Concurrency Count for PBXact and FreePBX®

20tele.com has developed Concurrency Count, a free and open-source Bash script that reveals historical call concurrency to the second for SIP trunks, extensions, and groups on Asterisk-based FreePBX and PBXact systems. It automatically discovers live endpoints, queries CDRs, calculates overlapping calls, and reports true peak loads over any chosen period.

For fifteen years, users of FreePBX have publicly expressed a lack of visibility around true channel usage. Actual call concurrency has never been tracked, leaving organisations to guess at peak loads and overprovision SIP trunks to avoid dropped calls.

“No more guesswork or hidden costs,” said Kieran Byrne, MD [Product] at 20tele. “Concurrency Count blows open the silence around channel usage. It exposes exactly how many simultaneous calls you actually used and lays bare the oversubscription you’ve been paying for.”

Per-channel charges remain widespread across SIP trunk providers, with costs typically ranging from £20 to £40 per channel each month in the UK. Many providers rely on oversubscriptions to maintain profit margins, assuming their customers will never reach the full allocation. Telecoms industry sources openly describe the pricing model as a means to facilitate oversubscription and provider profitability, while telecoms professionals have long debated the value of switching to usage-based pricing to avoid unnecessary fees.

“It’s been designed to suit everyone from FreePBX rookies through to experienced sysadmins,” added Sam Knowles, MD [Service] at 20tele. “Intuitive prompts, forgiving inputs and heartbeat-style status updates guide you smoothly through vast CDR volumes so you always know it’s working.”

Concurrency Count runs in seconds with zero configuration, supports custom dates and requires only Bash 4+, MySQL, and standard Unix tools. It is compatible with Asterisk 18, 20, 22 on both FreePBX and PBXact using PJSIP.

Deliberately disruptive by design, this simple tool is the first community-driven solution of its kind to be released at scale. For providers still charging per-channel, the conversation has changed.

Concurrency Count is available under the GNU General Public Licence v3 from 1 July 2025 at https://github.com/20telecom/concurrency-count

20tele is a UK-based telecoms provider and Sangoma Gold Partner for hosting, licensing, migrations, upgrades, training, support and maintenance of FreePBX and PBXact phone systems alongside fibre broadband, call answering, and podcast streaming. 20tele has worked with hundreds of businesses, charities, high-net-worth individuals, and preferred supplier for ICT Services to the public sector.

FreePBX and PBXact power over a million business phone systems worldwide, combining open-source flexibility with powerful commercial features and long-term support.

Видео Concurrency Count for PBXact and FreePBX® канала 20telecom