Enterprise Telephony & Cloud Calling
Modernise enterprise voice without losing control of carriers, numbering, security or call quality.
End-to-end enterprise telephony services covering consulting, architecture, SIP integration, cloud calling migration, session border controllers, voice security and managed operations — a single governed voice fabric across every site, region and carrier.
A single dial plan across every site, carrier and cloud — engineered, secured and supported.
Microsoft Teams Phone, Zoom Phone and Webex Calling under a single dial plan.
Direct Routing, Operator Connect and Tier-1 SIP trunk integration.
Monitoring, MACD, quality tuning and carrier escalation under SLA.
Multi-vendor by design — platforms are matched to workforce persona, security posture, integration surface and operating model.
- Microsoft Teams Phone
- Zoom Phone
- Cisco Webex Calling
- Direct Routing
- Operator Connect
- Ribbon · AudioCodes · Oracle SBC
- Tier-1 SIP carriers
Scope in detail
- Cloud Calling & UCaaS
Enterprise cloud telephony on Microsoft Teams Phone, Zoom Phone and Cisco Webex Calling — consolidating legacy PBX estates into a single software-defined voice platform.
- Direct Routing & Operator Connect
SIP integration with Tier-1 carriers through Direct Routing, Operator Connect and Zoom Provider Exchange — flexible carrier choice, resilient call paths and centralised policy control.
- Session Border Controllers
Highly available SBC architectures using Ribbon, AudioCodes and Oracle — securing SIP borders with topology hiding, encryption, media transcoding and toll-fraud protection.
- Dial Plan & Numbering Design
Global numbering architecture, least-cost routing, DID rationalisation and emergency-service compliance — a single dial plan that scales across regions and business units.
- Number Portability & Migration
Wave-based number porting, coexistence planning and cutover management — protecting service continuity while retiring legacy telephony and consolidating carriers.
- Voice Security & Compliance
Encrypted signalling and media, fraud analytics, recording integrity and regulatory retention — aligned with PCI-DSS, MiFID II, HIPAA and Dodd-Frank obligations.
- Voice Quality & Analytics
End-to-end monitoring of MOS, jitter, latency and packet loss with per-call diagnostics — measurable voice quality across networks, endpoints and carriers.
- High Availability & Resilience
Geo-redundant call routing, survivable branch appliances and multi-carrier failover — voice services remain available during network, carrier or platform disruption.
- Managed Voice Services
Monitoring, incident management, moves-adds-changes, carrier escalations and lifecycle upgrades — voice operated as a governed service with clear SLAs.
Where workplace programmes break down
- Dial plans fragment across platforms
Multiple UCaaS platforms and legacy PBXs coexist without a unified dial plan — licensing is duplicated, numbers stranded and operational cost grows.
- Inconsistent call quality
MOS, jitter and packet-loss issues surface without per-call diagnostics, making root cause across networks, endpoints and carriers hard to isolate.
- SIP borders exposed
SBCs are missing, unpatched or single-homed — creating toll-fraud, topology-exposure and availability risk on the voice edge.
- Carrier lock-in and stranded numbers
Number portability, LCR and E911/E999 compliance are blocked by legacy contracts, complicating consolidation and cloud calling migration.
Engagement approach
A practical enterprise voice lifecycle covering assessment, architecture, SIP integration, migration, security and managed operations across cloud calling and legacy estates.
- Assess
Baseline PBX, UCaaS licensing, carrier spend, dial plan, SBC posture and voice-quality signals across sites and regions.
- Design
Define the target cloud calling architecture, dial plan, SBC pairing, carrier model and voice-security controls.
- Integrate
Deliver wave-based number porting, SBC deployment, Direct Routing or Operator Connect integration and endpoint rollout.
- Operate
Monitor voice quality, run MACD, coordinate carrier escalations and maintain platforms, licences and lifecycle upgrades.
Deliverables & artefacts
- Cloud calling and PBX consolidation blueprint
- Global dial plan, LCR and E911/E999 design
- SBC architecture and voice-security baseline
- Number portability and carrier cutover plan
- Voice quality (MOS/jitter) monitoring baseline
- Managed voice runbook and SLA schedule
Fix What's Broken — Remediation Sprints
Call-quality complaints, meeting-room reliability issues, contact-centre routing gaps or a stalled Teams/Zoom/Webex rollout? We run fixed-scope UC & collaboration remediation sprints against a defined outcome.
- Voice quality (QoS/MOS), SBC and SIP-trunk configuration cleanup
- Meeting-room / MTR / Zoom Room fleet health, AV integration and BYOD fixes
- Contact-centre routing, IVR, CRM integration and reporting remediation
Support & Maintenance — AMC-Backed
Keep telephony, meetings and contact-centre platforms healthy after go-live — moves-adds-changes, firmware and vendor-TAC escalation under a Jiva AMC with contractual SLAs.
- L1/L2/L3 support for leading UC, meeting-room and contact-centre platforms
- MAC (moves, adds, changes), firmware, licence and endpoint lifecycle care
- Vendor-TAC escalation, carrier coordination and quarterly platform reviews
Enterprise Telephony & Cloud Calling FAQs
Assessment, design, implementation, integration and lifecycle support across calling, meetings, collaboration, endpoints and identity.
Modernise enterprise voice
Ready to modernise enterprise voice?
Engage Jiva for a discovery workshop. Jiva assesses the current PBX and carrier estate, define the target UCaaS architecture and deliver a phased migration covering design, SBC integration, number porting, security and managed operations.