| UNIT 1: OVERVIEW - LESSON 2: GENERAL DESCRIPTION In addition to telephones and CO lines, other devices can also be connected to the Advanced Hybrid Wired/Wireless System. An optional Doorphone/Door Opener Card (KX-TAW84861) can be installed allowing up to four doorphones to be installed on the system. These doorphones (KX-T30865-W or KX-T30865-B) provide two-way communication to areas in which a telephone may not be desired or necessary. The KX-TAW84861 also provides four relay contacts that can activate customer provided door strikes or openers, allowing doors to be opened remotely from any extension that has permission to do so. The KX-TAW848 supports Central Office provided Caller ID and Call Waiting Caller ID (Visual Caller ID). Up to 2 optional Caller ID Cards (KX-TAW84893) can be installed. Each Caller ID Card supports 4 CO lines. When properly configured and programmed, the Caller ID information will appear on the proprietary display telephones, and can be printed as part of the Station Message Detail Report. When a KX-TAW84868 Extension Caller ID Card is installed, the Caller ID information can be sent to 8 single line devices as well. Remember that Caller ID is a Central Office feature offered by certain telephone companies for a fee. Another optional card that can be installed into the Main Unit is the KX-TAW84891 2-Channel Message Card. This card allows up to 32 messages to be recorded for DISA, Queuing and Timed Reminders. The DISA feature allows outside callers to hear a menu when they call into the system and connect with extensions without the assistance of an attendant or operator. DISA also allows users to access the system to make outgoing CO calls or to change their extension settings from outside the office. There are, of course, security options that would prevent unauthorized use of this feature. The KX-TAW84891 can store queuing messages that are heard by callers as they wait to be answered by a member of an Incoming Call Distribution (ICD) group. The KX-TAW848 allows up to 32 parties (including extension users and outside parties) to be engaged in different conference calls simultaneously. Each conference call can have a maximum of eight parties but conferences of six or more parties require a KX-TA84866 Echo Canceller card. The Echo Canceller Card suppresses the echo signal and adjusts the audio level to improve speech quality during multi-party conferences and CO-to-CO calls. Another convenient feature available is remote programming and diagnostics. This is accomplished by installing a KX-TAW84896 Remote Card into the Main Unit. Once installed, remote programming and diagnostics are performed using the KX-TAW848 Maintenance Console Software and a modem on an off-site computer.