ShelCron

VoIP & Telecom

VoIP Infrastructure

End-to-end voice platform design: signaling, media, edge, and operational tooling for production telephony.

We design and implement VoIP infrastructure that holds up under real traffic—SIP signaling paths, media handling, interconnect edges, numbering, and the monitoring that operators need day to day. Engagements range from greenfield platforms to hardening and restructuring existing estates without a reckless cutover.

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Who it’s for

  • VoIP carriers and aggregators building or modernizing platforms
  • Contact centers consolidating fragmented voice stacks
  • MSPs delivering hosted voice to business customers

Problems we address

  • Signaling, media, and carrier edges grew organically and are hard to reason about
  • Capacity and failover paths are undocumented or untested
  • Operators lack a clear change window and rollback story

Expected outcomes

  • Target architecture with clear roles for proxy, media, SBC, and data planes
  • Phased delivery with staging validation before production cutover
  • Runbooks, diagrams, and monitoring baselines for ongoing operations

Capabilities

Concrete engineering capabilities included in a typical engagement for this service.

Voice platform architecture and capacity planning

SIP/media path design and interconnect strategy

High-availability topology recommendations

Security baselines for exposed SIP edges

Observability and operational handover

Technology

Representative technologies used for this service. Final stack depends on your estate.

  • SIP
  • RTP/SRTP
  • OpenSIPS
  • Kamailio
  • FreeSWITCH
  • RTPengine
  • Linux
  • Prometheus
  • Grafana

Architecture

Voice signalling path

Users and carriers meet through SBC, SIP proxy, and media services.

UsersAgentsSBCSIP ProxyMedia ServerCarrier

Deliverables

  • Architecture document and component inventory
  • Configured staging and production environments as scoped
  • Routing and interconnect baselines
  • Monitoring dashboards and alert suggestions
  • Operator runbooks and handover session

Out of scope

  • Regulatory licensing filings
  • Carrier contract negotiation
  • 24/7 on-call unless scoped as a managed retainer

Timeline

Typical timeline

4–12 weeks by platform complexity

Timeline depends on scope, access, and dependencies—not a delivery guarantee.

Process

A clear delivery path from discovery through handover and optional support.

  1. 01

    Discovery

    Goals, constraints, success criteria, and current-state review.

  2. 02

    Architecture

    Target design, interfaces, risks, and delivery sequence.

  3. 03

    Implementation

    Incremental build with visible progress and documented decisions.

  4. 04

    Testing

    Functional checks, failure paths, and acceptance criteria validation.

  5. 05

    Deployment

    Controlled release to staging and production with rollback paths.

  6. 06

    Handover

    Runbooks, access notes, and operator/admin walkthrough.

  7. 07

    Support

    Optional hypercare window or retainer continuity after go-live.

Custom engagement

Pricing depends on architecture, traffic profile, and integration depth. Share your requirements for a scoped quote.

Related work

Example / concept projects shown for illustration unless otherwise verified.

FAQ

Not by default. We map what you have, propose a target architecture, and migrate in stages so traffic stays stable.

Yes. We design around your interconnects and test failover paths before relying on them in production.

Ready to build?

Tell us about your environment, constraints, and target outcomes. We’ll recommend a package or a scoped quote.