<div dir="ltr">Hi,<div><br></div><div>I have been using Sangoma A102 card with wanpipe-3.5.28 and FS 1.2.8.</div><div><br></div><div>At a couple of different customer sites, common issue reported is, when a call is made from external world (mobile/fixed line), although the destination extension rings, no ringback is heard at the caller end.</div>
<div><br></div><div>Extension dialplan is to bridge to the desired extension, something like:</div><div> <action application="bridge" data="user/3001" /><br></div><div><br></div><div>On capturing the isdn traces, I see that packet exchanges involve SETUP, CALL PROCEEDING, and ALERTING (with a progress indicator saying "Call is not end-to-end ISDN - progress information available in-band")</div>
<div><br></div><div>After experimenting a bit, what I find is, ringback is heard if I were to modify my dialplan as follows:</div><div><action application="ring_ready" /><br><action application="set"
data="ringback=$${uk-ring}"/><br><action application="bridge"
data="user/3001" /><br></div><div><br></div><div>This time, ISDN traces have the following: SETUP, CALL PROCEEDING, ALERTING (with a progress indicator saying "Call is not end-to-end ISDN - progress information available in-band"), and PROGRESS (with a progress indicator saying "In-band information or an appropriate pattern is now available")</div>
<div><br></div><div>My question is, while working with FreeTDM, do I need to always set ringback explicitly? Could somebody please help me understand this correctly?</div><div><br></div><div>Thanks!</div></div>