Cisco Voice Engineer Interview Preparation

Practise Cisco Voice Engineer Mock Interview Online
Amp up your Interview Preparation.
star star star star star
712 people were interviewed and received feedback, 62 people have rated it.
Cisco Voice Engineer Interview Prep

1 Free Guide Here

Read this free guide below with common Cisco Voice Engineer interview questions

2 Mock Video Interview

Mock video interview with our virtual recruiter online.

3 Evaluation

Our professional HRs will give a detailed evaluation of your interview.

4 Feedback

You will get detailed, personalized, strategic feedback on areas of strength and of improvement.

Expert Tip

Avoid Negative Comments About Previous Employers

Speaking negatively about previous employers or colleagues can leave a bad impression. Instead, focus on what you learned from past experiences.

Top 10 Cisco Voice Engineer Interview Questions and Answers

As a Cisco Voice Engineer, you'll be responsible for designing, implementing, and troubleshooting unified communications solutions. To help you prepare for your upcoming interview, we've compiled a list of the top 10 Cisco Voice Engineer Interview Questions and Answers.

1. What is Cisco Unified Communications?

Cisco Unified Communications is a comprehensive set of integrated solutions for voice, video, and data communication. It provides a single platform for users to communicate, collaborate, and share information from anywhere, at any time.

2. What is a dial plan?

A dial plan is a set of rules that determines how phone numbers are translated into meaningful destinations. In a Cisco Unified Communications system, the dial plan defines how calls are routed within the system and to the PSTN.

3. Can you explain the different types of Cisco Unified Communications endpoints?

The different types of endpoints include IP phones, softphones, video endpoints, and specialized endpoints such as paging systems and intercoms. Each endpoint is designed to provide a different level of functionality and flexibility.

4. What is QoS and how does it relate to VoIP?

QoS (Quality of Service) is the ability to prioritize certain types of traffic on a network. In VoIP, QoS is critical to ensure that voice traffic is given the highest priority, so there is no degradation in call quality or dropped calls.

5. What is codec and why is it important in VoIP?

A codec is a software algorithm that compresses and decompresses audio or video signals. In VoIP, codecs are used to reduce the bandwidth requirements for voice traffic without compromising quality. The choice of codec can also impact call quality and network bandwidth utilization.

6. How do you troubleshoot a call quality issue in a Cisco Unified Communications system?

The first step in troubleshooting call quality is to isolate the problem. This may involve checking the network infrastructure, checking the endpoints, or analyzing call records. Once the problem has been identified, the next step is to implement a solution, which may involve adjusting QoS policies, tweaking codec settings, or identifying and fixing hardware or software issues.

7. What is the difference between H.323 and SIP protocols?

H.323 and SIP are two protocols used in VoIP communications. H.323 is an older protocol that is often used in legacy systems, while SIP is a newer protocol that is more efficient and adaptable. SIP is also more popular in Cisco Unified Communications systems.

8. What is an SRST router and how does it relate to Cisco Unified Communications?

An SRST router is a router that is used as a backup in the event of a failure in the Cisco Unified Communications system. SRST stands for Survivable Remote Site Telephony, and it allows users to continue making and receiving calls even in the event of a failure in the main system.

9. What is CUCM and why is it important?

CUCM (Cisco Unified Communications Manager) is the core component of a Cisco Unified Communications system. It provides call processing, call routing, and call management services for voice, video, and data communications. CUCM is critical to the overall functioning of the system, and it is important for a Cisco Voice Engineer to have a strong understanding of how it works.

10. How do you ensure security in a Cisco Unified Communications system?

There are several ways to ensure security in a Cisco Unified Communications system, including implementing strong password policies, encrypting voice traffic, enabling firewalls, and implementing access control. It's important to have a comprehensive security plan in place to protect against attacks and unauthorized access.

In conclusion, these are some of the most common Cisco Voice Engineer interview questions and answers to help you prepare for your next interview. It's important to have a strong understanding of Cisco Unified Communications, as well as VoIP protocols, codecs, and quality of service. With the right preparation, you can impress your interviewer and land your dream job as a Cisco Voice Engineer.

How to Prepare for Cisco Voice Engineer Interview

Cisco systems are widely used in communication and organizations looking for network and communication solutions. As a Cisco voice engineer, you should be ready to demonstrate your competency in communication and networking systems to be hired. The interview process for a Cisco voice engineer involves various stages, and it is essential to prepare fully to be successful in every step. In this article, we will provide you with the tips on how to prepare for the Cisco voice engineer interview.

1. Understand the Job Requirements

Before the interview, it’s important to read through the job description and understand the job requirements. This will help you identify areas in which you need to improve and will help you tailor your responses to the specific requirements of the role. This will also demonstrate to the hiring manager that you are engaged, aware of the requirements, and are already thinking about how to fulfill them.

2. Brush up on Core Technical Skills

As a Cisco voice engineer, technical skills are crucial. Make sure that you brush up on your core technical skills such as VoIP technologies, SIP, H.323 signaling protocols, WAN technologies, and Linux administrations. Practice your skills with some practice exams, which will also help you identify areas in which you need to improve.

3. Understand VoIP Fundamentals

A Cisco voice engineer will often work with Voice over IP (VoIP) systems. Ensure you have a strong understanding of VoIP fundamentals and keep up with the latest technologies and trends in the field. You should know the fundamentals of codecs, signaling protocols, and Quality of Service (QoS).

4. Be Familiar with Cisco Products and Services

Cisco products and services are extensive and widely used. You should have a strong understanding of popular Cisco products and services such as Cisco Unified Communications Manager (CUCM), Cisco WebEx, and Unified Communications Manager Express (CUCME).

5. Be Prepared to Discuss Experience

Make sure that you are well prepared to discuss your experience with Cisco systems and your career background. Be specific about your contribution to various projects and be prepared to provide examples of how you solved problems on previous assignments. By showcasing your experience, you demonstrate that you have the practical knowledge and competence to work as a Cisco voice engineer.


Cisco Voice Engineer interviews are often demanding and competitive. By preparing appropriately, you improve your chances of success. Review the job requirements, brush up on your technical skills, understand VoIP fundamentals, be familiar with Cisco products and services, and articulate your experience with Cisco systems. By following these tips, you stand a better chance of impressing the interviewer and getting the job. Good luck!

Common Interview Mistake

Negotiating Salary Too Early

Raising the salary question too early in the interview process may give the impression that you're primarily motivated by money. Wait until a job offer is on the table before discussing salary.