Aastra 673xi / 675xi SIP Telephones4Aastra 673xi / 675xi Key DescriptionThe following tables explain the existing keys for all Aastra 673xi / 675xi models.Aastra 6730i and Aastra 6731iKeys Key Description and FunctionHold key: puts the current call on hold. Press this keyonce again to retrieve the call on hold.Redial key: redials previously dialled numbers.Goodbye key: ends an active call or exits an openmenu page without saving any changes made.Mute key: turns the microphone on or off.Volume control keys: adjusts the volume for thehandset, ringer and speaker.Options key: accesses the Options List menu card(please refer to The Options Menu starting onpage 30).Callers List key: this key is not used on theOpenCom 100 / Aastra 800 communications system(please refer to Caller Lists starting on page 17 also).Conference key: establishes a conferenceTransfer key: transfers the current call to anothersubscriberTrunk keys: connect you to a specific line or accept acall which is signalled on the line.Handsfree key: activates the Handsfree for makingand receiving calls without picking up the handset.