The Europe-Russia-Mongolia-China (ERMC) is an Eurasia terrestrial cable route connecting Europe, Russia, Mongolia and China, jointly operated by TTK and China Unicom via, Mongolia Railway.

TTK, Monglia Railway Authority (RailCom, now GEMNET) and China Unicom operate the ERMC terrestrial cable system via Erlianhaote (Erenhot ) in China-Mongolia Border.

In Mongolia, EMRC runs over 2 parallel optical cable routes of approximately 1000km each, along the railway connecting southern and northern borders of Mongolia along Sukhbaatar-Darkhan-Ulaanbaatar-Choir-Zamyin Uud. It forms OTN network with ROADM nodes and reserve protection in Mongolia.

The ERMC cable system is capable of 100Gbps DWDM, offering a low latency Eurasia route: 

• Beijing to Frankfurt: 109ms
• Hong Kong to Frankfurt: 146ms.

TTK offers other Eurasia terrestrial cable routes, Europe-Russia-Asia (ERA)  to China, and Europe-Russia-Japan (ERJ) to Japan.