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Small Business VoIP Over Broadband Network
• The IP PBX System Provides SIP Server (Registrar and Proxy) Functions
• VoIP Service Provider Supports:
– Voice and Services – Phone Numbers, Call Origination & Termination, Off-Net Call Routing
– Voice Messaging Services – Voicemail, Unified Messaging, etc.
• Voice and Data Traffic Between Sites is Carried by the IP Network.
• PSTN Carries Overflow Voice Traffic if the VoIP Service is Unreachable via LAN Attached
Gateway Appliance (PSTN = Public Switched Telephone Network)
Very Small Business
Very Small Business
IP PBX
IP PBX
Legacy Telecom Network
PSTN
IP Network
VoIP SP Network
IP Phones
IP Phones
Gateway
Gateway
Router
Router
BB Modem BB Modem
Customer
Customer