TeamSpeak (TS thereafter) is a proprietary software for audio communication that operates on multiple clients, underpinning its user coverage across almost all common OSes. Using Voice over Internet Protocol (VoIP, aka IP Telephony), users may connect to either self-hosted or public TS servers, by which usage cases including in-game instant communication, encrypted voice calls and conference calls could be supported.

Why OpenWRT?

Convenient as it may seem, VPSes in the Chinese mainland usually come with exiguous bandwidth limits.