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Uplink/Downlink Frequencies in GSM/CDMA

Viewing 15 posts - 46 through 60 (of 63 total)
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  • #37015 Reply
    Umar Khan
    Guest

    hy fellows can any U please find answer of my simple question…?

    Q—> Whats is the data rate of Um Air Interfacein of GSM…?

    Q—> Which specific protocols used in NGN architecture..?

    Many Thankx..!

    #37016 Reply
    Pix
    Guest

    Q1 –> one timeslot on the air interface for GSM carries up to 22.8 kbps of ‘raw’ data in GSMK modulation (voice or GPRS), and up to 55kbps in 8PSK modulation (EDGE).

    one user can get up to n timeslots when transferring data (GPRS / EDGE), depending on the class of the mobile. It is usually 4 timeslots… so the data rate can reach 220kbps in excellent condition. In urban environment, one user can usually expect 180kbps (outside busy hours).

    Q2 –> i don’t know about NSS, sorry…

    #37017 Reply
    Umar Khan
    Guest

    the main prorool used in NGN are
    1. The SIP or H323 protocolfor signaling between two Softswitch.
    2. The MGCP or H248 to control MGW.
    3.The Sigtran in order to carry the SS7 message over the IP network.

    #37018 Reply
    Umar Khan
    Guest

    Thx alot Pix….! 🙂

    #37019 Reply
    awii
    Guest

    hi everyone,can any one tell me why a site gets intermittent every now and then…even the technicans from erricssion cannot solve this issue and its exactly one month.
    please assist with some hints

    #37020 Reply
    Anoop
    Guest

    What is the frequency used in CDMA

    #37021 Reply
    srikanth ponnam
    Guest

    cdma
    uplink 824-849mhz
    downlink869-894mhz
    carrier frq 1.25mhz

    #37022 Reply
    devendra
    Guest

    what is downlink frequency of 1900 mhz.

    #37023 Reply
    KALYAN KRISHNA AWASTHI
    Guest

    WHY IS THE UPLINK FREQUENCY LOWER THAN THE DOWNLINK FREQUENCY IN CDMA?
    IS THERE ANY OTHER REASON EXCEPT THE POWER TRANSMITTING CAPABILITIES OF MOBILE SET AND THE BASE STATION?
    PLEASE CLEARIFY

    #37024 Reply
    KALYAN KRISHNA AWASTHI
    Guest

    what are the major drawbacks associated with the 6/4 GHz band used for up-link /down-link transmission in a satellite communication link?

    #37025 Reply
    karthika
    Guest

    wat is the exact uplink and downlink frequency

    #37026 Reply
    AVANISH MISHRA
    Guest

    for GSM-1900
    downlink freq=1710-1785MHz
    uplink freq=1805-1880MHz

    #37027 Reply
    manoj
    Guest

    hi friends,
    why downlink frequency is greater than uplink frequency in GSM bands?

    #37028 Reply
    Anshu
    Guest

    since lower frequency transmitted by the handset ,it can go to higher distance with low power. low power is important bcoz’ it’s battery power equipment.

    #37029 Reply
    kumar
    Guest

    need a uplink & downlink frequency

Viewing 15 posts - 46 through 60 (of 63 total)
Reply To: Uplink/Downlink Frequencies in GSM/CDMA
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