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MGCP

  • This topic has 0 replies, 1 voice, and was last updated 20 years ago by TranKimPhong.
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    TranKimPhong
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    Our Cisco IP Telephony system with Cisco CallManger 3.2 and Cisco Router 3660 have the delayed for ringback tone about 15 sec when calling from PSTN to IP Phone.

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