Class 4 Voice Softswitch Architecture | AVM Networks Limited

Q: Does the switch support high-availability (HA) clustering?

Yes, the architecture supports active-standby and active-active geo-redundant clustering to support carrier-grade SLA uptime requirements.

Q: What is the difference between a Class 4 and Class 5 softswitch?

A Class 4 softswitch routes high-volume wholesale voice traffic across carrier networks over long distances and intercontinental transit. A Class 5 softswitch handles end-user subscriber connections, local features, extensions, and PBX functionality.

Q: How does Least Cost Routing (LCR) evaluate carrier rate decks?

Our LCR rating engine parses multi-tier CSV/XLS rate decks in real time, factoring in destination dial codes, quality metrics (PDD, ASR), margin requirements, and time-of-day tariffs.

Q: How does the switch detect anti-FAS (False Answer Supervision) and Wangiri fraud?

Built-in telemetry algorithms monitor call duration anomalies, premature 200 OK responses prior to audio stream connection, and high-frequency missed calls to automatically block fraudulent partner IPs.

AVM Networks Carrier Engineering Team

Class 4 Wholesale Voice Softswitch

Carrier-Grade Class 4 Routing & Billing Platform

High-capacity Class 4 softswitch designed for international voice carriers and wholesale transit providers. Executes precision Least Cost Routing (LCR), rigorous CDR processing, and multi-protocol signaling mediation required to orchestrate vast bilateral interconnect networks.

Architecture & Carrier SLA Summary

Class 4 Wholesale Voice Softswitch is provisioned across AVM Networks Limited international carrier network (AS210257). Technical architecture delivers 99.999% high availability, direct SIP RFC 3261 peering, SMPP v3.4 multi-bind transceivers, STIR/SHAKEN attestation, and a verified zero False Answer Supervision (FAS) guarantee backed by dynamic Least Cost Routing (LCR) and 24/7/365 NOC engineering operations.

Architectural Capabilities & Features

Dynamic Least Cost Routing (LCR)

Automated routing engine evaluating multi-carrier rate decks in real time to optimize margins against stringent ASR and PDD SLA thresholds.

Real-Time Billing Engine

Integrated prepaid and postpaid billing execution, providing accurate CDR reconciliation, concurrent channel enforcement, and automated invoicing.

Signaling Protocol Mediation

Seamless protocol interworking (e.g., SIP to H.323 translation) bridging disparate networks across global interconnects.

Fraud Detection & Mitigation

Heuristic analysis algorithms monitoring traffic patterns to instantly identify and block suspected toll fraud, Wangiri attacks, and unauthorized caller ID manipulation.

Technical Specifications

Platform Architecture	Bare-metal or cloud-native clustered deployments
Capacity	Scalable from 1,000 to 100,000+ concurrent channels
Billing Support	Radius, Diameter, native internal rating engine

Engineering Blueprints & Technical Guides

Related Carrier Services & Interconnect Links

Cloud PBX → SBC → A-Z International Coverage Directory → Request Rate Deck / SIP Interconnect →