TM-10K GEN 2 is the next generation in RTS Trunk Masters. The RTS Trunking System manages communications between separate intercom systems using intercom ports reserved and connected between the intercom systems. Keypanels or other data devices can communicate with various destinations in other intercom systems via the reserved intercom ports. (This is different from bus expansion, in which the bus system of two (2) or more frames interconnect to form one (1) system with decentralized hardware.) The RTS Trunking System consists of a TM-10K GEN 2 that supports trunking data through Ethernet. Add a backup TM-10K GEN 2 to prevent downtime in the event of a failure of the main master control unit.