B2BUA-based call control
Robust session control for VoLTE/VoWiFi with precise state handling.
Telecom · Flagship
Telephony Application Server (TAS)
Telephony Application Server for IMS/VoLTE/VoWiFi & supplementary services. Low-latency call control, robust feature interaction handling, and clean hooks to OCS/PCF.
Carrier-gradeLow-latency SIP signalingHorizontally scalable
Purpose-built for modern IMS voice
OVOO TAS powers VoLTE/VoWiFi supplementary services with deterministic latency. It resolves feature interactions cleanly and exposes policy/rating hooks for PCF/OCS so commercial logic stays consistent end-to-end.
- • IMS-aligned call state control (B2BUA)
- • Feature interaction resolution & guardrails
- • PCRF/PCF & OCS triggers for charging & QoS
- • Observability and SRE-first operations
Key features
Everything you need to launch/modernize IMS services fast.
Feature interaction engine
Deterministic ordering, gating and resolution across services.
Policy & charging hooks
Clean integrations to PCF/PCRF and OCS for QoS and real-time charging.
Interoperability
Works with SBCs/IMS cores; northbound APIs for OSS/BSS integrations.
Observability
Tracing, SLIs and structured logs with ready-made dashboards & alerts.
Cloud-native ops
Containers, blue/green, GitOps, zero-downtime upgrades and rollbacks.
Common TAS services
Click a diagram to zoom.
TAS overview
High-level architecture: LRF/MMTel, SIP Service Broker, provisioning stack, MRF, IMS Core connectivity.
SIP-based user configuration
Self-provisioning with SIP feature codes (activate/deactivate services via TAS).
Integration view
Operational integrations: KPIs/metrics, SNMP traps, logs (ELK), provisioning API/GUI, MRF, CDR export.
Migration made easy
Move from your legacy TAS without downtime or risky rewrites.
1) Interop first, replace later
Start as a service broker in front of your current TAS/SBC. Mirror flows, validate features and charge triggers, then promote OVOO TAS to primary.
- • Parallel run (shadow/canary)
- • Policy/OCS hook validation
- • Automated checks & rollback
2) Zero-downtime cutover
Blue/green upgrades, SLO guardrails and health-checked components. SRE runbooks and dashboards included.
- • Deterministic feature ordering
- • Session continuity & retries
- • Structured tracing & SLIs
Packages
Choose the scope that fits your rollout and compliance needs.
Foundation
- B2BUA core & supplementary services
- PCF/OCS hooks (baseline)
- Observability & basic HA
Scale
- Service broker glue & interaction engine
- Zero-downtime upgrades
- Runbooks & SRE practices
Enterprise+
- Geo-redundancy & compliance triggers
- Advanced policies & governance
- Managed SRE or full handover
Replacing a legacy TAS?
Start as a broker, then cut over with zero downtime. See the migration guide.