100 CHAPTER 2: INSTALLING SYSTEM HARDWARE COMPONENTSConnectingTelephone LinesAfter you have installed and configured the system for initial startup,connect the telephone company lines to the line card ports so that youcan start receiving outside calls.Adding ExternalHardwareExternal devices connect to the front of the Call Processor. See “WhatExternal Devices Can Connect to an NBX System?” on page 57.Connecting aMusic-on-Hold (MOH)Input DeviceUse a patch cord with phono-type connectors (stereo or mono) toconnect line level audio from any audio device that has a line-out jack tothe MOH jack on the front of the Call Processor.Adjusting Music-on-Hold (MOH) VolumeTo adjust the volume of music on hold (MOH):1 Use a nonferrous (plastic or aluminum) adjustment tool to adjust thevolume control on the front of the Call Processor to about mid-range.2 Use a 3Com Telephone to call another extension, and have the personput you on hold.3 While listening to the music, adjust the volume control on themusic-on-hold input device.Connecting a PagingAmplifierConnect the paging device to the paging connector on the front of theCall Processor. See the documentation for your paging amplifier forinformation about that device. For information about how to page from atelephone on the NBX system, see “Paging” in the “Getting More FromYour Telephone System” chapter in the NBX Telephone Guide.The paging connector on the Call Processor is an RJ-11 connector. It is aline-out, 600 ohm audio interface with a dry contact closure for use withan external paging amplifier (Table 17).Table 17 Paging Amplifier ConnectorPin 1 Not connectedPin 2 Relay commonPin 3 RingPin 4 TipPin 5 Relay contactPin 6 Not connected
