Alti-Mobile Extension - The Alti-Mobile extension capability allows any telephone with a unique number to call into an AltiGen telephone system be activated as an extension of that AltiGen business telephone system; The Alti-Mobile Extension capability extends PBX phone system extension capabilities to any mobile phone or remote telephone; With the Alti-Mobile extension capability, any cell phone, PCS phone, PSTN phone or any external PBX extension on any other telephone system that has a Direct Inward Dialing number, can become a remote AltiGen telephone system extension and have the same call routing, call handling, call transfer, conferencing and company voice mail, voice messaging, and call center agent functions as any internal extension; These features will be delivered to the external telephone through the AltiGen telephone system