In 1992 a direct communication link based on the latest technology at the time was installed as part of a friendship treaty between the two countries.

This similarity suggests an established communication link and common cultural heritage among these sites.

This allows separate parts of a complex process to have individual control while allowing the subsystems to co-ordinate over the communication link.

Various other errors which may occur during the open include directory update failures, un-permitted multiple connections, media failures, communication link failures and device failures.

The air interface operates as a full duplex communication link.