In June 2015, the European Telecommunications Standards Institute issued the ETSI EN301511V12.1.1 standard, which sets out the basic requirements for mobile stations in the GSM900 / GSM1800 band digital cellular communication system.

The main updates are as follows:

1. Increase the ER-GSM900 band mobile terminal equipment requirements in each chapter. Note: The ER-GSM900, the Extended Railway GSM 900, broadens its frequency range (TX: 873-915, RX: 918-960) on the basis of the original railway communication system.

2. Update the reference standard, in particular ETSI TS 151 010-1 (V12.2.0) (11-2014):

"Digital cellular telecommunications system (Phase 2+) mobile Station (MS) conformance specification;

Part 1: Conformance specification (3GPP TS 51.010-1 version 12.2.0 Release 12) ".

3. Increase the interpretation of EGPRS, E-GSM, ER-GSM900, GPRS, GSM900, GSM, P-GSM, R-GSM definitions.

4. Added Section 4.2.27 and Section 5.3.27 - Requirements for blocking and spurious responses in DLMC configurations.

Note: DLMC refers to Downlink Multi-Carrier mode, which refers to the downlink multi-carrier mode.

5. Added Section 5.2 - Explanation of Test Results.

6. Add a new chapter in Appendix A, paragraph A.1 - List of technical requirements.

7. The standard enforcement time is March 31, 2017.