From CCNA to Code: How Network Engineers Move Into Telecom Software

If you’ve studied for the CCNA, you already know more about telecom software than you think. You can read a routing table, trace a packet through a NAT boundary, and explain why a VLAN mismatch kills a trunk. What you probably haven’t done yet is write the program that configures fifty of those trunks at once, or the service that answers a 5G core’s API call. That’s the gap between a network engineer and a telecom software engineer, and it’s smaller than most job ads make it look. The current CCNA 200-301 blueprint already gives automation and programmability 10% of the exam, so Cisco itself expects you to know what a REST API and a JSON payload are. This guide shows how to turn that 10% into a real skill set, step by step, with projects you can finish on a laptop.

Why the Line Between Network and Software Got Blurry

Ten years ago, a network engineer’s day revolved around the command line. You logged into a switch over SSH, typed configuration lines one by one, saved, and moved on to the next device. Software was something other teams wrote, and the network just carried their traffic.

That split doesn’t hold anymore, for three practical reasons.

• Scale. An operator with thousands of routers can’t afford to configure each one by hand. A single typo in an access list, pasted into 300 devices, becomes an outage. Scripts and automation tools exist mostly to stop that from happening.
• Controllers. Software-defined networking (SDN) moved part of the decision-making from individual boxes into a central controller. You no longer tell each switch what to do; you tell the controller, usually through an API.
• Virtualization. Network functions virtualization (NFV) turned firewalls, load balancers, and even pieces of the mobile core into software running on ordinary servers. Once a firewall is a virtual machine or a container, deploying it is a software task.

You can see this shift in Cisco’s own certification track. In February 2026, Cisco renamed the DevNet Associate certification to CCNA Automation, keeping the same 200-901 exam, and existing DevNet holders were moved over automatically. Putting “CCNA” on an automation credential is a clear signal: programmability is now treated as part of core networking, not a side specialty.

For you, that’s good news. The networking knowledge you’re building isn’t going to be replaced by code. It’s the thing that makes your code correct.

What Telecom Software Actually Means

“Telecom software” sounds like one job, but it’s really a family of systems. Before you plan a learning path, it helps to know which part of the family you’re aiming at. A longer overview of how telecom products are built, from billing to network management, is available at gloriumtech.com/telecommunications-software-development-a-complete-guide/. Here’s the short version, from a network engineer’s point of view.

OSS and BSS: the operator’s back office

Operations support systems (OSS) keep the network running. They handle inventory (which router sits in which rack, with which line cards), fault management (which alarms fired and why), performance monitoring, and service provisioning. When a customer orders a business internet line, an OSS workflow decides which port, VLAN, and IP block to assign.

Business support systems (BSS) handle the commercial side: product catalogs, orders, billing, and customer accounts. BSS work looks more like classic enterprise software, but the people who build it still need to understand what a “service” means at the network level. A billing rule for a 100 Mbps plan is useless if nobody knows how that plan is enforced on the access router.

Signalling and voice

Voice over IP runs on its own set of protocols. SIP (Session Initiation Protocol) sets up, changes, and ends calls. RTP carries the actual audio. If you’ve ever configured QoS to protect voice traffic, you’ve already met RTP from the network side. Telecom software teams build SIP servers, session border controllers, IVR systems, and call-routing logic, and they spend a surprising amount of time reading packet captures, which is a skill you already practice in Wireshark.

Network functions as software

The 5G core is the clearest example of networking turning into software. In 3GPP’s service-based architecture, core network functions talk to each other through HTTP/2 APIs with JSON as the data format, the same building blocks a web developer uses. Functions like the AMF (access and mobility management) and SMF (session management) are software services, often run in containers. Engineers who understand both the protocol flows and the code that implements them are hard to find, which is exactly why this path is worth your time.

Network automation

This is the most common entry point for people with a CCNA. Network automation engineers write the scripts, playbooks, and pipelines that configure and check devices. It’s telecom software in the plainest sense: code whose whole job is to make the network behave.

How Your CCNA Knowledge Maps to Software Work

A lot of CCNA learners assume they’re starting from zero on the software side. You aren’t. Most of what you’ve studied has a direct software counterpart. The table below shows where your current knowledge plugs in.

The pattern is the same in every row. You already know what the correct state looks like. Software lets you check or create that state at scale, without typing it by hand.

There’s also a mindset overlap. Troubleshooting a network is debugging: form a hypothesis, test it, narrow the scope. Developers do the same thing with logs and stack traces. If you’re good at following a packet hop by hop, you’ll get comfortable following a program line by line faster than you expect.

What’s genuinely new is the habit of writing things down as code: version control, testing, and code review. Those aren’t hard ideas, but they take practice, and they’re what separate someone who “knows a bit of Python” from someone a team can hire.

A Staged Learning Path From CCNA to Code

Don’t try to learn everything at once. The order below is built so that each stage gives you something useful at work, even if you stop there for a few months.

1. Get comfortable on Linux. Most network tools, automation servers, and telecom platforms run on Linux. Learn to move around the file system, edit files with nano or vim, manage packages, read logs, and use SSH keys. Two or three weeks of daily practice in a virtual machine is enough to stop feeling lost.
2. Learn Git early. Put your lab configs in a Git repository from day one. Learn commit, branch, merge, and pull request. Every automation team stores its work in Git, and interviewers often ask to see a repository.
3. Learn Python basics, with network examples. Variables, lists, dictionaries, loops, functions, and reading and writing files. Practise with networking data instead of generic exercises: parse a list of IP addresses, count interfaces that are down, or split a config file into sections.
4. Talk to devices from code. Use libraries like Netmiko to log into lab routers over SSH and run show commands from a script. Then learn to parse the output into structured data instead of reading it by eye.
5. Work with APIs and data formats. Learn how REST APIs work (GET, POST, PUT, DELETE, status codes, authentication tokens) and get fluent with JSON and YAML. Postman is a friendly way to explore an API before you write code against it.
6. Learn model-driven programmability. NETCONF and RESTCONF let you configure devices through structured models instead of raw CLI text. YANG is the modeling language that defines what those models look like. This is where your CCNA knowledge pays off most, because a YANG model of an interface only makes sense if you already understand interfaces.
7. Add Ansible. Ansible lets you describe the state you want in YAML playbooks and apply it across many devices. It’s often the first tool teams adopt, so it shows up in a lot of junior automation job descriptions.
8. Pick a telecom specialty. Once the basics feel natural, go deeper in one direction: SIP and VoIP, OSS workflows and inventory, or 5G core and cloud-native networking (containers, Kubernetes, HTTP/2 APIs).

Where certifications fit

Certifications help you structure study, and they give recruiters a quick filter. A sensible sequence for this path is CCNA first, then CCNA Automation (exam 200-901, the former DevNet Associate) once you’re comfortable with Python and APIs. If you’re still deciding between vendor tracks, CompTIA Network+ covers similar fundamentals without the Cisco focus, and Linux certifications can help if you’re aiming at telecom platform roles.

Treat certifications as a map, not the destination. A hiring manager for an automation role will usually care more about a working script in your GitHub than a second badge on your profile.

How long does this take?

It depends on your starting point and how many hours you put in each week, so be wary of anyone who promises a fixed timeline. As a rough guide, many learners find Linux and Git take weeks rather than months, while Python and API work take longer because you need to build things, not just read about them. Plan in stages, and measure progress by projects finished, not chapters read.

Beginner Projects That Prove You Can Do the Work

Projects are where learning turns into evidence. Each one below uses a free lab environment (Cisco Modeling Labs, GNS3, EVE-NG, or Cisco’s public DevNet sandboxes) and can be shown in a GitHub repository with a short README.

• Config backup script. Write a Python script that logs into every device in an inventory file, pulls the running config, and saves it with a timestamp. Then commit each backup to Git so you can see exactly what changed between days.
• Interface health report. Collect interface status, errors, and descriptions from several switches and produce a simple CSV or HTML report. Flag any interface that’s up but has no description, a classic audit finding.
• Subnet calculator and validator. Build a small tool that takes a site’s address plan and checks for overlaps, wrong masks, and gateways outside their subnets. You’ve done this by hand for the exam; now make the computer do it.
• VLAN provisioning playbook. Write an Ansible playbook that adds a VLAN to a set of switches and trunks it on the right uplinks, then run it twice to prove it doesn’t make duplicate changes.
• REST API explorer. Use Postman, then Python, to query a sandbox controller for its device list and health data. Save the JSON responses and write code that summarizes them.
• NETCONF config change. Use a NETCONF client library to read an interface’s config from a lab router as structured data, change its description, and confirm the change.
• SIP call lab. Set up an open-source SIP server such as Asterisk in a virtual machine, register two softphones, place a call, and capture the SIP and RTP traffic in Wireshark. Write a short explainer of each message in the call flow.

A good README matters as much as the code. Explain what problem the project solves, how to run it, and what you’d improve next. That last part shows an interviewer that you think like an engineer, not someone copying a tutorial.

Roles to Target and How to Position Yourself

Job titles in this space overlap and vary by company, so read descriptions carefully rather than relying on the title alone. Here’s how three common roles compare.

For most CCNA holders, network automation engineer is the realistic next step. It values your networking knowledge directly and lets you build coding experience on the job. Telecom software developer roles tend to come later, once you’ve written enough real code to pass a programming interview.

The demand side is encouraging. The US Bureau of Labor Statistics projects that employment of software developers, quality assurance analysts, and testers will grow 15% from 2024 to 2034, much faster than the average for all occupations. That figure covers software roles in general, not telecom specifically, but it tells you the coding half of your new skill set is in steady demand. Pay varies widely by country, city, and employer, so check current local listings rather than trusting a single salary headline.

How to present yourself

• Rewrite your CV around outcomes. “Wrote a Python script that backs up 40 switch configs nightly” beats “familiar with Python.”
• Link your GitHub. Pin your best three projects and make sure each one has a clear README.
• Volunteer for automation at your current job. If you work in a NOC or on a support desk, offer to script one repetitive task. That small win is real experience you can talk about in interviews.
• Speak both languages in interviews. When asked about an automation project, explain the network problem first, then the code. That combination is what hiring managers in telecom are looking for.
• Read job ads for keywords. If several postings mention NETCONF, Kubernetes, or SIP, add a project that uses that tool before you apply.

Frequently Asked Questions

Do I need a computer science degree to move into telecom software?

Not for most automation roles. Many network automation engineers came from networking backgrounds and learned programming on the job or through self-study. Deeper telecom software developer roles, especially those building network functions, are more likely to ask for a degree or strong programming experience, but a solid project portfolio can often stand in for it.

Should I finish the CCNA before learning Python?

Finishing the CCNA first is usually the better order. The networking concepts give your code something meaningful to do, and the automation and programmability section of the exam introduces REST APIs and JSON in a networking context. You can start small Python exercises alongside your CCNA study, as long as they don’t push your exam date back.

Which programming language should I learn first?

Python. It’s the standard language for network automation, most networking libraries and vendor examples use it, and its syntax is friendly for beginners. If you later move into deeper telecom software, you may pick up Go, Java, or C++, depending on the team.

Is network automation going to replace network engineers?

Automation replaces repetitive typing, not engineering judgment. Someone still has to design the network, decide what the correct state is, and troubleshoot when reality doesn’t match the plan. Engineers who can automate their own work tend to become more valuable, not less.

Can I practice without buying hardware?

Yes. Cisco Modeling Labs, GNS3, and EVE-NG run virtual routers and switches on a laptop or a cloud VM, and Cisco’s DevNet sandboxes give free, time-limited access to real controllers and devices. For voice labs, a single Linux virtual machine running an open-source SIP server is enough to start.

How is NETCONF different from just using SSH and the CLI?

With SSH and the CLI, your script sends text commands and gets back text that it has to parse. With NETCONF, the device exchanges structured data defined by YANG models, so your code knows exactly which field is the interface name and which is its status. That makes automation far more reliable, especially across many devices.

Key Takeaways

Your CCNA is a foundation for software work, not a detour from it. Start with Linux and Git, then learn Python using networking data, and only then move on to APIs, NETCONF/YANG, and Ansible. Build three or four small projects from the list above, put them on GitHub with clear READMEs, and aim for a network automation role as your first step. Once you’ve written real code for real networks, telecom software developer roles in OSS, voice, or the 5G core become a realistic next move rather than a leap.