Guide
Upgrading analogue CCTV to IP: what you can keep and how to phase it
How to move a commercial CCTV system from analogue to IP without replacing everything at once: the signs it's time, what can be reused, hybrid and phased options, and the IT security points to plan for.
Many commercial CCTV systems are still analogue, or a mix of analogue and newer equipment added over the years. They record, but the images are often too poor to identify anyone, the recorder is out of support, and finding an incident means scrolling through hours of footage.
Moving to IP does not have to mean replacing everything at once. This guide explains what can usually be kept, the options for reusing cameras and cabling, and how to phase an upgrade. For a wider overview, see our commercial CCTV system guide.
Signs your system is due for an upgrade
- Footage shows that an incident happened but not who was involved
- The recorder or cameras are no longer supported by the manufacturer
- Cameras are failing and replacement parts are hard to find
- Searching for an incident takes hours rather than minutes
- Footage cannot be viewed remotely, or only through an insecure method
- The system cannot meet your IT team’s security requirements
- New areas need coverage, and the recorder has no spare channels
Analogue, HD analogue and IP: the difference
| Standard analogue | HD analogue | IP | |
|---|---|---|---|
| Cabling | Coax | Coax | Network cable, usually with power over Ethernet |
| Image quality | Low | Good | Good to very high |
| Recorder | DVR | DVR or hybrid recorder | NVR or video management software |
| Analytics and search | Very limited | Limited | Extensive, depending on the platform |
| Worth keeping? | Rarely | Often, if in good condition | Yes, if supported |
Older standard-definition cameras are rarely worth keeping. HD analogue cameras installed in the last several years often are, as long as they are in good condition and cover the right areas.
What you can reuse
Cameras
A survey checks each camera’s type, condition, image quality and position. Cameras that are still good enough can stay, while the rest are replaced. On the West London College project, 23 existing cameras were modern enough to work with the new system and were retained, alongside 80 new IP cameras.
Recorders: hybrid options
A hybrid recorder accepts analogue and HD analogue cameras alongside a number of IP cameras. Hikvision’s Turbo HD recorders, for example, detect several analogue formats automatically and accept a limited number of IP channels. A hybrid recorder suits a site that wants to add IP cameras now and replace analogue ones gradually.
Encoders
A video encoder converts an analogue camera’s signal into a network stream, so the camera can be recorded by an NVR or video management software. Axis, among others, makes encoders for this purpose. Encoders let a site move to a single IP platform while keeping cameras that are still working.
Cabling: Ethernet over coax
Recabling is often the largest cost of an upgrade, particularly where cable routes run through finished ceilings or between buildings. Ethernet over coax adapters carry network data, and often power, over existing coax cable. Each run should be tested first, because old cable can be damaged or poorly terminated.
Full replacement, hybrid or phased
| Approach | Suits | Advantages | Considerations |
|---|---|---|---|
| Full replacement | Small sites, or systems with nothing worth keeping | One project, consistent equipment | Highest initial cost |
| Hybrid | Sites with good HD analogue cameras | Lower cost, faster | Two technologies to maintain for a time |
| Phased | Large or multi-site estates, or limited budgets | Spreads cost, priorities first | Needs a clear plan across all phases |
A typical phased plan
| Phase | Work | Outcome |
|---|---|---|
| 1. Survey and design | Record existing cameras, cable routes and coverage gaps; agree requirements and IT security | A design for the finished system, not just the first phase |
| 2. Platform | Install the new recorder or video management software, licensed for future cameras | One system to view and search from day one |
| 3. Priority areas | Replace cameras at entrances, cash areas and other high-risk points | Identification-quality images where they matter most |
| 4. Remaining cameras | Replace or encode the rest, and add coverage to new areas | Analogue equipment retired |
| 5. Maintenance | Service, firmware updates and health monitoring | A system that stays reliable and secure |
Choose a platform in phase 2 that will support the finished system. On the West London College project, HikCentral Professional was licensed for 150 channels against 103 camera positions, so the college can expand without changing platform.
Plan for IT security from the start
An IP system is a network of computers. It should be designed with your IT team, not added to the network afterwards. Common requirements include:
- a separate network or VLAN for CCTV
- no direct internet access from cameras or recorders
- remote access through a VPN, not port forwarding
- default passwords removed and individual user accounts created
- encrypted connections and audit logging
- firmware updates as part of maintenance
These were all part of the West London College design, which was built to support the college’s Cyber Essentials work.
Plan for data protection too
An upgrade improves image quality, and better images mean more identifiable personal data. Review your DPIA, signs and retention policy as part of the project, and check that the new system can redact footage for subject access requests. Our guide to CCTV and GDPR covers these points.
Questions to ask before you start
- Which existing cameras are worth keeping, and why?
- Can the existing cabling be reused, and has it been tested?
- What will the finished system look like, not just the first phase?
- Is the platform licensed for future cameras?
- How will the system meet our IT security requirements?
- How will disruption be kept to a minimum during the work?
- What maintenance and support is included afterwards?
We upgrade analogue CCTV to IP for commercial, education and public sector sites, keeping cameras that are still worth keeping and phasing the work to suit your budget. Request a free CCTV site survey or read more about our CCTV services.
Frequently asked questions
Can I keep my analogue cameras when upgrading to IP?
Often, some of them. HD analogue cameras in good condition can stay on a hybrid recorder or be connected through encoders, while older standard-definition cameras are replaced. A site survey identifies which cameras are worth keeping.
Can IP cameras use existing coax cable?
They can, using Ethernet over coax adapters, which carry network data and often power over the existing cable. It avoids recabling where routes are difficult, but each run should be tested before it is relied on.
What is a hybrid recorder?
A recorder that accepts analogue and HD analogue cameras alongside a number of IP cameras. It lets you add IP cameras now and replace analogue ones over time without changing the recorder again.
How long does an analogue to IP upgrade take?
It depends on the size of the site and how it is phased. A small site may be completed in days. A multi-site estate is usually planned in phases over months, with the most important areas done first.
Does an IP CCTV system need to go on our IT network?
It needs a network, but not necessarily your main one. Many organisations use a separate network or VLAN for CCTV, with no direct internet access from cameras or recorders. Agree the arrangement with your IT team at design stage.