BSNL Enterprise SIP Trunking Setup & Integration
BSNL (Bharat Sanchar Nigam Limited) Enterprise SIP Trunking runs on their robust Next Generation Network (NGN). BSNL provides extremely secure, government-approved IP voice trunking with national reach. It is highly recommended for government agencies, public sectors, and corporate networks requiring secure MPLS / VPN routing.
Why Choose BSNL SIP Trunking?
Upgrading from legacy copper-based ISDN PRI lines to a digital BSNL SIP Trunk connection offers massive advantages in scalability, call quality, and cost savings. With a direct IP-based session configuration, your business gets:
High Uptime SLA
99.0% Network Availability
Massive Scalability
Scalable channel configurations starting from 10 channels
Key USP: Highly secure MPLS/VPN tunneling, excellent government connectivity, and highly competitive national call tariffs.
Technical Specifications
These specs are crucial for network engineers configuring Session Border Controllers (SBC) and IP-PBXs:
Plans & Estimated Tariffs
Since enterprise voice services are customized, these are indicative tariff configurations. Contact us for final discounted rates:
| Trunk Capacity | Segment Type | Rental Price | Billing Model |
|---|---|---|---|
| 10 Channels | Small Enterprise / PSU | Competitive Rental | Low tariff local/STD call rates |
| 30 Channels | Corporate / Institution | Custom Quote | Standard NGN SIP plan with free call value options |
| 100+ Channels | Government Departments / Large PSUs | Bespoke Quote | Custom SLA agreements and dedicated enterprise support |
*Note: Government taxes (GST @18%) and DoT installation charges extra. Contact +91 75999-67999 for customized tariff designs.
How to Configure BSNL SIP Trunk on FreePBX/Asterisk
Setting up a telecom voice trunk requires technical static routing rules and SIP trunk options configuration. Here is the step-by-step workflow:
Physical Feasibility & Link Commissioning
The telecom operator delivers a dedicated fiber cable to your server room. This is terminated into an ONT or dynamic gateway router which segregates the VoIP network.
Configure Router Static Routes
Set up a static routing policy on your main gateway firewall (e.g. Sophos, Fortinet, Mikrotik) to direct all SIP and media traffic destined for the operator softswitch IP through the dedicated gateway port.
Create SIP Trunk Peer in PBX
Inside FreePBX or Asterisk, create a new SIP/PJSIP trunk. Add the host details (Registrar/Proxy IP provided by BSNL), select codecs (G711a/G729), and set authentication to "None/Static IP".
Configure Inbound and Outbound Routes
Map your DID numbers to ring groups or IVR system in Inbound Routes. Map outbound dial patterns (like dialing 9 before call) to route outbound voice calls through this new trunk.
Detailed Configuration Guides for BSNL SIP Trunk
Select your PBX system and local business hub to view tailored installation settings, peer details, and static routing commands:
Guides by PBX Platform:
Top Cities (India):
Frequently Asked Questions
❓ Is a VPN required for BSNL SIP Trunking?
Yes, for security, BSNL NGN SIP trunks require a secure connection, often configured using BSNL's private MPLS network or an OpenVPN tunnel established between your PBX and BSNL's softswitch.
❓ Can we configure BSNL SIP trunks on open-source FreePBX?
Yes. It requires setting up a SIP peer on FreePBX, configuring the correct network gateway, and setting up the static route so that traffic to BSNL's SBC (Session Border Controller) is routed through the BSNL interface.
❓ How do BSNL call tariffs compare with private operators?
BSNL corporate and enterprise plans offer some of the lowest local, STD, and bulk tariff rates in India, making them highly economical for high-volume public sector and corporate offices.
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