Glossary / 641N0130943 02 Modular ICS 7.1 Installer GuideBB channel (Bearer channel). AnISDN standard transmission channelused for voice or data transmission.Base station: A hardware componentthat is mounted on walls and ceilings toprovide a radio link to an office or otherarea where portable telephones are used.Each base station houses two radios thatallow portables to send and receive callsthrough the ICS.Background Music: A feature thatallows you to hear music from thespeaker of your Norstar telephone. It isavailable only if a music source hasbeen attached to the ICS and the featurehas been enabled under Featuresettings in Sys prgrmmng.Basic password: A one- to six-digitpassword that prevents unauthorizedaccess to the most commonly-usedtelephone settings. The Basic passwordcan be assigned and changed inPasswords programming.Basic Rate Interface (BRI): AnISDN interface which uses twoB channels and a D channel (2B+D).Bearer channel: See B channel.Business series terminals Theseterminals were developed to replace theNorstar M-series terminals. Therefore,their functionality closely parallels theM-series terminals.button caps: Interchangeable plasticcaps that fit over the buttons of legacyNorstar M-series telephones. They areused to indicate the featuresprogrammed onto each programmablememory button. Button caps are eitherpre-printed or have clear windows thatallow you to insert labels.Button Inquiry: ≤•‚With this feature you can check thefunction of each programmable buttonon your system telephone.CCall Duration timer: ≤‡‡A feature that allows you to see howlong you spent on your last call, or howlong you have been on your present call.Call Forward: ≤›A feature that forwards all the callsarriving at your telephone to anothertelephone in your Norstar system. Tohave calls forwarded outside the system,use Line Redirection.Call Forward No Answer: A featurethat forwards all calls arriving at yourtelephone to another designatedtelephone in your Norstar system after aspecific number of rings. Call ForwardNo Answer is assigned underCapabilities in Terminals&Setsprogramming.Call Forward On Busy: A featurethat forwards all calls at your telephoneto another designated telephone if yourtelephone is busy. This feature isassigned under Capabilities inTerminals&Sets programming.Call Forward Override: Anautomatic system feature that allowsyou to call someone and ask them tostop forwarding their calls to you.Call Information: ≤°⁄⁄Call Information allows you to displayinformation about incoming calls. Forexternal calls, you can display the callername, telephone number and the linename. For an internal call, you candisplay the name of the caller and theinternal number. You can obtaininformation about ringing, answered, orheld calls.