Installation Questions 55Local TelephoneServiceBefore you install the NBX system, be sure that the client site meets thefollowing local telephone service requirements:■ The client’s local telephone company has installed local telephone linesand assigned telephone numbers.■ If necessary, you have extended the wires from a centrally locatedtelephone interface panel to the installation site.■ Each analog telephone line has dial tone.CAUTION: 3Com strongly recommends that you use UL-listed surgesuppression devices on all local telephone lines.■ If you are installing an optional BRI-ST, T1, or E1 Digital Line Card,verify that the client’s telephone company has installed BRI-ST, T1, orE1 lines and run them to the installation location.InstallationQuestionsIf you have not already planned the installation, the following topicsdiscuss issues that you may encounter when you install the telephonesystem.Who Should Installthe NBX System?A technician who understands Ethernet 10BASE-T and 100BASE-Tcabling requirements and telephony configuration should install andconfigure the system. If you are using the IP capabilities of the NBXsystem, the technician also needs to understand IP, subnetworks, andDHCP (Dynamic Host Configuration Protocol).After the initial installation, the local administrator should be able toinstall additional telephones and manage the system.If the cabling scheme has not been designed and installed, you shouldconsult a qualified network design engineer. Although it is not difficult toset up a small 10BASE-T or 100BASE-T LAN, a well-designed networkshould accommodate future growth without redesign. The NBX systemdocumentation does not explain the workings of Ethernet or IP, or therequirements for cabling a network.
