2.3 Information about the Trunk CardsInstallation Manual 792.3.7 BRI1 Card (KX-TDA3283)Function1-port ISDN Basic Rate Interface card. EURO-ISDN/ETSI compliant.Accessories and User-supplied ItemsAccessories (included): Extension Bolt × 1, Strap × 1, Optional Card Label × 1User-supplied (not included): RJ45 connectorNotes• When connecting this optional service card to the trunk, connect through an NT1; do not connectto the U interface of the trunk directly.• This optional service card has 100 Ω of terminal resistance. For use in point to multi-pointconnection, the card must be placed at the end of the bus.• This optional service card can be used for either trunk or extension connection, by setting the A/Bswitch or using the connector with appropriate pin assignments.• To confirm the trunk connection, refer to "Confirming the Trunk Connection" in "2.12.1 Starting theHybrid IP-PBX".NoticeIf the connected ISDN terminal has no external power source, make sure that the power is suppliedfrom the BRI1 card by programming the Hybrid IP-PBX accordingly.However, if there is an external power source to the terminal, make sure that there is no power suppliedto the terminal from the BRI1 card. Failure to do so may cause damage to the power supply circuit ofthe BRI1 card or the terminal.Switch SettingsSwitch Type Usage and Status DefinitionA/B Slide Select A (default) for trunk or B for extension use.To NT1/ExtensionRJ45LED A B A BOR
