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Published: August 24, 2026 | Last Technically Reviewed: August 24, 2026
Magyar Telekom IPTV Data Center - Real-World Deployment Case
- 1. Quick Answer
- 2. Introduction
- 3. Project Snapshot
- 4. The Design Was Complete on Paper, but the Site Still Had to Be Verified
- 5. The Unexpected Measurement Was Approximately 25 Meters
- 6. The Load Made the Distance Important
- 7. Why a Long High-Current DC Run Raised a Design Concern
- 8. We Changed the Power Feed Before Installation
- 9. Why Finding It During the Survey Mattered
- 10. The Engineering Lesson
- 11. Want the Complete Magyar Telekom IPTV Data Center Case?
- 12. Frequently asked questions (FAQs)
- 13. More Real-World Network Deployment Experience
- 14. Verification Note
Quick Answer
In this Magyar Telekom IPTV data-center project, the original -48V power-feed design had to be revised after the on-site survey showed an approximately 25-meter route between the existing DC source and the new PDF cabinet. With nine equipment racks designed for a maximum total load of 27kW, the calculated maximum current reached 562.5A. At that load, the longer conductor route made voltage drop a design concern rather than a minor installation detail. After reviewing the actual site conditions with the customer, the approved project solution used two 120 mm -48V input power cables. The key result was that the risk was identified before equipment installation, not after a power failure occurred.
Introduction
Before installation began, the IPTV front-end equipment-room design had already gone through rack-layout, equipment-interconnection and power-distribution planning. Most of those assumptions survived the on-site survey. One did not.
When we reached the Budapest equipment room, we measured approximately 25 meters between the existing -48V DC power source and the location planned for the new PDF power-distribution cabinet. That route was substantially longer than the approximately 10-meter distance that had been commonly assumed during the original planning for this deployment.
That single measurement forced us to revisit the power-feed design before the equipment arrived.
Why did 25 meters matter so much? Because the planned system could draw as much as 562.5 A at the calculated maximum design load. At that current level, conductor length could no longer be treated as a minor installation detail.
Project Snapshot
| Item | Project Fact |
| Customer | Magyar Telekom |
| Project | IPTV Front-End Data Center |
| Location | Budapest, Hungary |
| Initial IPTV planning capacity | 200,000 users |
| Equipment racks | 9 |
| Maximum design load per rack | 3,000 W |
| Total maximum design load | 27,000 W |
| DC system | -48 V |
| Calculated maximum current | 562.5 A |
| Measured source-to-PDF distance | ~25 m |
| Approved revised input feed | Two 120 mm -48V input power cables |
All values above are historical, project-specific planning, measured or calculated values. They should not be used as universal telecom or data-center power-sizing standards.
Magyar Telekom started the IPTV project in 2011, with the first front-end location planned in Budapest. The initial design targeted approximately 200,000 IPTV users, 300 channels, 50,000 movies and 100,000 TV episodes. The front-end site included servers, storage systems, switches, firewalls and edge routing equipment.
Those service requirements drove the equipment and rack plan. But the issue discussed here was much more physical: whether the planned -48V power feed still made sense after the real cable route was measured.
The Design Was Complete on Paper, but the Site Still Had to Be Verified
Before the site survey, we had already produced the major front-end design documents, including the rack layout, equipment-interconnection drawings and power-distribution information. The design also placed a dedicated PDF cabinet near the equipment racks specifically to reduce the length of the individual -48V feeds from the PDF to each equipment rack.
That did not eliminate the need to verify the room itself.
The site survey checked the actual cabinet locations, cable-routing environment, ODF position, existing -48V power location, available connection terminals, cable lengths and physical conditions around the planned installation area. The survey template specifically required the team to record the specification, quantity and length of the -48V power cables from the existing power source to the new PDF cabinet.
That distinction matters.
A drawing may show two cabinets that appear relatively close together. The actual cable does not travel through the drawing. It follows the available tray, under-floor route, structural constraints and connection points in the real equipment room.
For this project, that measurement changed the power design.
The Unexpected Measurement Was Approximately 25 Meters
Most of the survey proceeded normally. The significant exception was the distance between the existing -48V source and the proposed PDF cabinet.
The measured route was approximately:
The original project record describes this as substantially longer than the roughly 10-meter distance commonly expected in the planning context for this deployment.
That should not be misread as a universal rule that telecom -48V cables must always be shorter than 10 meters.
It was a project-specific comparison.
The important fact was that the actual route was much longer than the distance assumed when the original power arrangement was being considered. Once that became known, the load and conductor requirement had to be reviewed again.
The 25-meter figure was therefore not just a site-survey note. It became a design input.
The Load Made the Distance Important
The front-end design contained nine equipment racks.
The maximum design load assigned to each rack was 3,000 W, producing a total maximum design load of:
9 3,000 W = 27,000 W
The DC supply was -48 V.
Using the project design values, the maximum current was calculated as:
27,000 W 48 V = 562.5 A
The original survey record preserves this exact calculation and connects it directly to the power-feed redesign.
Project Power Snapshot
| Power Input | Project Value |
| Equipment racks | 9 |
| Maximum design load per rack | 3,000 W |
| Total maximum design load | 27,000 W |
| DC system | -48 V |
| Calculated maximum current | 562.5 A |
| Measured source-to-PDF distance | ~25 m |
These are historical, project-specific design values and are not universal telecom or data-center power-sizing recommendations.
This combination-high calculated current and a longer-than-expected conductor route-is what made the survey result important.
The problem was not simply "25 meters is long."
The problem was:
Why a Long High-Current DC Run Raised a Design Concern
The electrical logic needed for this case is straightforward.
All else being equal:
Longer conductor greater conductor resistance greater voltage drop
At small loads, an increase in cable length may be easier to accommodate. At the calculated maximum current of 562.5 A, however, the supply route could not be treated like an ordinary low-current equipment cable.
The engineering review therefore had to consider the relationship among:
load current;
actual conductor length;
conductor cross-sectional area;
acceptable voltage drop;
and safe power delivery to the PDF.
The original project record specifically states that the team considered the voltage-drop effect of the 25-meter route when revising the input power-cable design.
The surviving project documentation does not preserve the exact calculated voltage drop, conductor resistance, temperature rise or cable ampacity margin used in that review.
Those values should not be reconstructed and presented as if they were original field data.
What the source does establish is the causal chain:
**25 m measured route
27 kW maximum design load
562.5 A calculated maximum current
voltage-drop consideration
revised power feed**
We Changed the Power Feed Before Installation
Once the real cable distance and maximum design current were reviewed, we discussed the revised arrangement with the customer.
For this specific project, the approved solution was:
The project record explicitly ties this decision to the 27 kW maximum design load, 562.5 A calculated current and 25-meter source-to-PDF distance.
This should not be generalized into a sizing formula.
It would be incorrect to say:
The defensible statement is:
The cable size was the outcome of the actual project conditions, not a universal reference design.
Why Finding It During the Survey Mattered
The timing of the discovery is a major part of the value of this case.
The survey took place before equipment production, preparation and installation. After the survey report was reviewed and approved by both sides, it was uploaded into the project system and used to guide equipment production and preparation.
That meant the revised power-feed requirement could be incorporated before the equipment arrived.
Had the distance not been verified, potential project risks could have included:
an inadequately sized input feed;
redesign after delivery;
rerouting or replacing installed cabling;
installation delay;
additional on-site construction.
Those are potential risks, not failures recorded in the project.
There was no documented equipment burn-out, service interruption or power incident.
The design risk was identified before it became an operating problem.
The Engineering Lesson
The main lesson from this project is very specific:
The BOM and rack plan may be technically correct while the physical deployment design still contains an incorrect assumption.
In this case, the equipment requirements had already been calculated. The racks had been planned. The PDF cabinet had been included. The missing piece was the actual distance between the existing -48V source and that PDF.
One field measurement changed the input-power design.
That is why equipment selection must eventually be checked against the real installation environment: available power, physical space, cable routes, uplink paths, distance and environmental conditions.
The most valuable result of this site survey was not discovering a failure. It was identifying a physical design risk early enough to change the power feed before the equipment arrived.
Want the Complete Magyar Telekom IPTV Data Center Case?
This article extracts only one engineering decision from the broader Magyar Telekom IPTV project: the redesign of the -48V power feed after a 25-meter source-to-PDF route was measured on site.
The complete project covered much more, including IPTV capacity planning, storage sizing, server architecture, switching, routing, firewalls, rack planning, hardware installation, software deployment, system integration, acceptance and trial operation. The original material follows the project from service requirements through design, survey, installation and integration.
Download the complete Magyar Telekom IPTV Data Center white paper to review the full project lifecycle and the other engineering decisions behind the deployment.
Frequently asked questions (FAQs)
Why did a 25-meter -48V power run require a redesign in this project?
Because the cable distance had to be considered together with the load. The project had nine equipment racks with a maximum design load of 3,000 W each, for 27kW total. At -48V, the project calculated a maximum current of 562.5A. The approximately 25-meter route therefore raised a voltage-drop consideration that required the input feed to be reviewed.
Was 25 meters itself automatically too long for a -48V telecom power cable?
No. The approximately 25-meter measurement was significant in the context of this specific project's load and original design assumptions.
The project document compares it with an approximately 10-meter distance commonly expected in that deployment, but this should not be interpreted as a universal rule that all -48V telecom cables must remain below 10 meters.
What was the total power load used in the project calculation?
The project planned nine equipment racks with a maximum design load of 3,000 W per rack, producing a total maximum design load of:
9 × 3,000 W = 27,000 W.
These were design values, not measured operating consumption.
How was the 562.5A current value calculated?
The project used the maximum design load and nominal -48V DC supply:
27,000 W ÷ 48 V = 562.5 A
Therefore, 562.5 A was a calculated maximum current, not a field-measured current.
Why does cable length matter more when DC current is high?
All else being equal, a longer conductor has greater electrical resistance, which can increase voltage drop. When the planned current is high, conductor length and cross-sectional area therefore become important parts of the power-feed design.
In this project, the combination of approximately 25 meters and 562.5A calculated maximum current triggered the design review.
What power-feed solution was approved for the project?
After reviewing the 27kW design load, 562.5A calculated maximum current, approximately 25-meter route and voltage-drop consideration with the customer, the project approved two 120 mm² -48V input power cables for the new PDF cabinet.
This was a project-specific solution, not a universal cable-sizing recommendation.
Does this mean two 120 mm² cables are correct for every 27kW -48V installation?
No. Cable sizing depends on the actual system design, current, conductor length, allowable voltage drop, installation method, safety requirements and other engineering conditions.
The historical source supports two 120 mm² cables only as the approved solution for this specific Magyar Telekom project.
Did the project experience a power outage or equipment failure because of the original design?
No documented outage, equipment damage or power failure is recorded in the source.
The issue was discovered during the site survey before installation. The value of the survey was therefore preventive: it exposed a physical design risk before it became an operational problem.
Why was the on-site survey necessary if the rack and power design had already been completed?
Because design drawings cannot fully establish the real cable route.
The project survey verified cabinet positions, ODF locations, the existing -48V power source, terminals, cable routing conditions and actual cable lengths. The survey specifically required the source-to-PDF power-cable length to be recorded.
In this case, that field measurement changed the electrical design.
What is the main engineering lesson from this data-center power case?
The main lesson is:
A rack power calculation is not complete until the actual power-source location and cable route have been verified on site.
A BOM, rack layout and equipment plan may all be correct while a physical deployment assumption is still wrong.
In this project, the most valuable outcome was not repairing a power failure. It was identifying the design risk early enough to change the power feed before the equipment arrived.
More Real-World Network Deployment Experience
Large carrier and data-center projects operate at a very different scale from a hotel, office, retail store or small-to-mid-sized business network. The Magyar Telekom power-feed design should therefore not be copied directly into a modern enterprise deployment.
The transferable engineering discipline is to verify the real environment before finalizing the equipment plan.
In current network projects, that can include the existing network, equipment requirements, switch and AP selection, PoE or power requirements, uplink capacity, optical compatibility, cabling, BOM consistency and future expansion.
Modern data-center projects may also use very different equipment from this historical IPTV deployment. When selecting current data center switches, interface requirements, redundancy, uplink capacity, optics, rack constraints and power requirements should be reviewed together rather than treating the switch as an isolated SKU.
You can also explore our real-world network deployment case studies to see how design, migration and troubleshooting issues were handled in other projects. For a different environment, a topology, equipment list or current BOM can be reviewed on a project-specific basis.
Project requirements
The project began in 2011. The first IPTV front-end site was planned in Budapest for approximately 200,000 IPTV users, 300 channels, 50,000 movies and 100,000 television episodes.
Front-end equipment scope
The project front end included servers, storage, firewalls, aggregation switches and edge routers.
Rack and power architecture
The design used nine equipment racks plus a PDF cabinet, with the PDF intended to reduce individual rack -48V power-cable lengths.
Site-survey scope
The survey verified physical installation conditions, including cabinet locations, ODFs, existing -48V power, terminals, cable specifications, quantities and actual cable lengths.
25-meter finding and power redesign
The source-to-PDF route was approximately 25 m. The nine racks were designed at 3,000 W maximum each, totaling 27,000 W; the project calculated 562.5 A at 48 V. After considering voltage drop, the agreed input arrangement was two 120 mm -48V power cables.
Timing of the correction
The approved survey report was uploaded into the system and used to guide subsequent equipment production and preparation.
Project-Specific Number List
| Number | Classification | Meaning |
| 2011 | Historical project fact | Year the Magyar Telekom IPTV project began |
| 200,000 users | Historical requirement | Initial IPTV user planning capacity |
| 300 channels | Historical requirement | Initial channel requirement |
| 50,000 movies | Historical requirement | Planned movie-content scale |
| 100,000 TV episodes | Historical requirement | Planned TV-series content scale |
| 9 racks | Design value | Number of equipment racks in the front-end site |
| 3,000 W/rack | Design value | Maximum design load assigned to each equipment rack |
| 27,000 W | Design value | Total maximum design load |
| -48 V | Design value | Data-center DC supply |
| 562.5 A | Calculated value | Maximum current from 27,000 W 48 V |
| ~25 m | Measured field value | Existing -48V source to planned PDF cabinet route |
| ~10 m | Historical project-context assumption | Distance commonly expected in the original deployment planning; not a universal telecom standard |
| Two 120 mm -48V cables | Approved project solution | Revised PDF input power-feed design |
Verification Note
All project-specific numerical claims in this article are supported by the supplied Magyar Telekom project material. No exact voltage-drop value, conductor resistance, temperature rise, ampacity margin, failure event, outage or equipment damage has been added because those details are not recorded in the source.
The current data center switches collection is included only as a present-day product-category reference. The article does not imply that current products in that collection were used in the 2011 Magyar Telekom deployment.