Jablotron RFID Cards & the Alarm-Access Crossover

Jablotron and Combined Alarm-Access Systems

Jablotron Alarms a.s., headquartered in Jablonec nad Nisou in the Czech Republic, occupies a distinct position in European security: it produces integrated platforms that combine intruder alarm and RFID-based access control in a single system. The flagship JABLOTRON 100 series is widely deployed across Central and Eastern Europe in commercial offices, small industrial premises, retail sites and residential developments — wherever a single credential for both arming the alarm and unlocking doors is a practical advantage.

That integration makes Jablotron installations different from pure access-control deployments using systems such as Gallagher or Lenel. In a Jablotron environment, the card or fob presented at the reader both authenticates the user's access rights and communicates with the alarm panel. Both functions run on the same credential. The operational implication for facilities managers is straightforward: losing a card or onboarding a new employee requires a Jablotron-format credential, not a generic 26-bit proximity card. That format specificity is exactly what creates the supply gap this article addresses.

The 64-Bit BiPhase Jablotron Format

At the technical level, a Jablotron RFID card is a 125 kHz low-frequency credential that encodes its data using BiPhase modulation — a line-coding method in which each bit is represented by a mid-bit transition, giving reliable read performance at the short ranges typical of door-reader installations. The payload is 64 bits long and carries a decimal card identification number accompanied by a checksum sequence that the reader uses to validate the transmission. The structure is proprietary: it is not the open 26-bit Wiegand H10301 standard used by the majority of the 125 kHz LF proximity card market, nor is it based on any of the common EM4100 or HID Prox encodings.

The 64-bit BiPhase layout means the ID space available to a Jablotron installation is considerably larger than a conventional 26-bit Wiegand deployment can offer, which is part of why the format was designed for stand-alone integrated systems rather than Wiegand-controlled access panels. Because the format is both documented and operates on standard 125 kHz physics, it is reproduced on T5577, EM4305, and Q5 programmable blank substrates — the same multi-protocol emulation chips used to encode many other enterprise-proprietary formats that depart from the 26-bit mainstream. The chip is programmed to present the correct modulation, bit length, ID value and checksum so the reader receives data identical to that from an OEM-issued Jablotron credential.

Why Alarm-Access Credentials Get Overlooked

Most access-control card suppliers concentrate on stand-alone access systems from brands such as HID Global, Lenel, or Gallagher — platforms with large installed bases and readily available credential ranges. Alarm-integrated formats from regional European manufacturers occupy a different procurement channel: they are typically supplied through the alarm system integrator or distributor, not through general access-control card trade suppliers. When the original integrator is no longer available, or when a building changes hands and the card supply contract lapses, the facilities manager discovers that replacement Jablotron credentials are not straightforward to source online.

The scarcity is compounded by format specificity. A facilities manager running a Gallagher CardaxFT system can often reach a Gallagher compatible proximity card supplier with a few targeted searches. Jablotron installations are proportionately far less common outside Central Europe, and the BiPhase 64-bit format is not one that general-purpose card suppliers bother to tool up for. The result is that buyers searching for Jablotron RFID cards frequently find only original-equipment routes — expensive, slow, and dependent on holding an active integrator relationship — or nothing at all. Understanding how to identify your access card format is the first step to breaking out of that dependency.

Producing a Compatible Jablotron Card

Producing a credential compatible with Jablotron readers requires correctly programming the T5577 or EM4305 blank to output BiPhase modulation at 125 kHz with the Jablotron 64-bit data structure. The card ID — the decimal number enrolled in the Jablotron panel — must be encoded accurately, and the checksum must be computed and written correctly to match the reader's validation logic. A credential that passes on frequency and modulation but presents a malformed checksum will fail; reader tolerance for transmission errors in integrated alarm-access systems is lower than in pure access-control installations, because the same signal is processed by both the door controller and the alarm panel.

The practical workflow for an end customer ordering a compatible Jablotron credential is to supply the decimal card ID from their existing card or from the Jablotron panel's enrolled-user record. Unlike formats that require reading the card in the field, the Jablotron format ID is often visible directly in the panel software, which simplifies re-ordering considerably. Multiple credentials — cards and key fobs — can be produced to the same ID, or to sequential IDs to be enrolled as additional users. For a broader comparison of how this process differs across credential tiers, the guide on compatible vs genuine access cards explains the distinction between ready-encoded LF credentials and secured smart card platforms.

The T5577-based substrate used for Jablotron compatibles is the same multi-protocol chip that underpins compatible credentials for many other specialist formats across the enterprise-proprietary landscape — formats such as the Lenel 42-bit credential, the Avigilon 56-bit card, and Software House CCOTZ 37-bit cards. The T5577 programmable blank is purpose-built for this role: it stores the correct configuration block for each target format so the credential is transparent to the reader, which sees nothing other than a correctly-formatted Jablotron transmission.

Ordering a Compatible Jablotron Credential

When placing an order for Jablotron-compatible cards or fobs, the key information required is the decimal card ID — or the range of IDs to be produced — as enrolled or to be enrolled in the JABLOTRON 100 panel. Card body format (ISO CR80 card or key fob) and quantity complete the specification. Standard card bodies conform to ISO 7810 ID-1 dimensions. For organisations managing larger sites with mixed credential requirements, it is worth noting that the Jablotron format is supplied as a discrete SKU — it is not a sub-configuration of a generic proximity card order — because the T5577 must be programmed specifically to the BiPhase Jablotron data structure rather than a more common format.

Security ID Systems holds the Jablotron format in production and can fulfil orders for replacement credentials, additional user cards, and fobs compatible with JABLOTRON 100 installations. Lead times and order minimums are available on the product page. For facilities managers running other specialist office building and commercial tenant access credential requirements — whether a European format like the Inner Range Sifer card or a North American proprietary format such as the ADT 31-bit proximity card — the same principle applies: supply the correct card ID data and the format is produced to specification.

Security ID Systems is an independent manufacturer and supplier of compatible access-control credentials and is not affiliated with, authorized by, or endorsed by Jablotron Alarms a.s.