Ringback Issue

[jbillingsley]

Hey Everyone,

I'm dealing with a strange ringback issue, and was wondering if anyone else had some ideas. I'm using CM 4.1.3, 3825 gateway running 12.4(24)T4, and IPCC 4. This is the call flow:

PSTN ---> H323 Gateway ----> translation pattern ------> CTI RP -----> IPCC

So when I have this call flow, outside callers only get 1 ringback and then silence until the call is picked up. The ip phone rings normally. Of course, this is confusing callers when they're not getting proper ringback.

If I call the CTI RP internally, the ringback is normal. If I change the translation pattern to just point to a hunt pilot in CM then ringback in normal. This seemed to indicate an issue with the gateway. I was running older 12.4 code so I moved to 12.4(24)T4, but that had no affect.

The other strange thing is that I have other numbers taking this same call flow, but the ringback is fine for them. It's only 1 number that I'm having a problem with.

Any suggestions would be appreciated.

-Jake

[dave.hodgkiss]

Hi Jake,

Do all the inbound numbers translate to the same route point ? If not you may want to check the IPCC script has the correct configuration for that route point.

Are you using E1/T1

Regards

Dave

[jbillingsley]

Hi Dave,

The call routes properly. What specific settings in the configuration in the script should I check for?

Thanks,

Jake

[dave.hodgkiss]

What does your script do with the call ? Does the call get answered straight away by IPCC then present the caller with options. I.E 1 for this 2 for that ?

Once the caller makes a decision and presses 1 or 2 ringback is usually generated by the annunciator until the call is answered. Does the route point for this number use the same MRGL as the others.

regards

Dave

[jbillingsley]

Actually, all the script does is a time check. It routes to different extensions based on time of day and holiday.

[dave.hodgkiss]

Does the incoming number translate to the same route point as the other numbers which have no issues ?

[jbillingsley]

Yes it does.

[dave.hodgkiss]

Have you tried translating your incoming number to a physical IP phone to see if ringback is generated ?

[jbillingsley]

Yes, I have. I get the proper ringback when I send it to a physical phone. That's what I'm doing right now as a workaround.

[dave.hodgkiss]

Is it ISDN30

[jbillingsley]

Yup, it's a PRI

[dave.hodgkiss]

You might want to restart the Cisco ip voice media streaming APP on your tftp server and try again.

[jbillingsley]

Just did that and I'm getting the same result.

Weird, huh?