> For the complete documentation index, see [llms.txt](https://docs.gantner.com/gantner-integration-engine/0HdohY5UKx8UzclrPKsy/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.gantner.com/gantner-integration-engine/0HdohY5UKx8UzclrPKsy/connectors/gallagher-relaxx/architecture-of-gallagher-relaxx-connector.md).
# Architecture of Gallagher-Relaxx connector
## Process flow
### Data synchronization flow
* **From Gallagher to eLoxx Relaxx:**\
Gallagher Command Centre sends locker user information and locker assignments to eLoxx Relaxx via GIE.
* **From eLoxx Relaxx to Gallagher:**\
eLoxx Relaxx sends locker details and status updates back to the Gallagher Command Centre through GIE.
### User credential process flow
#### Using an access card
* The user presents an access card (MIFARE, DESFire) via the **GT7 3xxx device**.
* Once verified, the command is passed on to the **Gantner locker** hardware.
* The locker hardware communicates with eLoxx Relaxx, updating user activity.
#### Using Gallagher mobile connect
* The user presents a mobile credential via the **Gallagher Mobile Connect** app.
* The mobile phone communicates with the **Gallagher Mobile Reader**.
* The **Gallagher Controller 6000** receives and validates the credential.
* The controller forwards the command to the **GT7 3xxx device**, which displays available lockers.
* Once verified, the command is sent to the **Gantner locker** hardware, which then updates user activity in **eLoxx Relaxx**.
#### **Using RFID credential read options**
* **Mifare Classic**\
Supported as a dropdown option in Gantner NET.Lock hardware. Requires Mifare Key A and Key B to be available.
* **Mifare DESFire – Gallagher Encoding (Non-Secure, Pre-2020)**\
Uses the older Gallagher encoding method without encryption; applicable to **pre-2020 configurations**.
* **Mifare DESFire – Gallagher Encoding (Site-Specific Secure)**\
Secure encoding method dependent on site-specific encryption keys being available.
* **Mifare DESFire – Gallagher Non-Diversified DESFire Object**\
Recommended configuration for secure and consistent credential reading.
* **Mifare DESFire UID-CSN**\
Used when other Cardholder Card Number read options are unavailable.
{% hint style="warning" %}
This method references a **different card unique number** in Gantner (Mifare UID) than in Gallagher Command Centre (Cardholder Card Number).
{% endhint %}
* **Gantner NET.Lock Hardware (HID Omnikey Secure Element)**\
Includes models featuring the HID Omnikey Secure Element reader module, supporting simultaneous RFID credential reading for Mifare and HID technologies (iCLASS/SE, SEOS, PACS, and HID Mobile Credentials).
## Components
| Component | Description |
| :-----------------------: | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Gallagher mobile connect | The **Gallagher Mobile Connect** feature enables you to locate and access available lockers using the GT7 terminal. This functionality requires a **GT7.3xxx terminal** equipped with the **RS232** peripheral interface option for Mobile Credential integration. |
| Gallagher mobile reader | A hardware device that can scan and authenticate user mobile credentials. |
| Gallagher controller 6000 | A controller that interfaces with Gallagher readers and **GT7 3xxx** devices. |
| GT7 3xxx device | A Gantner access terminal that communicates with the Gallagher controller 6000. |
| Gantner locker | The physical lockers that are managed, controlled, or monitored by eLoxx Relaxx by admin users. |
| eLock Relaxx system | Gantner’s locker management system, used to manage and control Gantner networked lockers. |
## Supported devices
### Locker locks
* GAT NET.Lock 7000
* GAT NET.Lock 7020
* GAT NET.Lock 7020 P
* GAT NET.Lock 7020 USB
* GAT NET.Lock 7020 USB P
* GAT NET.Lock 70x0 V2.9 (1.1.0 for the USB module)
* GAT SMART.Lock 7001
### Controller units
* GAT NET.Controller M 70x0 V2.2 – (Check data carrier settings)
* GAT NET.Controller S 70x0 F/ISO/B V2.4 – (Check data carrier settings)
* GAT SMART.Controller S 7020
---
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