Almost every CCTV quotation starts with the same client question: “Should we go IP or analog?” In 2026 the answer is not simply “IP for everyone”. HD analog (HD-TVI, HD-CVI and AHD) is still a sensible choice on the right site, especially where good coax is already in the walls. Here is how I compare the two on a real project.
Quick answer: Choose IP cameras for new buildings, any site above about 16 cameras, and anywhere you need AI analytics, licence plate recognition, face search or integration with access control and a VMS. Choose HD analog (TVI/CVI/AHD) for small sites with existing coax, long single cable runs without intermediate power, or budget upgrades where a hybrid XVR lets you add IP cameras later. Many real projects end up hybrid.
How Each System Works
HD analog: coax plus a DVR or XVR
An HD analog camera captures the image and sends it as an HD video signal down a 75-ohm coaxial cable (normally RG59, or RG59 Siamese with a power pair). The camera does not compress or store anything. The DVR at the other end digitises, compresses and records each channel.
- Cable: one coax home run per camera, terminated with BNC connectors.
- Power: 12 V DC from a central fused power supply, or PoC (Power over Coax) when both the camera and the recorder support it.
- Recorder: a DVR, or an XVR / HVR (hybrid) that accepts HD analog channels and a number of IP channels.
- Format: TVI, CVI and AHD are different signal formats. Most current recorders auto-detect them, but always check the camera and recorder datasheets match.
IP: UTP plus PoE plus an NVR
An IP camera is a small computer. It captures, compresses (H.264 or H.265) and streams video over Ethernet. A single Cat6 UTP cable carries video, control and power.
- Cable: Cat6 from each camera to a PoE switch (or a PoE port on the NVR), terminated on a patch panel at the rack.
- Power: PoE to IEEE 802.3af (15.4 W per port at the switch), 802.3at / PoE+ (30 W) or 802.3bt (60 W or 90 W) for PTZs and heaters.
- Recorder: an NVR for small and medium sites, or VMS servers for large ones.
- Network: cameras need IP addresses, ideally a dedicated CCTV VLAN, and basic cybersecurity hardening.
For full wiring schematics, connector details and voltage drop examples, see my CCTV installation and wiring guide for HD analog and IP cameras.
IP vs Analog: Side-by-Side Comparison
| Factor | HD Analog (TVI / CVI / AHD) | IP Cameras |
|---|---|---|
| Typical resolution | 2 MP to 8 MP (4K) on current ranges | 2 MP to 12 MP and higher, plus panoramic and multi-sensor |
| Cable | RG59 coax (or Cat6 with video baluns) | Cat6 UTP; fibre for backbone and long runs |
| Typical distance per run | Several hundred metres on good copper coax, depending on resolution and format | 100 m per copper segment, then a switch, extender or fibre |
| Power | Separate 12 V DC or PoC | PoE from switch or NVR |
| Where video is compressed | In the DVR/XVR | In the camera |
| Analytics / AI | Basic; some XVRs add human/vehicle filtering | Full range at the edge and on servers |
| Scalability | Limited by recorder channel count | Practically unlimited with switches, NVRs and VMS |
| Installation skill | Simple, plug and play | Needs IP planning, VLANs, PoE budget |
| Integration | Limited, mostly brand-locked | ONVIF, RTSP, access control, VMS, BMS |
| Best fit | Small sites, existing coax, budget upgrades | New builds, medium and large sites, critical facilities |
Resolution and Image Quality
Modern HD analog is far better than the old 960H days. Mainstream ranges cover 2 MP to 8 MP (4K), and in daylight a good 4 MP analog camera can look close to a 4 MP IP camera.
The difference shows when you go higher or need more control. IP cameras go beyond 8 MP, offer multi-sensor and fisheye models, dual streams with independent settings, smart codecs, corridor mode and better low-light sensors on premium ranges. If you need to identify faces at a wide gate or read plates, choose the camera by pixels per metre, not by headline megapixels. The FOV and lens calculator helps you check that before you order.
Pro tip: At 8 MP, analog cable distance usually drops compared with 2 MP. Read the datasheet for the distance at the resolution you actually plan to run.
Cabling Distance
This is where analog still wins on paper.
- HD analog over coax: manufacturers typically quote several hundred metres per run on pure copper RG59 for 1080p, with shorter figures at 5 MP and 8 MP. Video baluns over Cat6 also give useful distances. Copper-clad aluminium (CCA) coax cuts these figures sharply.
- IP over UTP: Ethernet is limited to 100 m per copper segment, including patch cords. I design for about 90 m. Beyond that you add a PoE switch or extender in the field, or run fibre with SFP uplinks.
On a large plot, analog can avoid field switches and power points. IP solves the same job with fibre and small outdoor switches: more cost up front, but a backbone you can reuse for access control, Wi-Fi and intercom.
Power
Analog cameras are usually fed from a central 12 V DC power supply through the power pair of a Siamese cable. On long runs voltage drop becomes the real limit, not the video. PoC removes the separate pair, but you need a PoC recorder or PoC transceivers, and the supported distance is usually shorter than video alone.
IP cameras take their power from the switch. That gives you one UPS in the rack instead of many small supplies, remote port reboot on managed switches and real-time power monitoring. The trade-off is that you must calculate the PoE budget, including the extra load from IR at night and heaters on outdoor or PTZ cameras.
Analytics and AI
In 2026 this is often the deciding factor.
- HD analog: many current XVRs offer human and vehicle classification to cut false motion alarms, and some offer basic line crossing and intrusion detection. Features vary by brand and firmware, and they run in the recorder, so channel count limits how many cameras get them.
- IP: analytics can run on each camera (edge AI), on the NVR, or on a VMS or AI server. Typical functions include perimeter protection with object classification, licence plate recognition, face detection and search, people counting, heat maps, loitering and attribute search (“red car”, “person with backpack”).
If the client wants smart search, LPR at the gate or integration with access control and alarms, the decision is already made: go IP.
Scalability
An analog system grows in steps of recorder channels: 4, 8, 16, 32. When the DVR is full, you add another recorder and another home run for every new camera.
An IP system grows on the network. Add a switch near the new area, run one fibre or Cat6 uplink, and connect cameras locally. NVRs can be stacked, and a VMS can manage hundreds of cameras across multiple buildings or sites from one control room. Before expanding, check NVR incoming bandwidth and storage.
Cost Factors
I will not give prices here because they change by market, brand and project size. What matters is where the money goes:
- Equipment: analog cameras and DVRs are generally cheaper per channel at small sizes. The gap has narrowed a lot for entry-level IP.
- Cabling and labour: reusing existing coax can remove most of the cabling cost. On a new build, Cat6 and coax installation effort is similar.
- Network equipment: IP needs PoE switches, fibre, SFPs and sometimes outdoor cabinets. Small IP systems can avoid this with a PoE NVR.
- Power: analog needs power supplies and sometimes local power points at remote cameras. PoE centralises power in the rack.
- Storage: both depend on resolution, frame rate, codec and retention, so size it properly either way.
- Lifecycle: IP is easier to expand, integrate and support over 7 to 10 years. On many sites this outweighs the lower starting cost of analog.
Upgrading an Existing Coax Site
This is the most common real-world scenario: an old analog system with RG59 already pulled through the building. You have three practical routes.
Option 1: HD analog cameras with an XVR
- Test each coax run for continuity, shorts and damaged BNCs. Re-terminate with crimp or compression BNCs.
- Replace old cameras with HD analog cameras of a format your new recorder supports.
- Install a hybrid XVR, so you can add a few IP cameras later (for example at the gate for LPR).
- Reuse the existing power supplies only after checking voltage at the camera under IR load.
Option 2: PoC to clean up power
Where the power pair is damaged or missing, PoC cameras with a PoC XVR (or PoC transceivers) let one coax carry video and power. Check the supported distance and power per channel in the datasheet.
Option 3: EoC converters to run IP over the old coax
Ethernet over Coax (EoC) extenders turn an existing coax run into an Ethernet link. Many models also pass PoE, so an IP camera can sit at the far end of the old coax. This is a good tool for long runs, heritage buildings or areas where you cannot pull new cable. It is less neat than native Cat6 and adds a device at both ends, so I use it for selected runs rather than a whole site.
Pro tip: On upgrade jobs, quote a hybrid design: HD analog on good coax runs, IP for new areas and high-value points, all recorded on an XVR or an NVR plus EoC. The client gets a lower first cost and a clear path to full IP.
Decision Table by Site Type
| Site type | Typical recommendation | Why |
|---|---|---|
| Villa / residence | IP with a PoE NVR for new builds; HD analog with XVR if good coax exists | Small camera count, short runs, app-based remote view; IP adds better night images and smart alerts |
| Shop / small retail | HD analog or entry-level IP | Budget-driven; existing coax is common; IP if POS integration or people counting is needed |
| Warehouse | IP with field PoE switches and fibre backbone | Long distances, high ceilings, loading bay and perimeter analytics, LPR at gates |
| Mall / large commercial | IP with VMS | Hundreds of cameras, control room, integration with access control, fire alarm and BMS, people counting |
| Oil & gas / industrial | IP with fibre, industrial switches and certified cameras where required | Remote and hazardous areas, client specifications, integration with SCADA and security systems; analog only where the specification allows it |
For oil and gas and other hazardous sites, always follow the client specification and the hazardous area classification. Explosion-proof camera housings, approved cable glands and earthing details matter more than the IP vs analog debate. To plan the network side of a larger IP system, try the Network and CCTV Designer.
Common Problems and Fixes
| Problem | System | Likely cause | Fix |
|---|---|---|---|
| No picture after upgrade | Analog | Format mismatch (TVI vs CVI vs AHD) | Set the channel format on the recorder or switch the camera output mode (method varies by model) |
| Rolling lines or noise | Analog | Ground loop, CCA coax, power cable nearby | Pure copper coax, ground loop isolator, re-route |
| Camera reboots at night | Both | Voltage drop or PoE budget exceeded when IR turns on | Thicker cable or local PSU; check switch PoE budget |
| IP camera drops offline | IP | Run over 100 m, bad termination, faulty port | Shorten the run, re-terminate, add a field switch or fibre |
| EoC link unstable | IP over coax | Poor coax, splices, bad BNCs | Test and re-terminate the coax; check extender rated distance |
For a longer list of faults, see the CCTV troubleshooting guide.
Frequently Asked Questions
Is IP better than analog CCTV in 2026?
For new installations, medium and large sites, and anywhere you need AI analytics or integration, yes. HD analog is still a good choice for small sites with existing coax and tight budgets.
Can I use IP cameras with my existing coax cable?
Yes, with Ethernet over Coax (EoC) extenders at each end of the run. Many support PoE, so the camera can be powered through the coax. Test the coax quality first.
What is the difference between a DVR, XVR and NVR?
A DVR records HD analog cameras over coax. An XVR (or HVR) is hybrid: it records HD analog cameras and a number of IP cameras. An NVR records IP cameras over the network.
How far can I run an HD analog camera on coax?
Typically several hundred metres on pure copper RG59, with shorter distances at higher resolutions. The exact figure depends on the format, the resolution and the manufacturer, so check the datasheet.
Are TVI, CVI and AHD compatible with each other?
Not directly, but most current recorders accept all three, and many cameras can switch output format. Confirm compatibility on both datasheets before ordering.
Does analog CCTV support AI analytics?
Partly. Many XVRs offer human and vehicle detection to reduce false alarms. Advanced features such as LPR, face search and attribute search are mainly available on IP systems.
