Case Study: Business Internet with Backup for a Manufacturing Company in Brno

An outage of business internet in Brno in the middle of a production shift is not just an operational inconvenience — for a company dependent on cloud ERP, production control systems, and VoIP telephony, every hour without connectivity means direct financial losses and the risk of missing deadlines with customers. New Telekom s.r.o. implemented for a medium-sized manufacturing company in Brno a complete business internet with backup infrastructure: primary FTTO fiber connection 500 Mbit/s symmetrical with 99.9% SLA and automatic backup connectivity via LTE-A Pro with failover within 10 seconds — without manual intervention, without critical system outages.

Why is backup internet for companies in Brno more important than anywhere else?

Brno is the second largest industrial and technology center in the Czech Republic — home to engineering plants, electrical equipment manufacturers, technology startups, and regional branches of multinational corporations. Dense industrial development in areas such as Brno — Líšeň, Brno — Slatina, Brno — Černovice, or around the Brno Exhibition Centre brings specific risks for fiber infrastructure: extensive excavation work during industrial renovations, cable runs in overloaded technical routes, and greater distances from backbone fiber nodes than in the center of Prague. The customer — a manufacturer of industrial electronics with 65 employees and a plant in the Brno — Slatina industrial zone — experienced three outages of its primary internet connection in the previous twelve months, each lasting 2–6 hours. Each outage meant interrupted access to the cloud ERP system (Microsoft Dynamics 365), a non-functional VoIP PBX, and the inability of the sales team to communicate with customers. Estimated total losses from outages: over CZK 180,000 per year — and that only in direct costs, without including the reputational impact on customer relationships. The customer's requirements were straightforward: guaranteed fiber connection with SLA, automatic backup activating without human intervention during primary link outage, and unified monitoring of both paths under a single contract.

How did New Telekom design the solution for business internet with backup in Brno?

Location survey in the Brno — Slatina industrial zone

The first step was a location survey at the customer's premises in Brno — Slatina. The New Telekom technician team mapped available cable routes in the industrial zone, verified the passability of existing utility conduits, and identified the nearest distribution node of the New Telekom partner network in Brno — at a distance of 1,140 meters from the customer's building. Simultaneously, mobile network coverage measurement was performed on the premises to verify whether the location in the industrial area of Brno achieves sufficient LTE signal quality for the backup connection. Result: signal strength -78 dBm in band B3 (1800 MHz) — sufficient for an aggregated LTE-A Pro connection with real throughput exceeding 150 Mbit/s.

Designed architecture: primary fiber + automatic LTE backup

New Telekom designed a two-layer architecture precisely matching the customer's requirements: Primary layer — FTTO 500 Mbit/s: Dedicated OS2 Single-Mode fiber pair from the New Telekom partner network distribution node in Brno to the customer's premises in Brno — Slatina — total route length 1,140 meters, routed through existing technical conduits of the industrial zone. Guaranteed symmetrical capacity 500 Mbit/s, 99.9% SLA availability, outage response time within 15 minutes, MTTR within 4 hours. Backup layer — LTE-A Pro via New Telekom eSIM: Backup mobile connection on the Juniper NFX250 router with New Telekom eSIM card — automatic activation during primary fiber connection outage. Real throughput of the backup connection: 100–180 Mbit/s depending on current network load in the Brno — Slatina area. Failover to backup: within 10 seconds without manual intervention. Automatic failback to primary fiber after restoration. Key decision in the design: the backup LTE connection is configured as an active backup with full SD-WAN orchestration — not just an emergency fallback. The Juniper NFX250 router continuously measures the quality of both paths and, upon detection of primary link degradation (increased latency, packet loss), switches critical traffic to backup even before complete failure. The customer in Brno thus does not experience an outage even during gradual degradation of the fiber link — switching occurs before the degradation affects the application layer.

What was physically implemented in Brno?

FTTO fiber connection in Brno — Slatina

• 1,140 meters of OS2 Single-Mode 4-fiber optical cable on the route New Telekom Brno distribution node — customer premises in Brno — Slatina, routed through existing utility conduits of the industrial zone and vertical building shafts
• Fiber route terminated with LC/APC connectors on a 12-port optical patch panel in the customer's data rack
• Measured total route attenuation: 3.2 dB — below the normative limit for OS2 class (3.5 dB/km including splices)
• Certification measurement performed with EXFO FTB-720 instrument with protocol handover to customer according to ČSN EN 50346

Active equipment

• Juniper NFX250 — SD-WAN CPE router for orchestration of primary fiber link and backup LTE connection; hardware support for BGP, IPv4/IPv6 dual-stack, QoS DiffServ with VoIP traffic prioritization (EF DSCP), stateful firewall; slot for New Telekom eSIM card for backup LTE-A Pro connection
• Cisco Catalyst 9200-24T — access switch with 24× GbE ports and 4× 1GbE SFP uplinks for connecting the customer's corporate network; separate VLAN for VoIP phones, office workstations, and industrial terminals
• Fortinet FortiGate 80F — NGFW firewall with IPS, application control, and SSL/TLS inspection for protecting the customer's corporate network; throughput capacity 10 Gbit/s — sufficient for both primary and backup connections without performance limitation
• APC Smart-UPS 1000VA — backup power for all active equipment for 30 minutes during power outage on the premises

Structured cabling in Brno offices

On the office floor of the manufacturing plant in Brno, New Telekom performed a complete renewal of structured cabling:

• 520 meters of Cat 6A S/FTP cable for data outlets and VoIP phone connections
• 2× Cat 6A patch panel 24-port with keystone connectors
• 28 data outlets with dual RJ45 Cat 6A ports
• Certification of all cabling with Fluke Networks DSX2-8000 instrument according to ČSN EN 50173-2, class EA

How does automatic failover work in practice?

Backup connectivity only works reliably if switching actually occurs automatically and sufficiently quickly. On paper it sounds simple — in practice, configuration matters. New Telekom configured the SD-WAN logic on the Juniper NFX250 router with the following parameters for the customer in Brno:

• Health check: continuous ICMP ping to two checkpoints ( New Telekom Brno distribution node and a public DNS resolver) with 3 second interval and threshold of 3 consecutive failures = outage detection within 9 seconds
• Failover trigger: switch to backup LTE connection upon primary link failure or upon packet loss on primary link above 2% for 15 seconds — captures even degradation without complete failure
• Traffic prioritization on backup: when LTE backup is active, QoS policies limit low-priority flows (software updates, logs) and all backup capacity is reserved for VoIP (Microsoft Teams Calling, SIP Trunk), ERP traffic (Microsoft Dynamics 365), and remote access (VPN)
• Failback: automatic switch back to primary fiber 60 seconds after link restoration — sufficient delay to verify stable restoration, without premature switching back

Testing of failover scenarios before handover

Before formal project handover to the customer in Brno, the New Telekom team performed a series of failover tests:

• Physical disconnection of fiber cable at patch panel — switch to LTE backup: 7 seconds
• Simulation of packet loss above threshold (injection of 5% loss on primary link) — switch to backup: 18 seconds
• Switch back to restored primary link: 63 seconds after restoration (automatic)
• Power outage — restart of active equipment from UPS, restoration of primary connection: 45 seconds

All results were documented and provided to the customer as part of the handover protocol.

What results did the customer in Brno achieve?

After six months of operation of the business internet with backup in Brno, the infrastructure achieved the following results: The achieved availability of 99.97% exceeded the contractually guaranteed 99.9% — during six months, two incidents occurred in which traffic was automatically switched to LTE backup (one primary fiber outage lasting 22 minutes, one outage lasting 8 minutes). In both cases, the customer experienced the switchover as a brief connectivity hesitation (7 and 9 seconds) without any impact on ERP or VoIP systems.

Why does backup internet for companies in Brno have different specifics than in Prague?

The technical solution of business internet with backup in Brno shares principles with Prague projects, but has its local specifics: Last mile distances are greater. Industrial zones in Brno — Slatina, Líšeň, Černovice, Modřice, or Tuřany near the airport — are more distant from central backbone nodes than the office districts of Prague 4 or Prague 5. A longer fiber route means higher attenuation and greater sensitivity to outages caused by excavations. Backup LTE connection therefore has even higher operational value in Brno compared to the dense development of central Prague. Mobile coverage in Brno's industrial zones is good, but not uniform everywhere. Large hall buildings made of precast concrete or with steel cladding can attenuate LTE signal. A location survey including indoor coverage measurement is essential for Brno — verifying coverage from the operator's map data alone is insufficient. New Telekom's partner network covers all of Brno. New Telekom's own backbone network is primarily in Prague — in Brno and other regional centers (Ostrava, Plzeň, Olomouc, Hradec Králové) we provide business internet through verified regional partners with the same SLA guarantees and the same 24/7 New Telekom NOC monitoring. The customer in Brno has one point of contact, one contract, and one invoice.

Frequently asked questions about business internet with backup in Brno

How quickly does backup LTE internet activate during fiber outage in Brno?

Switchover to the backup LTE-A Pro connection occurs automatically within 10 seconds of detecting a primary fiber link outage — without needing to call an operator or manually configure the network. The SD-WAN logic on the Juniper NFX250 router continuously monitors primary connection quality and switches traffic to backup immediately upon detection of outage or significant degradation. After restoration of the primary fiber link, automatic failback occurs.

What is the real speed of backup LTE internet for companies in Brno?

In the industrial zones of Brno (Slatina, Líšeň, Černovice, Modřice), the real throughput of the LTE-A Pro backup connection ranges between 80–200 Mbit/s depending on the specific location, distance from the base station, and current load on the mobile network. For critical business applications — ERP, VoIP, remote access — this capacity is fully sufficient. For customers with extremely high backup capacity requirements, New Telekom offers a backup connection using 5G technology in locations with available coverage in Brno.

Does New Telekom offer business internet with backup in other locations in Brno?

Yes. New Telekom implements business internet with backup throughout Brno — Brno — center, Brno — Královo Pole, Brno — Židenice, Brno — Slatina, Brno — Líšeň, Brno — Černovice, Brno — Modřice, the area around the Brno Exhibition Centre, and industrial zones along D1 and D2 highways. For each location, we perform a free location survey including verification of fiber route availability and measurement of LTE signal quality inside the building.

Is it possible to have business internet with backup in Brno under a single contract with New Telekom?

Yes — and that is exactly how customers in Brno require it. The primary fiber connection, backup LTE-A Pro connection, 24/7 New Telekom NOC monitoring of both paths, and technical support are all part of a single contract with New Telekom. The customer does not deal with a separate contract with a mobile operator for backup nor with coordination between two different suppliers during an outage.

What happens if both fiber and LTE backup fail simultaneously?

A simultaneous outage of both paths is extremely unlikely — the fiber link and LTE backup are physically completely independent transmission paths. If such a scenario were nevertheless to occur (for example, during a prolonged power outage exceeding UPS capacity), the New Telekom NOC is notified automatically and escalates resolution to both suppliers simultaneously. For customers with absolute availability requirements, New Telekom offers a third backup layer — a second independent LTE connection via a different mobile operator.

Conclusion

Business internet with backup in Brno is not a complicated project — but it requires correct configuration of SD-WAN failover logic, a location survey including LTE signal measurement inside the building, and an operator that takes responsibility for the entire solution under a single contract. The result for the customer in Brno — Slatina speaks for itself: zero unplanned outages in six months of operation compared to three outages in the previous year, automatic failover within 10 seconds without manual intervention, and measured availability of 99.97% — exceeding the contractually guaranteed 99.9%. If your company is located in Brno or the South Moravian Region and you are looking for guaranteed business internet with automatic backup and unified management under a single contract, contact the New Telekom team via the contact page or verify availability at your address on the coverage page. The location survey including LTE signal measurement inside the building is free of charge.

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This case study was prepared by the expert team of New Telekom s.r.o. Technical parameters correspond to the state on the project handover date and measured values after six months of operation. The customer's industry and number of employees are disclosed with customer consent; the exact address of the premises is not disclosed for commercial reasons. Information corresponds to the technological state as of May 2026.

Technologies and standards used

• Juniper NFX250 — SD-WAN CPE router with BGP, IPv6, QoS DiffServ, eSIM slot
• Cisco Catalyst 9200-24T — access switch
• Fortinet FortiGate 80F — NGFW firewall with IPS and SSL/TLS inspection
• OS2 Single-Mode — FTTO fiber connection cable Brno — Slatina
• EXFO FTB-720 — OTDR certification of fiber route
• Cat 6A S/FTP — structured cabling according to ČSN EN 50173-2, class EA
• Fluke Networks DSX2-8000 — structured cabling certification
• 3GPP LTE-A Pro — backup mobile connectivity bands B3/B7
• GSMA SGP.22 — Remote SIM Provisioning, New Telekom eSIM/eUICC
• ČSN EN 50346 — fiber route certification
• NIX.CZ — Neutral Internet eXchange Prague, New Telekom direct peering
• SLA, MTTR — guaranteed availability and repair parameters