January 2026 — Siperb today announced support for terminating WhatsApp voice calls directly via standard SIP trunking, allowing businesses to receive and manage WhatsApp calls using the same SIP, PBX, and softphone infrastructure they already operate.
This capability follows recent platform changes by Meta, which opened WhatsApp voice services to SIP-based termination using WebRTC-aligned signaling and media principles. These changes closely mirror the architecture Siperb has adopted from the outset, enabling WhatsApp integration without proprietary gateways, protocol translation layers, or channel-specific logic.
A Unified Entry Point for Modern Voice Channels
With this release, WhatsApp voice calls can be terminated through a regular Siperb trunk connection and routed onward just like any other inbound call — whether that destination is a SIP-based PBX such as Asterisk or FreeSWITCH, a contact-center queue, or directly to the Siperb Softphone on web, desktop, or mobile.
From an operational perspective, WhatsApp becomes simply another voice ingress into the system. Calls originating from PSTN, mobile networks, browsers, or messaging platforms are handled consistently, logged centrally, and exposed to the same monitoring, tracing, and policy controls.
End-to-End Encryption Preserved
A key requirement for WhatsApp integration is maintaining the platform’s strong security and privacy guarantees. Siperb’s implementation preserves end-to-end encryption throughout the call lifecycle. Signaling remains secure, and media can flow peer-to-peer where supported, while still allowing controlled termination and routing within enterprise environments.
This approach allows businesses to benefit from WhatsApp’s reach and familiarity without compromising on security or compliance.
Seamless Call-Back and Bi-Directional Communication
Where permitted by the end user, Siperb also supports WhatsApp “call-back” flows using the same trunking infrastructure. This enables bi-directional communication patterns in which businesses can respond to missed or inbound WhatsApp calls using standard SIP logic, routing rules, and agent availability — without maintaining a separate messaging or voice stack.
Designed for AI and Automation
Because WhatsApp calls are presented as standard SIP sessions, they can be processed using Siperb’s existing real-time workflows, including call recording, media analysis, and AI-assisted handling. This allows WhatsApp voice traffic to be routed to human agents, AI agents, or hybrid flows without special-case handling.
For organizations experimenting with AI-driven voice automation, this provides a practical way to extend those capabilities to one of the world’s most widely used communication platforms.
A Validation of WebRTC-First Architecture
“This is one of those moments where long-term architectural decisions really pay off,” said Conrad de Wet, Founder of Siperb. “We’ve always believed that WebRTC-based communications would eventually converge with mainstream platforms. WhatsApp opening up to SIP termination validates that belief and allows our customers to adopt this capability without changing how they already build or manage voice.”
Availability
WhatsApp call termination is available immediately to Siperb customers via standard trunk configuration. No additional connectors or channel-specific setup is required.
For more information, visit https://www.siperb.com
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