Programming the In-Band DTMF ProtocolChapter 8: Programming theIn-Band DTMFProtocol8.1. GeneralThis chapter describes how to program the unit to detect In-Band DTMF codessent by your PBX and to take appropriate action upon detection.When the In-Band DTMF Protocol feature is programmed, the unit waits adefined period of time for an In-Band DTMF code after answering a call from thePBX. If the unit detects the code within the defined period of time, it performs apredefined operation. If the unit does not detect the code, it plays the AutomatedAttendant’s Opening Greeting.After answering a call from your PBX, the unit plays the Automated Attendant’sOpening Greeting under the following conditions:z The DTMF codes received from the PBX do not exactly match theprogrammed In-Band DTMF codes.z The specified extension number (Target) called does not have a validmailbox.z The first DTMF character of the In-Band DTMF code was received after thespecified period of time.z The following DTMF characters were received outside the specified timeframeIf an In-Band DTMF table is empty but incoming DTMF string includes anasterisk (*) sign, the system will disconnect immediately.You can program In-Band DTMF codes for up to ten events by:z Touch tone telephonez Computer running the Voice Mail Maintenance Software (VMS)8.2. Programming the Unit by TelephoneThe following sections present the command codes used to program the unit todetect and act on In-Band DTMF codes sent by your PBX.Voice Mail and Auto Attendant System Installation and Programming Manual 8-1