Thuraya services, like in any other GMPCS system, are intended for outdoor usage. However the Thuraya system will enable users who are indoors to receive an alerting signal. He or she can then move outdoors to start the call. The Thuraya user terminal is dual mode–GSM/Satellite Thuraya– and the user also has the option to use GSM while in a GSM network and indoors. Thuraya’s Fixed Docking Unit (FDU)- the Home/Office Docking product allows the usage of the Thuraya phone in an indoor environment such as home or office. The FDU will complement the Thuraya phone by extending its operations and functionalities inside buildings