What is the fine-grained topic of the following text: Tel Aviv, 3rd October 2017: The world’s leading IP communications enabler Softil today announces that its award-winning BEEHD software development kit (SDK) has been selected by Hoimyung Corporation to build next generation 3GPP MCPTT standard compliant mission-critical push-to-talk communication terminals for use in South Korea’s new hi-speed railway link. Only return the topic.
Softil's BEEHD software being used by Hoimyung Corporation for South Korea's new hi-speed railway communication terminals.