Generic Access Network
The communication standard Unlicensed Mobile Access (UMA ) allows GSM, GPRS/EDGE- and UMTS / HSDPA services via Bluetooth or Wi-Fi services in the unlicensed ISM frequency band to realize.
Unlicensed ( unlicensed ) in this context means that neither Customer nor mobile network operators have to pay licenses for the operation, in contrast to the classic mobile, in which the network operator must have licenses for the GSM or UMTS frequencies. UMA is not a simple VoIP over Wi-Fi or Bluetooth connection (VoWLAN ), but the standard also allows handover and roaming, so the assumption of ongoing discussions.
Especially in the U.S., France, Canada and England the service is a great success. An offer of Deutsche Telekom, which is also connected telephony over wireless and mobile, but not up to the UMA standard and no features such as handover or EAP- Sim supported and also with only a single, produced exclusively for T -Com and relatively error-prone Handset was to use was discontinued shortly after its launch in 2006. Another great advantage of UMA standards, however, is the broad support by various equipment manufacturers, such as LG, RIM / Blackberry, Nokia, Samsung, Motorola, HTC or Sony Ericsson. Apparently, the German Telekom currently (as of June 2010) working on a launch of UMA in Germany.