ISDN Line Parameter Tables A-5AT&T 5ESS Switch NI1To order ISDN service for the AT&T® 5ESS switch, supply thetelephone company with the information provided inTable A-2.Table A-2 Line Configuration for AT&T 5ESS NI1Required Information SpecificationLine Type Standard (2B+D) National ISDN-1 lineLine Code 2B1QInterface Type U interfaceDirectory Numbers 2*Maximum Terminals 1Maximum B Channels 2*Actual User YesCircuit-Switched Voice 2*Circuit-Switched Voice Channel AnyCircuit-Switched Data 2Circuit-Switched Data Channel AnyTerminal Type A (Basic Terminal)Display YesCircuit-Switched Voice Limit 2*Circuit-Switched Data Limit 2Voice or Data BothCall Appearance Preference IdleFlexible Call Offering (FCO) Yes†Additional Call Offering (ACO) Yes‡Caller ID Yes**Call Forwarding Variable Yes††* The Directory Number, Circuit-Switched Voice, Maximum B Channels, and Circuit-Switched VoiceLimit parameters should be set to 2 to allow both analog ports to be used simultaneously. If thoseparameters are set to 1, the ISDN line can only place or receive one call at a time.† Flexible Calling (FCO) provides 3-Way Calling (Call Conference), Hold, Drop, and Transfer fromanalog equipment attached to the modem.‡ Additional Call Offering (ACO) allows you to use incoming Dynamic Bandwidth Allocation (DBA) aswell as Call Waiting.**Caller ID is necessary to employ the Call Logging feature. If you would like to have Call Logging,you must order Caller ID. However, Caller ID itself, which requires an external device to monitorincoming calls, is not supported.††Call Forwarding allows you to forward calls to another telephone number.
