Mountain View-based Internet calling service JAJAH said Thursday afternoon that it has expanded its services to include fully functional PBX services. The firm said that it will allow small and medium sized businesses to install a virtual PBX and make VoIP calls using JAJAH's network. The new offerings are part of the firm's SMB Solution Suite. The PBX services will include voicemail, SMS, conference calls, and other business-related features. The new services put JAJAH into competition with hosted PBX services like RingCentral, GotVMail, VirtualPBX, and many others.