SignalBridge

SignalBridge decodes 4G S1AP and 5G NGAP traffic (with related NAS handling), applies YAML-driven filters (protocol, procedure code, IP allow/deny) and optional IMSI anonymisation, and writes PCAP, TCP/UDP streams, or HTTP(S) NDJSON batches. It exposes Prometheus metrics for operations and is designed to sit at the edge of the mobile network so sensitive identifiers can stay under operator control while structured signalling flows onward to analytics or platforms such as Signal Cloud.

SignalBridge is part of Signal Cloud, but can be used separately.

Read the technical primer on Signal Cloud at https://melrosenetworks.com/insights/signal-cloud-technical-primer.

SignalBridge is copyright © 2026 Melrose Networks (Melrose Labs Ltd). For non-commercial use, the software and docs are under Creative Commons Attribution-NonCommercial 4.0 (CC BY-NC 4.0): you may use, share, and adapt them if you give appropriate credit. Those license terms can be found in LICENSE on GitHub. Commercial use is not allowed under that license; you need a separate commercial license from Melrose Networks (e.g. [email protected] or your usual contact).