The Cisco Technical Assistance Center (TAC) provides unparalleled technical support service to Cisco.
Read the Datasheet: https://www.cisco.com/en/US/docs/voice_ip_comm/cucm/trouble/5_0_1/tb501a.html
Before contacting Cisco TAC:
Please have your Cisco.com User ID, Contract, and Serial number(s) ready when you contact Cisco Support to prevent any delays with your support request.
For all issues, always provide the following information to TAC. Collect and save this information for us upon opening a TAC case and update it regularly with any changes.
Placing the call
After you have gathered the correct information, you will be ready to take a call. There are several different phone numbers to use when calling the TAC, depending on your location in the world.
The current numbers are listed below:
Region telephone numbers
Asia-Pacific: +61 2 8448 7107
North America: +1 800 553 2447
EMEA: +32 2 704 5555
You can also check the TAC Website for local access phone numbers: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
