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Reply To: Uplink/Downlink Frequencies in GSM/CDMA

#37017
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.