MGCP This topic has 0 replies, 1 voice, and was last updated 18 years, 2 months ago by TranKimPhong. Viewing 1 post (of 1 total) Author Posts 7th February 2003 at 10:45 #23488 Reply TranKimPhongGuest 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. Author Posts Viewing 1 post (of 1 total) Reply To: MGCP Your information: Name (required): Mail (will not be published) (required): You may use these <abbr title="HyperText Markup Language">HTML</abbr> tags and attributes: <a href="" title="" rel="" target=""> <blockquote cite=""> <code> <pre class=""> <em> <strong> <del datetime="" cite=""> <ins datetime="" cite=""> <ul> <ol start=""> <li> <img src="" border="" alt="" height="" width=""> Submit