topic Re: Announcement plays too early over sip in IP Telephony and Phones

Announcement plays too early over sip

Louis-Philippe Descamps — Sun, 17 Mar 2019 19:09:22 GMT

we have a ANN that plays "Your call is being recorded" using ECC/CURRI

If called internally we hear the full message

If called externally we hear "is being recorded"

Any idea?

thanks

Re: Announcement plays too early over sip

R0g22 — Thu, 08 Feb 2018 13:31:32 GMT

Are you using a ITSP SIP Trunk with or without a CUBE/GW ? Try enabling PRACK on the SIP Profile.

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Thu, 08 Feb 2018 13:33:30 GMT

no cube. we are using voice provider over sip trunk.

PRACK is enabled as it has to be enabled in order to hear the ANN.

Re: Announcement plays too early over sip

R0g22 — Thu, 08 Feb 2018 13:35:57 GMT

Ok. Can you describe the complete call flow ? Call hits CUCM >> goes to ?? >> transfers ??

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Thu, 08 Feb 2018 13:40:07 GMT

externally

VoiceProvider->SIP Trunk CUCM->called DN (ECC profile)

Internally

calling DN -> called DN (ECC profile)

ECC profile goes to a CURRI server

Re: Announcement plays too early over sip

R0g22 — Thu, 08 Feb 2018 14:16:13 GMT

Ok. So in this case, your ITSP will be responsible for PRACKing not the CUCM. If there needs to be early media, ITSP will prack a 18X SIP message in order to cut through audio flowing towards them from CUCM. I believe that part is not working and the audio flows only after the final response i.e. a "200 OK" reason why there is audio clipping. Can you send a CCM SDL Trace for a test call please ? Or better a pcap from CUCM CLI using the following CLI -

utils network capture eth0 file packets count 100000 size all host ip X.X.X.X

X.X.X.X will be your ITSP IP or the SIP Trunk destination. Do a "ctrl+c" to stop the capture once done.
You can download it from RTMT >> Trace & Log Central >> Packet Capture Logs >> Select the node where you took the pcap from.

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Thu, 08 Feb 2018 17:45:59 GMT

see attached

Re: Announcement plays too early over sip

R0g22 — Thu, 08 Feb 2018 16:57:15 GMT

Who is 10.20.44.27 ?

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Thu, 08 Feb 2018 16:58:49 GMT

tftp

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Thu, 08 Feb 2018 17:47:13 GMT

tftp

Re: Announcement plays too early over sip

R0g22 — Thu, 08 Feb 2018 20:48:16 GMT

TFTP only ? or is it running IPVMS as well ?

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Fri, 09 Feb 2018 10:26:07 GMT

And IPVMS aswell
thanks

Re: Announcement plays too early over sip

R0g22 — Sat, 10 Feb 2018 13:07:55 GMT

Ok, so from the pcap CUCM sends a 183 w/SDP containing the IP address "10.20.44.27" and your ITSP pracks it, at that point there should be early media. Signalling looks fine. You can take a pcap from this node to check if RTP flow correctly or not for these calls every time and/or advise your ITSP to take a pcap at their end and send it across for analysis.

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Mon, 12 Feb 2018 10:15:08 GMT

Hi,

I setup our test sip trunk to use subscriber .23 and use ANN on .23.

the .149 is our signaling to ITSP and .13 is our rtp to ITSP.

Am I right saying that 24986 is the ANN message?

Should i go after prack?

thanks

Re: Announcement plays too early over sip

R0g22 — Mon, 12 Feb 2018 15:27:33 GMT

That's right. "24986" is the UDP RTP port being used.

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Mon, 12 Feb 2018 15:30:27 GMT

should it go between 200ok and 180 ringing?

Do I request that from my ITSP?

thanks

Re: Announcement plays too early over sip

R0g22 — Mon, 12 Feb 2018 15:34:10 GMT

In the SIP ladder that you posted, who is .149 and .132 ?

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Mon, 12 Feb 2018 15:35:45 GMT

the .149 is our signaling to ITSP and .132 is our rtp to ITSP.

Re: Announcement plays too early over sip

R0g22 — Mon, 12 Feb 2018 15:40:18 GMT

What device is .149 ? CUCM ? .23 is the subscriber right ? And .132 ? Is it a ITSP device or is it on your network ? Not sure why is a call being sent from .149 to .23

Re: Announcement plays too early over sip

Louis-Philippe Descamps — Mon, 12 Feb 2018 15:43:42 GMT

.149 is the ITSP and it's the sip trunk between ITSP and cucm
.23 is cucm sub
.132 is the ITSP