EXCLUSIVE HOLDPressing HOLD twice will hold a call exclusively at a station so no other station can pick up that call. Intercomcalls are automatically placed on exclusive hold. Exclusive hold for trunk calls can be denied in class of serv-ice.GROUP LISTENINGThis feature allows users to turn on the speaker while using the handset. It allows a group of people to listento the distant party over the speaker without the microphone turned on.HEADSET OPERATIONEvery keyset can be programmed to allow the use of a headset. In the headset mode, the hookswitch is dis-abled and the ANS/RLS key is used to answer and release calls. Keyset users may turn headset operationON/OFF by keyset programming or more easily by pressing the headset ON/OFF key. The headset key lightssteady red when the keyset is in headset mode.HEARING AID COMPATIBLEAll OfficeServ 500 keysets are hearing aid compatible as required by Part 68 of the FCC requirements.LINE QUEUING WITH CALLBACKWhen the desired outside line is busy, the user can press the CALLBACK key or dial the access code to placehis/her station in a queue.The user will be called back when the line is available (a maximum of 100 callbacksare allowed system-wide at one time including busy station and busy trunk).LINE SKIPPINGWhen the user is talking on an outside line and the automatic hold feature is turned off, he/she may press anidle line key and skip to that line without causing the previous call to go on hold.LOUD RINGING INTERFACEThe MISC daughter board provides an audible ring tone output.This can be connected to a paging system orsingle loud speaker to provide loud ring tone for a specific station only. The tone is preset and can not bechanged.MANUAL SIGNALLINGKeysets can signal each other via a programmable key.This allows one station to alert another without estab-lishing a voice conversation. Each press of the key results in a 500 milliseconds of ring tone being set to theintended station. An individual manual signaling key must be programmed for each station to be signaled.MESSAGE WAITING LIGHT/INDICATIONWhen calling a station and receiving a busy signal or the no answer condition, the caller can leave an indica-tion that a message is waiting.The message button will flash red at the messaged keyset. A single line phoneconnected to a 16MWSLI or 8MWSLI will have a message light otherwise it will receive a distinctive messagewaiting dial tone. Five message waiting indications can be left at any station.MUTE MICROPHONE/HANDSETAny keyset user can mute the keyset’s handset transmitter by pressing the MUTE key. In addition, keyset userscan also mute the keyset microphone while the keyset is in speakerphone mode.4.33