The SIP Hotspot feature is a built-in function found in modern Voice over IP (VoIP) hardware, most notably on devices manufactured by Fanvil Technology. It allows an administrator to configure a single IP phone as a Hotspot Server that registers directly with an external SIP Provider or PBX server. Multiple other extension devices, known as Hotspot Clients, can then connect locally to that primary phone without requiring individual SIP accounts, essentially acting as a cost-effective, PBX-free intercom and call-distribution network. Phase 1: Prerequisites & Network Installation
Before opening any web management consoles, confirm the base local network requirements:
IP Addressing: Ensure all intended hardware units reside on the same Local Area Network (LAN) subnet.
Power Supply: Boot the designated server device using a compliant 12V DC power adapter or a Power over Ethernet (PoE) network switch.
IP Discovery: Access the system menu on your primary server device to retrieve its current local IP address. Phase 2: Hotspot Server Configuration
Access the Web Portal: Open a web browser on your computer, enter the server phone’s IP address, and log in with your administrative credentials.
Register the Main SIP Line: Navigate to the Line or SIP tab. Enter the registration credentials supplied by your VoIP provider—including the username, authentication password, and outbound proxy server. Ensure the registration status reads as active.
Activate Server Mode: Go to the Line -> SIP Hotspot management tab.
Apply Settings: Change the status dropdown to Enabled and switch the operation mode specifically to Hotspot.
Establish Traffic Protocol: Set the Monitor Type to either Broadcast or Multicast. For multi-device office environments, choose Multicast and assign a local multicast communications address (e.g., 224.0.1.1) to limit unnecessary packet broadcasting across your router.
Assign Local Communication Ports: Enter a custom numeric string into the Local Port field (e.g., 5060 or 6060). Note this number down, as it must match exactly on every client endpoint. Phase 3: Hotspot Client Configuration
Repeat these configuration steps for every secondary extension or door phone joining the group:
Log In Locally: Connect to the unique web user interface of the client phone via its respective local IP address.
Disable Independent Registration: Do not fill out external SIP server credentials on the client phone’s primary lines.
Match Network Identifiers: Navigate directly to the SIP Hotspot settings page.
Activate Client Mode: Set the feature toggle to Enabled and change the mode dropdown menu to Client.
Replicate Group Credentials: Input the identical Monitor Type, Multicast Address, and Local Port defined during the server step. Phase 4: Managed Extensions Assignment
Once the clients are pointing to the correct address, they must be approved by the main console:
Return to the Hotspot Server’s web control panel and click on the Hotspot Managed Extension page.
Review the list of connected endpoints, which will display their MAC addresses, hardware models, and inner IP positions.
Select the discovered devices from the Unmanaged Extensions block and move them into the Managed Extensions column. The system will automatically hand down unique internal extension assignments (such as 1, 2, 3, etc.) relative to the primary host line. Phase 5: Configuring Ringing Logic
Define how incoming external calls distribute across the group by adjusting the External Ringing Mode variable on the primary server page: Ringing Mode Choice Functional Behavior ALL
The master phone and all secondary client endpoints ring concurrently. Extension
The primary server phone stays silent; only the managed client extensions ring. Host
Incoming line requests trigger alerts exclusively on the master phone.
If you are setting this up for a specific environment, let me know:
What brand and model of IP phones or door intercoms are you currently configuring?
Do you plan to deploy these over a local broadcast network or a restricted multicast subnet?
Do you need to route incoming calls to all extensions simultaneously, or sequentially? SIP Hotspot – Fanvil
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