Abstract: A method of handling incoming calls directed to a virtual communication subscriber is disclosed. An incoming call intended for the virtual communication subscriber is received at a first communication device. A call is placed to a second communication device using contact information provided by the virtual communication subscriber. Extension information is provided to a guest PBX when the call is answered which corresponds to a communication line associated with the second communication device. Upon connection to the second communication device, the incoming call is bridged with the call placed to the second communication device.

Abstract: An infrared head set which is made as a chin bow receiver which is designed to pick up infrared signals and convert them into an audio transmission in the auditory range. This infrared head set includes a base housing (20a-c) and two bow ends (27) with one miniature speaker each located on the end side. The two bow ends (27) are supported in the base housing (20a-c) and can be elastically spread in at least one plane. The bow ends (27) are dynamically connected to at least one switch (5) housed in the lever action range of the plane. The switch turns on the receiving circuit for a certain spread position (12) of the bow ends (27) with the spread position (12) being dependent on wearing. Automatically turning reception on and off of the chin bow receiver dependent on wearing is advantageous.

Abstract: A system and method to protect a target telephone number from unauthorized access includes a first one-way encoding unit to encode the target telephone number using nonreversible encoding. A storage unit stores the encoded target telephone number. A second one-way encoding unit encodes a calling telephone number and a receiving telephone number using the non-reversible encoding. A comparing unit determines whether the stored encoded target telephone number matches the encoded calling telephone number and/or the receiving telephone number and routing a call between the calling telephone number and the receiving telephone number matching the target telephone number to a monitoring unit. The monitoring unit monitors and/or records the call and connects the calling telephone number to the receiving telephone number.