[Serusers] Re [cisco-voip] No early media for ISDN->SIP->ISDN

karl ser_newbie at yahoo.com
Fri Apr 8 12:52:06 CEST 2005


Hello all,
 
I have just come across the below email by Andreas Graning re the above subject, and its just exactly the same problem I am currently faced with. In this respect, I was wondering if anyone has in the meantime come across a solution to the issue. 
 
Any help on this subject shall be greatly appreciated.
 
 
Thankssssssssssss.
 
 
Regards,
 
 
Karl 
[cisco-voip] No early media for ISDN->SIP->ISDNAndreas Granig SIP->ISDN" href="mailto:cisco-voip%40puck.nether.net?Subject=%5Bcisco-voip%5D%20No%20early%20media%20for%20ISDN-%3ESIP-%3EISDN&In-Reply-To=">a.granig at inode.at 
Wed May 12 09:52:19 EDT 2004 

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Hi,I've a Cisco 5300 running firmware image c5300-js-mz.122-15.T12.bin that interacts with SipExpressRouter (SER) from iptel.org.Following scenario: a caller from ISDN calls a number which is routed thru the C5300 to SER, where it is forwarded back to ISDN via the C5300 again. In this, and only in this scenario, the caller doesn't hear any early media (no ringback, no announcements etc).It works like charm when I for example call from a Cisco ATA to ISDN via C5300 and vice versa.When I configure "voice call send-alert" at the C5300, the PROGRESS is converted to ALERT and I hear a ringback tone, but other early media like announcements are also overwritten by a ringback tone.I've also tried "progress_ind setup enable 3", 8 for alert and 8 for proceed, without any success.I've alread studied (hopefully) all available Cisco documentation (voice commands for Firmware 12.2-T, the "Interworking Signaling Enhancements for H.323 and SIP VoIP", the "PSTN Callers not Hearing any Ring Back When
 they Call IP Phones", "Troubleshooting No Ringback Tone on ISDN-VoIP (H.323) Calls" and so on).Any hints?Regards,AndyPS: I've attached the Q931-debug and here are also the relevant parts of the C5300 configuration:voice call send-alert!voice-port 0:D  input gain 2  echo-cancel coverage 32  echo-cancel suppressor  timeouts interdigit 3!dial-peer voice 9 pots  application session  destination-pattern 0.  no digit-strip  direct-inward-dial  port 0:D!dial-peer voice 99 voip  destination-pattern [1-9]...T  translate-outgoing calling 5  translate-outgoing called 1  voice-class codec 1  session protocol sipv2  session target dns:my.sipserver.com  dtmf-relay h245-signal  no call fallback  no vad!gateway  timer receive-rtcp 5!sip-ua  retry invite 2  retry response 2  retry bye 2  retry cancel 2-------------- next part --------------A non-text attachment was scrubbed...Name: isndlog_sig.txtType: plain/textSize: 4876 bytesDesc: not availableUrl :
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