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NECI bit and fail call establishement

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  • #61120
    benrebeh
    Guest

    Hello Pix ,

    witn SWISSQUAL , we hanve encountered several fail in call establishment and the message indicated by the tool in RR layer is :

    Channel Request
    Establishment cause: Originating call and TCH/F is needed, or originating call and the network does not set NECI bit to 1, or procedures that can be completed with a SDCCH and the network does not set NECI bit to 1
    Random reference: 16
    Can you help me to undersatand this message and the relation with NECI field(bit)???

    #61121
    krishnaneel
    Guest

    Hi,

    NECI when set to 1, it informs Mobile that the area supports Half-rate TCH, when it is set to 0, It indicates half-rate TCH is not supported by the system.

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