IP Telephony and Phones

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So I tried to upgrade from isr4400-universalk9.17.12.04b.SPA.bin to isr4400-universalk9.17.12.05a.SPA.bin. After the upgrade it will not register with my SIP provider. I see this.Aug 11 02:08:22.843: %SIP-3-REG_INTERNAL: Registration failed. Tenant=-...

Issue Summary:We are experiencing intermittent issues with stuck parked calls in Cisco Unified Communications Manager (CUCM) version 15.0.1.12900-234. The issue affects random phones and cannot be reproduced on demand.Environment Details:CUCM Version...

We have a Rauland Telecenter and we were able to make announcements using any Cisco phone (dialing 789 would translate to 999 which is the "ALL PAGE" on the Telecenter) when we were using CUCM on premises.About a month ago, we migrated to Cisco Webex...

As per my knowledge, Cisco phones can register with CUCM without a certificate if the CUCM cluster is in mixed mode or non-secure mode. Phones can register using a MIC (if present) or without any certificate, correct?However, if the cluster is in sec...

I'm having a weird issue on our Cube. I have an incoming dial peer that should match outgoing calls to any number with 000 dial-peer voice 1120 voiptranslation-profile incoming add_plussession protocol sipv2session transport udpdestination dpg 999inc...

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Hello Everyone,Today I am going through an issue, I have never experienced.We have a CUCM and a 3rd party PBX, we have connected  both the PBXs over a SIP trunk.I have created an Extension 2045 in the 3rd Party PBX and created a route pattern with th...