Built by telecom engineers.
Trusted by revenue and support teams.
TechExtension builds AsterCTI: the CTI layer that connects Asterisk-based phone systems to the CRMs businesses already run on. Here's who we are, why we built it, and what we stand for.
A telephony company that also builds software — not the other way around.
TechExtension started with Asterisk deployments — configuring, tuning and supporting real production phone systems for businesses that couldn't afford downtime. AsterCTI grew directly out of that field experience: every integration decision reflects what actually breaks in a live call center, not just what looks good in a demo.
Asterisk Engineering
Hands-on expertise building and tuning Asterisk-based telephony from the dial plan up, not just configuring a GUI.
PBX Deployment
Production rollouts across FreePBX, Issabel, FusionPBX, VitalPBX and Elastix, on-premise or in the cloud.
CRM Integration
Connecting phone systems to the CRMs sales and support teams already rely on, without asking them to switch.
Enterprise Solutions
Architecture built for the uptime, security and scale enterprise buyers expect from day one.
Custom Development
Purpose-built modules and workflow logic for the moments an off-the-shelf integration isn't enough.
One product, built around one job: keep the phone and the CRM in sync.
AsterCTI isn't a general-purpose telephony toolkit — it does one job, and does it thoroughly.
What AsterCTI Is
A web-based computer telephony integration (CTI) layer that sits between your Asterisk-based PBX and your CRM, keeping calls and customer records in sync in real time.
Why We Built It
Every team we spoke with had built its own brittle bridge between telephony and CRM — a script here, a plugin there — each one breaking on the next upgrade. AsterCTI is that bridge, built once and maintained properly.
The Problem It Solves
Disconnected phone and CRM systems force agents to search for callers manually, log calls by hand, and lose context the moment they hang up — on every single interaction.
The Benefit It Delivers
Screen pops, click-to-call and automatic logging cut handle time and manual entry, while live analytics give managers visibility they never had before.
Our mission and vision.
Our Mission
To give every business, regardless of size or CRM choice, a direct and reliable line between the phone system that reaches customers and the CRM that remembers them — so no call ever loses context, and no agent ever has to choose between talking to a customer and finding their record.
Our Vision
A future where connecting telephony to business software is a configuration, not a project — where switching CRMs or upgrading a PBX never means rebuilding how your teams take calls. We want AsterCTI to be the layer businesses stop having to think about, because it simply works.
What makes AsterCTI the platform teams standardize on.
Six reasons IT and revenue leaders pick AsterCTI over a custom build.
Vendor-Neutral by Design
Not tied to a single CRM or PBX distribution — nine CRMs and six PBX platforms are supported today, with more added as the ecosystem grows.
Deployed in Days
Guided configuration gets a working integration live in hours, not the weeks a custom script usually takes.
Built for Scale
From a single support desk to a multi-tenant contact center running several CRMs at once, the same platform scales with you.
Security-First Architecture
Call data and CRM credentials stay under your control, deployed on-premise or inside your own cloud environment.
Transparent Operations
Every call, sync and disposition is visible in real-time dashboards — nothing about how your calls are handled is a black box.
Dedicated Onboarding
A TechExtension engineer configures your first integration alongside your team — not just a knowledge base article.
Works with the CRM your teams already know.
AsterCTI connects to nine CRM platforms out of the box — no need to standardize on one before you start.
Built for Asterisk, ready for its whole ecosystem.
Whichever Asterisk-based distribution runs your phone system today, AsterCTI connects to it directly.
Asterisk
The open-source engine AsterCTI is built natively around.
FreePBX
Drop-in module support for the most widely deployed PBX GUI.
Issabel PBX
Full compatibility with Issabel's unified communications stack.
FusionPBX
Multi-tenant ready integration for FusionPBX deployments.
VitalPBX
Real-time event syncing tuned for VitalPBX call flows.
Elastix
Legacy and active Elastix systems connect without re-platforming.
What we hold ourselves to on every deployment.
Integrity
We tell customers what AsterCTI can and can't do before they sign, not after.
Reliability
Uptime and call continuity aren't features — they're the baseline every deployment is held to.
Innovation
We invest in the parts of AsterCTI customers don't see yet: the next CRM, the next PBX, the next workflow.
Partnership
Every onboarding is treated as a long-term relationship, not a one-time install.
Customer-Centricity
Every item on our roadmap traces back to a real request from a real support or sales floor.
Simplicity
Telephony integration is complicated enough already. AsterCTI is built to hide that complexity, not add to it.
See how AsterCTI fits your stack.
Set up a working environment with your own PBX and CRM before you sign anything.