Troubleshooting Cisco IP Telephony and Video (CTCOLLAB)

Here you have the best Cisco 300-080 practice exam questions

  • You have 157 total questions to study from
  • Each page has 5 questions, making a total of 32 pages
  • You can navigate through the pages using the buttons at the bottom
  • This questions were last updated on December 14, 2025
  • This site is not affiliated with or endorsed by Cisco.
Question 1 of 157
An IP phone that is connected through a Cisco Catalyst 3750 Series Switch is failing to register with the subscriber as a backup server. When the user presses the settings button on the phone, only the Cisco Unified Communications Manager publisher shows as registered. What is the most likely cause for this issue?
Correct Answer: B

Question 2 of 157
Refer to the exhibit.
Exam 300-080: Question 2 - Image 1
An IP phone that is connected through a Cisco Catalyst 3750 Series Switch is failing to register with Cisco Unified Communications Manager. When the user presses the settings button on the phone, the Operational VLAN ID shows a blank entry. What is the most likely cause for this issue?
Correct Answer: D

Question 3 of 157
You configured a Cisco ISR G2 as a SIP gateway, but the gateway does not show that it is registered with Cisco Unified Communications Manager. What is causing this issue?
Correct Answer: E

Question 4 of 157
Which issue would cause an MGCP gateway to fail to register with Cisco Unified Communications Manager?
Correct Answer: B

Question 5 of 157
Endpoints are configured for both H.323 and SIP using the same URI and Cisco VCS settings, but the endpoints register only as H.323 endpoints. What is causing this issue?
Correct Answer: B