Configure Tata SIP Trunk on FreePBX in Patna

Integrating Tata SIP Trunk with FreePBX

Integrating a Tata Tele Business Services SIP Trunk with a FreePBX environment requires specific configuration parameters to ensure outbound call authentication, correct inbound DID routing, and clean audio delivery. Our telecom engineers at Call Soft Corporation have prepared this complete configuration guide to assist call center administrators and network engineers in Patna.

Depending on whether your Tata trunk uses IP authentication (matching your static IP gateway) or user registration (auth username and secret), you will need to add custom PEER settings and Dialplan routing rules in FreePBX.

1. FreePBX Configuration Settings

In the FreePBX GUI, navigate to Connectivity -> Trunks -> Add SIP (chan_sip) Trunk and apply the following settings:

For incoming calls, make sure you configure an Inbound Route in FreePBX pointing your pilot/DID numbers to your IVR or Queue.

2. Gateway Routing & Firewall Setup

For most Indian operators, voice traffic must be routed via a dedicated gateway interface on your server or router. Ensure that your server is configured with the correct static routes. For example:

Additionally, disable SIP ALG on your office router or firewall. SIP ALG commonly alters headers and breaks registration or causes one-way audio issues. Ensure UDP ports 5060 (SIP signaling) and UDP ports 10000–20000 (RTP media) are open and forwarded correctly.

Frequently Asked Questions

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