<div dir="ltr">On Sun, Mar 24, 2013 at 9:43 AM, <a href="mailto:xiaofengcanyuexp@163.com">xiaofengcanyuexp@163.com</a> <span dir="ltr"><<a href="mailto:xiaofengcanyuexp@163.com" target="_blank">xiaofengcanyuexp@163.com</a>></span> wrote:<br>
<div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><br>
Dear freeswitch support<br>
<br>
I have been studying freeswitch for a few weeks. I will be planning to take the freeswitch as a signal gateway connecting PSTN(ISUP) and SIP.<br>
It needs convert the ISUP to SIP based on RFC3372/RFC3204/RFC3398 and vice versa.<br>
I notice in the mime_type.cfg supporting applicaiton/ISUP, but I don't find any code in sofia(SIP) module to decode/encode the application/ISUP.<br>
My question is: Does freeswitch support to do the signalling gateway connecting ISUP(freeTDM module also has the MTP layer support) and SIP(SIP-T/SIP-I)? If yes, could you let me know how it works?<br>
<br>
</blockquote><div><br></div><div>Hello Windy,</div><div><br></div><div>There is no support in FreeSWITCH for SIP-I or SIP-T</div><div><br></div><div>ISUP to SIP conversion is supported using Sangoma's SS7 module based on Trillium SS7 stack. Note this is licensed, not open source (this is true for all the MTP layers and ISUP, SCCP etc).</div>
<div><br></div><div style>Sangoma uses a raw/proprietary mechanism to pass-thru complete IAM messages in a SIP network, it is a crude embedding of the IAM message encoded using base64, within SIP header. We are aware this is crude and by far does not cover all cases, but it was done as quick and dirty way to avoid implementing the whole SIP-I/SIP-T spec and at the same time not miss any IAM information. </div>
<div style><br></div><div style>In all honesty we've had not seen many requests for it so that has kept us from doing the implementation work.</div><div style><br></div><div style>Cheers,</div><div><br clear="all"><div>
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