com NBXVoice-Authorized Partner for details on available incremental licences.)Example: You can install a license for 2 Virtual Tie Lines (VTLs), and thenadd incremental 2-unit licenses up to a limit of 8 VTLs on an NBX 100system or up to 48 VTLs on a SuperStack 3 NBX system.How the Three LimitTypes InteractAs you add devices to an NBX system, you must keep in mind all three ofthese limitations:■ Total device limit for the system■ Individual device limit for certain device types■ License limit for certain device typesExample: Your SuperStack 3 NBX system has a license for 750 totaldevices and you want to configure 450 telephones:■ You configure 6 NBX Analog Line Cards, and 12 NBX Analog TerminalCards (for analog telephones and FAX machines).The total device count is now (6 x 4) + (12 x 4) = 72.■ You then configure 450 3Com Telephones.The total device count is now 522. You can configure 228 additionaldevices (750–522).
