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SNR-Not working for AT&T users only

So one of my customers is having a problem with their single number reach. It rings the desk phone properly,  but does not ring the users cell phone. After quite a bit of testing with different cell phone's, It was found that all AT&T phones (tested 3 different ones) would not ring along with the desk phone. Verizon and Sprint cell phones rang with the desk phone. Any thoughts? Thanks!

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Will you be able to post

Will you be able to post debugs from the gateway? If it has a PRI, debug isdn q931, if its SIP, debug ccsip messages.

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Community Member

George, Thanks for the



Thanks for the response. I have actually opened a TAC case on this issue. But, I did run the isdn debug, and you can see a disconnect. Signs tend to point to the problem being on the service providers side. 

Speculating here, but try to

Speculating here, but try to set the ISDN Plan/type appropriately if its not being set correctly.

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Thanks for the suggestion. I

Thanks for the suggestion. I'll look into this.

Community Member

 The fix ended up being under


The fix ended up being under the PRI configuration in CUCM. unchecking the "Redirecting Number IE Delivery— Outbound " box fixed the issue. Thanks for the assistance. 



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