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Integration
Cybertel Bridge provides a comprehensive range of integration capabilities covering interfaces and systems essential to mission-critical service deployment, including interworking functions, QoS control, authentication, OSS, and multimedia delivery, ensuring seamless compatibility and network-wide interoperability.
IWF
The Interworking Function (IWF) bridges the gap between Tetra/Tetrapol/P25 systems and 3GPP-based Mission Critical Services (MCX).
As defined by 3GPP standards (TS 23.283, 24.483), IWF enables interoperability between MCPTT, MCData and MCVideo with traditional radio systems.
This integration allows first responders, public safety organizations and critical infrastructure users to communicate seamlessly—even across heterogeneous networks.
Key Benefits
- Seamless LMR–MCX Communication
- Secure Media Exchange (e.g., SRTP)
- Interworking Group & Private Call Support
- Tetra Caller ID Display
- 3GPP Compliant Interfaces: IWF-1 / IWF-2 / IWF-3
Use Cases
- Police departments operating both legacy P25 and LTE-based MCX user
- Nationwide emergency services needing unified group calls across diverse regions
- Utility companies transitioning from analog to digital communication
Integration Architecture
IWF Integration Reference Points
Cybertel IWF connects at three standardized 3GPP interfaces:
| Reference point | Interface | Description |
|---|---|---|
| IWF-1 | MCPTT ↔ LMR | For push-to-talk communication |
| IWF-2 | MCPTT ↔ LMR | For mission-critical data exchange |
| IWF-3 | MCPTT ↔ LMR | For group affiliation and control |
All connections are made via RESTful APIs and SIP-based signaling protocols, ensuring secure and standards-based communication.
| Reference point | Protocol | Entities | Description |
|---|---|---|---|
| IWF-1 | SIP,RTP,RTCP | MCPTT ↔ LWF | Peer to peer interconnection for group affiliation, call control, floor control and media between IWF G/W and MCPTT server |
| IWF-2 | SIP | MCData ↔ LWF | Peer to peer interconnection for data services between IWF G/W and MCData server |
| IWF-3 | HTTPS, SIP | CSC (GMS) ↔ IWF | Group management interconnection between IWF G/W ad GMS |
| CSC-9 | HTTPS | CSC (KMS) ↔ IWF | Obtain security related information (e.g. encryption keys) from CSC |
Integration Model
Supported Scenarios
- MCX user initiating private/group call with LMR user
- LMR user initiating private/group call with MCX user
- Floor control arbitration
- Temporary group creation & teardown
- Bidirectional identity mapping
Cybertel IWF Highlights
Cybertel IWF solution is designed for reliability, flexibility and compliance:
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Identity Mapping
Exchanging user lists for call establishment across MCX and LMR
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Call Control
Private and group call initiation, floor management and call release
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Security Integration
End-to-end encrypted media handling with SRTP and LMR encryption standards
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REST API-Based Regrouping
Dynamic group creation, modification and teardown
Technology Stack
- Protocols: SIP, RTP, SRTP, HTTP/REST
- Encryption: PCK-based key exchange and SRTP tunnel
- Standards: 3GPP TS 23.283, TS 24.483
Why Cybertel IWF?
- Proven MCX Expertise(Having commercial references)
- Trusted by National Safety Agencies
- Fully 3GPP Compliant
- Scalable and Vendor-Neutral Design
