HHT Technical Overview
The Fidelity HHT application allows users to look up Product details and complete Stock Transactions on the terminal without having to be near a back-office PC running Total Control Premier. The terminals can connect to the network via WiFi, or via Ethernet when docked in the charging cradle with the Ethernet module attached. There are two main elements to the process:
- Product and Stock Transaction files sent to and from Total Control Premier
- A real-time connection to the Total Control Premier SQL Server database
Both elements employ a service called “MISCommunicator”, which handles all communication between the HHT application and Total Control Premier.
Data Source
A System DSN is required for the real-time connection to the Total Control Premier database. This is typically called “FidelityHHT” and uses SQL credentials to connect to the database. If there are multiple Total Control Premier databases in use, a DNS will need to be created for each of these databases and named accordingly.
MISCommunicator
This service is typically installed on the application server and handles requests from the HHT application via communications over port 8000 or 9000. More recent versions of the application communicate on port 9000 with an additional Encryption option to prevent unauthorised communication, and we’ll advise you on which port we’re using when installing the HHT(s). The server or PC on which MISCommunicator is installed must be allowed inbound and outbound communications on TCP port 8000 or 9000 as appropriate. MISCommunicator uses the Data Source as configured above for the real-time connection, and a shared folder as described below to pick up and deliver the Product and Stock Transaction files for when the HHT requests them.
For MISCommunicator to run as a Service and write log files, it must be allowed to run with elevated privileges.
Shared Folder
The HHT application directs MISCommunicator to a specified folder to pick up and deliver the Product and Stock Transaction files. The HHT application itself does not see the shared folder, as MISCommunicator acts on the terminal's behalf, so when the HHT application communicates it just expects that folder to be available to the MISCommunicator application without any specific requirements. We therefore recommend that a shared folder with full Read/Write permissions is created and made accessible to Everyone.
If there are multiple Total Control Premier databases in use, a shared folder will need to be created for each of these databases.
Real-Time Connection
The HHT application uses the Data Source to connect to the Total Control Premier database. The terminal will need to be connected to the network at the time so will either need to be connected to a WiFi access point or will need to be docked in the charging cradle with the Ethernet module attached.
Total Control Premier
Total Control Premier writes Product files and collects the Stock Transaction files from the shared folder, and so the shared folder needs to be accessible from any PC running Total Control Premier.
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