VoIP Detective vs. Cisco CAR
Cisco’s built-in CDR Analysis and Reporting (CAR) tool is free and already sitting inside your CUCM — but most teams quickly run into its limits on retention, readability, and who’s allowed to use it. VoIP Detective does the same core job, only easier, for more people, across more platforms — and it’s also free to start.
Last updated: June 2026
The short version
CAR is fine for an administrator who needs the occasional lookup or a basic traffic or billing report. The moment you need readable reports, data older than a few months, reports that managers or end users can run themselves, or anything beyond CUCM, you’ve outgrown it. VoIP Detective covers those gaps — and because the Lite version is free forever, you don’t have to spend anything to do better than CAR.
What Cisco CAR is — and where it’s fine
CAR (CDR Analysis and Reporting) is the reporting tool built into Cisco Unified Communications Manager, reached through Cisco Unified Serviceability. It reads the Call Detail Records that CUCM already produces and generates reports on quality of service, traffic, user call volume, billing, and gateways. It’s included at no cost, it’s already installed, and for a CUCM administrator who needs an occasional record lookup or a basic traffic report, it gets the job done.
Where teams outgrow CAR is almost everything beyond that occasional admin task — and that’s the gap VoIP Detective was built to fill.
VoIP Detective vs. Cisco CAR at a glance
| VoIP Detective | Cisco CAR (built-in) | |
|---|---|---|
| Cost | Free Lite tier; $1,499/year Pro | Free (included with CUCM) |
| Who can run reports | Admins, managers, and end users — each with their own self-service access | Administrators only, inside Cisco Serviceability |
| Ease of use | Clean, readable reports and fast search; no training needed | Functional but dated; reports are widely considered hard to read |
| Dashboards & visualization | Interactive graphs, an at-a-glance dashboard, and click-through drill-down | Mostly static, predefined report output |
| Data retention | Lite: 7 days | Pro: no time or retention limit (millions of records) | Fixed-size database; typically only a few months before oldest records auto-purge |
| Platforms covered | Cisco CUCM, CUBE, Webex Calling, Microsoft Teams | Cisco CUCM only |
| Scheduled email reports | Yes (Pro) — any report, emailed to managers, end users, or anyone you choose | Predefined reports can be emailed to CAR administrators only; admin-configured and off by default |
| Call-quality troubleshooting | Network Quality report — search by jitter, latency, or packet loss | Underlying CMR data exists, but limited dedicated reporting |
| Hunt group & shared-line reporting | Shows who answered, plus unanswered, abandoned, and voicemail calls — out of the box | No clean built-in report of who answered; needs CDR service-parameter changes and manual analysis |
| Emergency / 911 call alerts | Yes (Pro) | No |
| Number masking / GDPR | Yes (Pro) | No |
| Export formats | Lite: CSV | Pro: CSV, XLSX, PDF | CSV and PDF |
| License reclamation | Endpoint Utilization report flags unused devices | Not provided |
| Deployment | Self-hosted VM (VMware, Nutanix, Proxmox, Hyper-V, or Linux KVM) | Built in to CUCM (activate the CAR services) |
Reports that go beyond what CAR offers
A few VoIP Detective reports tend to be the reason admins stop opening CAR:
Team Report CUCM · WEBEX · TEAMS
A clean, high-level summary of calls to and from everyone on a team, run by the manager themselves — no admin access, no Serviceability, no training. CAR has no equivalent that a non-administrator can use.
Network Quality Report CUCM
Search calls by jitter, latency, or packet loss to pinpoint the devices and network segments behind poor-quality calls — turning “audio is choppy” into a specific, fixable list, rather than digging through raw CMR data.
Inbound Call Report CUCM · WEBEX · TEAMS
Run it for an extension, hunt group, shared line, or call-pickup group and see not just the calls, but which user actually answered — plus the calls that went unanswered, abandoned, or to voicemail. Pulling the answering member out of CUCM’s raw CDRs otherwise means changing service parameters and stitching records together by hand; here it’s a single readable report.
Endpoint Utilization Report CUCM
Compare every device configured in CUCM against actual call activity to see which haven’t placed a call recently, so you can reclaim unused licenses — a tangible saving CAR simply doesn’t surface.
The full set also includes Administrator, All Calls, Busy Hour, Outbound, Client Matter Code, Gateway Utilization, Range Summary (search a whole number pattern like 4XXXX in one report), and Total System Usage reports, plus CUBE analytics. Lite exports to CSV; Pro adds XLSX and PDF with scheduled email delivery.
Two honest ways to read this
When CAR is enough
- You only need occasional, admin-run lookups.
- You rarely need data older than a couple of months.
- You’re comfortable with reports that only an administrator runs and reads.
- CUCM is your only platform — no Webex, Teams, or CUBE to report on.
- You’d rather not deploy anything else at all, even something free.
When VoIP Detective is the better choice
- You want managers and end users to run their own reports.
- You need to keep call history well beyond CAR’s few-month window.
- You want readable reports and fast search without training anyone.
- You want managers to schedule their own reports, or need 911 alerts or GDPR masking.
- You report across Webex, Teams, or CUBE too — not just CUCM.
- You want near-real-time data, not just yesterday’s.
- It’s free to start, so it costs nothing to do better than CAR.
Frequently asked questions
- Does VoIP Detective replace Cisco CAR?
- It can be your everyday call-reporting tool. CUCM still generates the Call Detail Records; you simply configure CUCM to send those records to VoIP Detective as a billing/CDR destination — the same kind of mechanism CAR relies on. Most teams keep CAR available but stop using it day to day.
- Is VoIP Detective really free, like CAR?
- Yes. The Lite version is free forever, with no time limit and no device cap. So you can run easier, more readable reports than CAR without spending anything. Pro ($1,499/year) adds unlimited retention, scheduled reports, emergency-call alerts, GDPR masking, and more.
- How far back can I report, compared with CAR?
- CAR’s database is a fixed size and typically holds only a few months of data before the oldest records are purged automatically. VoIP Detective Pro has no time or retention limit and stores millions of records, so you keep long-term history for trend analysis and compliance.
- Can people other than administrators run reports?
- Yes — that’s one of the biggest differences. CAR is an administrator tool inside Cisco Serviceability. VoIP Detective lets managers run reports on their teams and lets end users pull their own call history, with permissions you control.
- Does it produce contact-center or agent reports like CUIC?
- No — that’s the domain of Cisco’s contact-center tools (UCCX with CUIC). VoIP Detective focuses on call reporting across CUCM, CUBE, Webex Calling, and Microsoft Teams, and includes a live UCCX wallboard for real-time queue visibility.
- What does it cover beyond CUCM?
- CAR reports on CUCM only. VoIP Detective also reports on Cisco CUBE, Webex Calling, and Microsoft Teams from the same deployment, which helps if you run a mix of platforms or are migrating between them.
Run better reports than CAR — for free
Download the free Lite version, point CUCM at it, and see your call data in a way CAR never showed you. No cost, no sales call.
A note on accuracy: Cisco CAR’s behavior (retention, loading frequency, available reports) can differ by CUCM version and configuration. The comparison above reflects typical CAR defaults; check your own CUCM settings for specifics.