047/2026: T7 Release 15.0: Important information for production start

1. Introduction 

Deutsche Börse Group will launch Release 15.0 of the T7 trading system on Monday, 9 November 2026.  

The support window for T7 Release 15.0 will take place on Saturday, 7 November 2026 between 15:00 and 18:00 CET. Connectivity testing during the support window is strongly recommended for all participants and Multi-Member Service Providers. 

This circular outlines the key topics relevant for the production launch of T7 Release 15.0 and provides details regarding the connection test.  

Connection test: 7 November 2026 
Production start: 9 November 2026 

2. Required action

Participants are requested  

• to complete and return the production readiness statement (see section 3.H.) and  
• to register a Technical Contact for the support window (see section 3.G.)  

no later than Friday, 30 October 2026. 

3. Details of the initiative 

Deutsche Börse Group will launch Release 15.0 of the T7 trading system on Monday, 9 November 2026. Please refer to the dedicated document “T7 Release 15.0 - Functional Technical Release Notes Deutsche Börse Xetra and Deutsche Börse Frankfurt, Version 2” for a full overview of both the new and changed functional scope.

The document is available on the Deutsche Börse Cash Market website www.cashmarket.deutsche-boerse.com via the following path: T7 Release 15.0 > Overview and Functionality. 

A. Backward compatibility 

T7 Release 15.0 will not provide backward compatibility with the T7 Release 14.1 interface versions of T7 ETI, FIX LF and EDCI. Participants must use the new interface versions and will no longer be able to connect to T7 using the T7 Release 14.1 interface layouts following the production launch of T7 Release 15.0. 

The public market and reference data interfaces, including EOBI, EMDI, MDI and RDI/RDF, as well as reports and data files, will also not provide backward compatibility. 

B. Decommissioning of deprecated ETI Requests 

The following deprecated ETI requests will be permanently decommissioned with the production introduction of T7 Release 15.0 and will no longer be available: 

• New Order Single 
• New Order Single (short layout) 
• Replace Order Single 
• Replace Order Single (short layout) 

Participants must ensure that they have completed the migration to the replacement ETI requests prior to the production launch. 

For a detailed overview of the new ETI order entry requests to be implemented, please refer to the Cash Market Deutsche Börse Readiness Newsflash from 4 September 2026: Mandatory Implementation of New ETI Order Entry Requests with T7 Release 15.0. 

C. Decommissioning of T7 Java Admin GUI 

The T7 Java Admin GUI will be decommissioned with the production launch of T7 Release 15.0, as is already the case for the T7 Release 15.0 Simulation.  

Participants must ensure that their migration to the T7 Web Admin GUI is completed before the production launch on  9 November 2026. Following the deployment of T7 Release 15.0, access to the T7 Java Admin GUI will no longer be supported.  

The new T7 Web Admin GUI is fully operational and available to all T7 users via Internet and N7 leased-line access. 

For further information, please refer to: New T7 Web GUIs  

D. Preparations for Friday, 6 November 2026 and Saturday, 7 November 2026 

On Friday, 6 November 2026, T7 Release 14.1 will be in production for the last time. Reports for the business day 6 November 2026 can be expected at the usual time.  

On Saturday, 7 November 2026, Deutsche Börse will convert the T7 production systems to Release 15.0 and initial reference data for business day 9 November 2026 will be available via RDI and RDF following the start of the system in preparation for the support window. 

E. Support Window and Important Information for T7 Release 15.0 

This section details the upcoming support window and essential information for the T7 Release 15.0 production launch on Monday, 9 November 2026. 

Support Window on Saturday, 7 November 2026 (15:00 – 18:00 CET) 

Connectivity testing during the support window is strongly recommended for all participants and Multi-Member Service Providers to ensure connectivity at the start of trading on Monday, 9 November 2026. Please ensure that a staff member is available to log on to the T7 production system (e.g., via the T7 Java Trader GUI, T7 Web Admin GUI and/or third-party applications). 

At this time, the T7 production system will be available for connectivity testing on the ETI, FIX LF, FAGSE Gateways, RDI, MDI, EMDI, EOBI and EDCI interfaces and via the T7 Web Admin GUI, the T7 Web Clearer GUI and the T7 Java Trader GUI. No order and quote entries will be possible. 

Start of Day: during the support window, at approximately 15:30 CET, all products in the T7 production systems will be set to “Start of Day” providing participants the opportunity to perform their regular start of day activities:  

Support Window Updates: Deutsche Börse will inform participants about the general progress of the connection test via implementation news on the Cash Market website available under the path: Implementation News

Following the end of the support window, the T7 15.0 production system will shut down on Saturday, 7 November 2026 at 18:00 CET and will remain unavailable until Sunday evening. 

F. Monday, 9 November 2026 – Production Start 

The first trading day with T7 Release 15.0 will start as usual. 

Please note: As the system will be restarted on Sunday evening after the connection test on Saturday, the initial reference data file for the business day on 9 November 2026 will be regenerated. 

As the reference data that will be provided on 7 November 2026 via RDI and RDF prior to the support window may potentially contain some changes, participants are required to use the initial reference data provided following the system start for 9 November 2026. 

Persistent orders entered until the end of trading on 6 November 2026 but not executed will remain available on 9 November 2026, unless other validity restrictions apply. 

A list of any items relevant prior to the production start of T7 Release 15.0 will be provided as of 6 November 2026. This “Known Limitations” list will be available on the Cash Market website under the following path: T7 Release 15.0 > Production

G. Technical Contact for the Support Window 

Please enter details of the contact person who will be available during the support window in the Member Section of Deutsche Börse Group not later than Friday, 30 October 2026. The path is:  

Member Section > Company Contacts > [+] Create Contact > Contact Types > Release

Please choose the category “Connection Test Responsible” and make sure to check the box “Cash Market T7”. This will ensure that Deutsche Börse will be able to reach you in any emergency between Saturday, 7 November 2026 and production start on Monday, 9 November 2026. 

H. Provision of the Readiness Statement 

We kindly ask all Trading Participants, ISVs and TPIPs to submit the Readiness Statement for T7 Release 15.0 by Friday, 30 October 2026 at the latest. Please note that the provision of the Readiness Statement is mandatory.  

The online Readiness Statement for T7 Release 15.0 is available here: Readiness Statement. 

Please enter your dedicated Trading PIN in the online questionnaire. It is available for Central Coordinators and their Deputies in the Member Section under: My Profile > PIN. 

Further information