How to Connect a Dinstar GSM Gateway to Callsavvy

Step 1: Configure Your Callsavvy SIP Trunk

1. Log into your Callsavvy admin portal.
   
   
2. Navigate to Admin & Settings > SIP Trunking & BYOC.
   
   
3. Under the SIP Trunk tab, click Create SIP Trunk.
   
   
4. Fill in the required parameters:
   
   
   • Gateway Name: Enter an identifiable name (e.g., Dinstar-UC2000).
     
     
   • Caller ID: Enter the phone number associated with the SIM card in your Dinstar gateway.
     
     
   • SIP Proxy / Domain: Enter your Dinstar gateway’s Public IP address or DDNS hostname, followed by port 5060 (e.g., 198.51.100.1:5060 or mygateway.ddns.net:5060).
     
     
   • Authentication Method: Select Credential (recommended) or IP Authentication.
     
     
   • Username & Password: Enter the credentials created on your Dinstar gateway (see Step 2).
     
     
   • SIP Registration: Set to Enabled if Callsavvy will register to the gateway, or Disabled for direct IP peer-to-peer routing.
     
     
   • NAT Traversal: Set to Enabled if your gateway is behind a local router/NAT without a static public IP.
     
     
   • Preferred Codecs: Enter PCMU, PCMA, G729 (comma-separated).
     
     
   • DTMF Method: Select RFC2833 or SIP INFO (matching your Dinstar settings).
     
     
   • Dial-out Format: Choose E164 or +E164 based on your local carrier requirements.
     
     
5. Click Save.
   
   

Step 2: Configure the Dinstar Gateway

1. Open a web browser and log into your Dinstar Web Management Interface.
   
   
2. Go to System Configuration > SIP Settings (or SIP Account/User Management):
   
   
   • Create a local SIP Account/User matching the Username and Password entered in Callsavvy.
     
     
   • Verify that the local SIP listening port is set to 5060.
     
     
3. Go to Call Handling > IP -> Tel Route:
   
   
   • Create a route where Source is the Callsavvy SIP Trunk/IP and Destination is the Mobile SIM Channel Group.
     
     
   • Set Matching Prefix to _X. (or .*) to allow Callsavvy to route outbound calls out through your SIMs.
     
     
4. Go to Call Handling > Tel -> IP Route:
   
   
   • Create a route where Source is the Mobile SIM Channel Group and Destination is the Callsavvy SIP Proxy IP.
     
     
   • This routes incoming cellular calls directly into your Callsavvy system.
     
     
5. Go to Media Settings > Codec Configuration:
   
   
   • Ensure G.711u (PCMU), G.711a (PCMA), and G.729 are active and placed at the top of the priority list.
     
     

Step 3: Network, NAT, and Firewall Settings

• Port Forwarding: On your edge router, forward UDP Port 5060 (SIP signaling) and UDP Ports 10000–20000 (RTP Audio) to the local IP address of your Dinstar gateway.
  
  
• SIP ALG: Disable SIP ALG on your router settings to prevent SIP header modification and call drops.
  
  
• Dynamic DNS (DDNS): If your Internet Service Provider assigns a dynamic IP address, enable a DDNS service (e.g., No-IP, DynDNS) on your router or Dinstar gateway. Use this hostname in the Callsavvy SIP Proxy field.
  
  

Step 4: Authorize Inbound Calls (Trusted IP Setup)

1. In Callsavvy, navigate to Admin & Settings > SIP Trunking & BYOC.
   
   
2. Click the Trusted IP tab.
   
   
3. Click Add / Create Trusted IP.
   
   
4. Enter your gateway's Public IP address (or router WAN IP) and provide a friendly name.
   
   
5. Click Save.
   
   

Step 5: Test Verification

1. Outbound Test: Place an outbound call from Callsavvy. Verify that the call routes through the Dinstar gateway and displays the correct cellular Caller ID on the receiving device.
   
   
2. Inbound Test: Call the SIM card’s mobile number from an external phone. Verify that the call lands in your Callsavvy call flow or queue.