Wednesday, August 19, 2009

GSM PSTN


Ericsson's solution for GSM connection to a company's Intranet or to the Internet, includes the use of the PSTN between the GSM network and the access-server on the Intranet, or the access-server at the Internet Service Provider. Due to modem handshaking, the time for connection is very long, up to 40 seconds. The unit converting the GSM digital signals to PSTN analogue signals is called the GSM Interworking Unit (GIWU). It can be integrated in the MSC, and is then called DTI, Digital Transmission Internetworking Unit. On the established circuit-switched connection PPP (Point-to-Point protocol) is used. The IP traffic is carried by PPP. The long time for establishing this connection is a great disadvantage for
both users and network operators alike.


High Speed Circuit Switched Data (HSCSD), which uses more time slots, is available to circuit switched GSM. The standard is ready and Ericsson are shipping products. The standard allows for speeds of up to 64 kbps and is intended to be used by, for example, video conferencing and telemedicine applications.

No comments:

Post a Comment

Hi thank you for comment in Assignment Lanka " Book Mark on me' To future references.

Tag

Assignment Lanka Tag Cloud
Computer Networks The History of Local Area Networks, LAN, The Topologies of a Networks, LANs describe different types of transmission Medias, Local Area Networks Access Methods, Carrier Sense Multiple Access with Collision Detect, Development of LAN Technologies. LAN -Token Ring, LAN Ethernet Digital, LAN - Ethernet Sun microsystems, LAN - Ethernet Mixed Environment, LAN - Token Ring was introduced by IBM LAN - IBM implementation of Token Ring, Token Ring Novell, LAN Token Ring - in a mixed environment, LAN - Fiber Distributed Data Interface, LAN - ATM, LAN Components, LAN Switching Methods, Virtual Local Area Network, Port based VLAN, Mac based VLAN, Protocol based VLAN, User Base VLAN, PC networks Components, PC networks Shared resources, PC Network operating systems, PC networks Novell Netware, PC networks Windows NT, PC networks IBM LAN Server Computer Programming Languages HTML Language, The Generations of Programming Languages, Different types of High Level Languages, Different types of High Level Languages Disadvantages
Computer Networks - IBM LAN Server, Windows NT Networks, Novell Netware, Network operating systems, Networks Shared, Networks Components, User Base, Protocol based, Mac based, Port based, VLAN, LAN Switching, LAN Components, ATM, Fiber Data, Token Ring, Token Ring Novell, IBM implementation, Ethernet, Sun microsystems, Ethernet Digital, Token passing, LAN Technologies, CSMA/CD, Access Methods, Transmission, Networks, The History of Local Area Networks, LAN