SIP trunk between CUCM6 and CUCM8

Hello everyone!


We've got SIP trunk between CUCM 6 and CUCM 8


The problem is that particular numbers from particular partitions and CSS from CUCM 6 can not reach phones on CUCM 8. However, some other numbers from CUCM 6 with the same CSS and Partition can dial to CUCM 8. To be more specific, I will give you and example.


Imagine, there is a number 6401 with CCS1 and Partition1. This number is unable to reach CUCM8. But, there is another number, 6402 with CSS1 and Partition1 which can reach CUCM8. Moreover, if I reset 6401, or change partition order in CSS1, 6401 dials to CUCM8 for a period of time, but then stops working again.

If I put 6401 in CSS2 and Partition2, in which other phones can reach CUCM8, 6401 works for a period of time, and then again fails to call to CUCM8


Calls from CUCM8 to 6401 are always succesfull. I tried to recreate CSS1, it did not help.


DNA from 6401 to CUCM8 show "Route this pattern".


I am out of thoughts, will appreciate any help. Thank you in advance.
LVL 18
fgasimzadeAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

EyeNoVoIPCommented:
That is very weird indeed.  Can you post your route patterns and SIP Trunk Config to and from CUCM6 & CUCM8?  Are you using Route Groups or translation patterns that might be catching things in the wrong direction?
0
fgasimzadeAuthor Commented:
Well, after all investigations done I found out that the problem was only on those IP phones registered on our remote CUCM, which was our subscriber. I changed IP phone registration to publisher and call through SIP trunk are now successful
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
fgasimzadeAuthor Commented:
Well, after all investigations done I found out that the problem was only on those IP phones registered on our remote CUCM, which was our subscriber. I changed IP phone registration to publisher and call through SIP trunk are now successful
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
IP Telephony

From novice to tech pro — start learning today.