Intertex
Intertex Data AB was founded in 1982 by Karl-Erik Ståhl. The company design and manufactures various types of modems and ADSL modems with built-in firewall and router. The products have full support for SIP based multimedia real-time communication, and includes Session Border Controller (SBC), SIP Proxy, SIP Registrar and IP PBX functionality. The modems are also sold under the brand PowerBit and SurfinBird.