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New Member

Ringback Problem

hi, interesting problem here:

sometimes when dialing out from an ip phone I don't hear a ringback from the called number - sometimes I do. This has no pattern as to numbers etc, it just happened intermittently.

I am on a 2821 ios 12.4 spservices. h323 with local break out over PRI isdn.

my dial peer config for pots is:

dial-peer voice 1 pots

tone ringback alert-no-PI

description *** Outgoing calls to PSTN ***

destination-pattern 9T

progress_ind setup enable 3

progress_ind alert enable 8

progress_ind progress enable 8

progress_ind connect enable 8

translate-outgoing calling 2000

incoming called-number .

direct-inward-dial

port 0/0/0:15

any help is resolving this would be appreciated.

Thanks

Rod

14 REPLIES
New Member

Re: Ringback Problem

Generally, the progress_ind alert enable 8 will resolve. Try issuing voice call send-alert in config mode. This may be also be a firmware issue.

Anonymous
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Re: Ringback Problem

Anonymous
N/A

Re: Ringback Problem

New Member

Re: Ringback Problem

Hi, thanks for your reply. I already have that command in place. Re the firmware - do you think its the E1 card firmware or something else..?

My new site is sitting of the back of a 100Mb LES circuit, the building is connecter the the WAN point of entry via a 100Mb PAV link (half duplex connection) the WAN link is a 2Mbps MPLS connection to our central site where the UCM publisher is located - I am starting to think that it might be lost h225 signal packets due to the PAV link running at half duplex.

I activated SRST on the H323 gateway and did not have the problems!!!

Re: Ringback Problem

Hi Rod,

Try this on the pots dial peer:

progress_ind alert strip 8

hth,

nick

New Member

Re: Ringback Problem

hi nick,

I tried your command this morning and it stil didn't work.

We are re-locating out WAN link to the building where the LES 100Mb circuit terminates - rulling out the PAV and Duplex issue - I'm hopping this will solve my issue - will post later today if it has.

any other ideal would be welcome.

Thanks..

Rod

New Member

Re: Ringback Problem

Hi Nick, I have found the following issue from my debug isdn q931 command:

Rining

*Jan 23 12:18:10.431: ISDN Se0/0/0:15 Q931: Applying typeplan for sw-type 0x12 is 0x0 0x0, Calling num 8823

*Jan 23 12:18:10.435: ISDN Se0/0/0:15 Q931: Applying typeplan for sw-type 0x12 is 0x0 0x0, Called num 07949997718

*Jan 23 12:18:10.435: ISDN Se0/0/0:15 Q931: TX -> SETUP pd = 8 callref = 0x008F

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA98382

Exclusive, Channel 2

Progress Ind i = 0x8183 - Origination address is non-ISDN

Calling Party Number i = 0x0081, '8823'

Plan:Unknown, Type:Unknown

Called Party Number i = 0x80, '07949997718'

Plan:Unknown, Type:Unknown

*Jan 23 12:18:10.639: ISDN Se0/0/0:15 Q931: RX <- CALL_PROC pd = 8 callref = 0x808F

Channel ID i = 0xA98382

Exclusive, Channel 2

*Jan 23 12:18:16.279: ISDN Se0/0/0:15 Q931: RX <- ALERTING pd = 8 callref = 0x808F

*Jan 23 12:18:23.859: ISDN Se0/0/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x008F

Cause i = 0x8090 - Normal call clearing

*Jan 23 12:18:24.039: ISDN Se0/0/0:15 Q931: RX <- RELEASE pd = 8 callref = 0x808F

*Jan 23 12:18:24.039: ISDN Se0/0/0:15 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x008F

Not Ringing

*Jan 23 12:19:33.107: ISDN Se0/0/0:15 Q931: Applying typeplan for sw-type 0x12 is 0x0 0x0, Calling num 8823

*Jan 23 12:19:33.107: ISDN Se0/0/0:15 Q931: Applying typeplan for sw-type 0x12 is 0x0 0x0, Called num 07949997718

*Jan 23 12:19:33.107: ISDN Se0/0/0:15 Q931: TX -> SETUP pd = 8 callref = 0x0092

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA98382

Exclusive, Channel 2

Calling Party Number i = 0x0081, '8823'

Plan:Unknown, Type:Unknown

Called Party Number i = 0x80, '07949997718'

Plan:Unknown, Type:Unknown

*Jan 23 12:19:33.287: ISDN Se0/0/0:15 Q931: RX <- CALL_PROC pd = 8 callref = 0x8092

Channel ID i = 0xA98382

Exclusive, Channel 2

*Jan 23 12:19:38.723: ISDN Se0/0/0:15 Q931: RX <- ALERTING pd = 8 callref = 0x8092

*Jan 23 12:19:47.331: ISDN Se0/0/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x0092

Cause i = 0x8090 - Normal call clearing

*Jan 23 12:19:47.519: ISDN Se0/0/0:15 Q931: RX <- RELEASE pd = 8 callref = 0x8092

*Jan 23 12:19:47.523: ISDN Se0/0/0:15 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x0092

it looks like the Progress Ind i = 0x8183 - Origination address is non-ISDN line is missing from the debug of the phone that didn't have ringback???

any ideas?

Re: Ringback Problem

That's odd - you're sending ringback in the setup.

What's the full call flow, including protocols and versions of software?

hth,

nick

New Member

Re: Ringback Problem

Hi Nick,

We are using spservicesk9-mz.124-9.t7.bin, the phones are using skinny and the voip gateway is h323.

Call flow is

IP PHONE>LES>PAV>MPLS>UCM

All PSTN numbers break out at local gateway

I heard there was a bug in 12.4 with outgoing PSTN problems, I trying downloading 12.3 SPS and it doesn't have the commands for enabling the E1 card ?...

Thanks

Rod

New Member

Re: Ringback Problem

Hi Nick,

We moved our WAN connection and it hasn't stopped the problem. ringback is still failing sometimes.

Re: Ringback Problem

I have no idea why you're sending in-band information in a SETUP. It doesn't really make sense.

I would have to read through CUCM traces and dig deeper to figure out why you're doing something like that.

-nick

Re: Ringback Problem

Any ideas on this onoe ever Rob?

I have the same issue on

H.323 -> gatekeeper -> CVP -> gatekeeper -> CCM - > outbound H323 PSTN.

Same thing no ringback and see that progress is being sent in band.. originating is not ISDN.

Anyways ideas would rock

Chad

New Member

Re: Ringback Problem

Hi Chad,

I changed the configuration on my pots dial-peer and it fixed my problem.

New config:

dial-peer voice 1 pots

tone ringback alert-no-PI

description *** Outgoing calls to PSTN ***

destination-pattern 9T

progress_ind setup enable 3

progress_ind progress enable 8

progress_ind connect enable 8

port 0/0/0:15

good luck

rod

New Member

Re: Ringback Problem

Had a similiar issue - no ringback tones on certain calls (no discernable pattern to the calling party destination). Tried all combinations of 'progress_ind...' to no avail.

Then tried 'tone ringback alert-no-pi' under each of my outbound pots dial-peers and hey-presto - got ringback consistently!

Afterwards found this doc:

"Troubleshooting No Ringback Tone on ISDN-VoIP (H.323) Calls" found under Technology Support>Voice>GW Protocols>Design>Design Technotes

http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a0080094c33.shtml

HTH

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