The boutique firm that keeps the world's networks talking - one signal at a time, across every generation of the phone in your pocket.
EXHIBIT A. The wordmark of a 79-person company whose code routes calls for more than half a billion strangers - none of whom will ever know its name.
Right now, somewhere, a phone call is crossing from one carrier's network to another. The voice doesn't notice the border. The text doesn't pause at customs. That seamlessness is not luck - it is signaling, the invisible traffic-control layer of telecom, and a small office in San Mateo has spent twenty-seven years making sure it never blinks.
teleSys Software does not make the apps you swipe or the handsets you upgrade. It makes the part nobody sees: the software that decides where a signal goes, how fast, and whether it's allowed in at all. SS7, SIGTRAN, Diameter, 5G SCP - to most people these are alphabet soup. To a network operator, they are the difference between a connected nation and a dead dial tone.
The company is deliberately small - around 79 people - and deliberately deep. Roughly three of every four employees work in research and development. It is less a sprawling vendor than a workshop of specialists who happen to keep the plumbing of global communication from leaking.
Before there was teleSys, there was a problem. In the 1980s and 90s, telecom signaling - the system that sets up, routes, and tears down every call - ran on rigid, expensive, proprietary hardware. Bobby Bahl knew it intimately; he had led the deployment of the first SS7 network in the United States at Sprint.
In 1997 he founded teleSys with a heretical idea for the era: signaling could be software. Open systems. High availability. Multi-protocol by design. Two years later, in 1999, teleSys delivered the first software-based, highly available signaling solution to AT&T Wireless - helping a Tier 1 carrier run SS7 signaling over IP when the rest of the industry was still bolting itself to bare metal.
The bet aged well. The boxes that once filled rooms became code that runs on commodity hardware, then on virtual machines, then in the cloud. teleSys rode every one of those transitions without asking its customers to drop a single call.
The product line carries the name MACH7 - a nod to speed, because signaling is fundamentally about routing traffic fast and without fail. Here is what an operator can actually do with it.
Routes and mediates signaling for 2G/3G/4G roaming, session management, and load balancing - the central switchboard for multi-generation networks.
Signaling Transfer Points (STP) and gateways that let HLRs, SCPs, MSCs, and SSPs talk to each other over legacy SS7 and modern IP networks alike.
Cloud-native Signaling Controller Proxy for 5G service-based architecture - intelligent routing for the newest generation of network.
Guards the signaling layer attackers love and operators forget - blocking fraud, protecting revenue, and adding security analytics.
Moves carriers off costly bare-metal infrastructure onto COTS and cloud, without service disruption.
Custom development, deployment, network migration, training, and customer care - the human layer on top of the software.
Figures are company-stated and approximate; bars scaled for illustration.
Bobby Bahl starts teleSys to bring open-systems, software-based signaling to telecom networks.
First software-based, highly available signaling solution shipped to AT&T Wireless - SS7 over IP, ahead of the field.
The MACH7 product family rolls out globally, connecting application platforms over IP networks for Tier 1 carriers.
Diameter Signaling Controllers and virtualization move operators from bare metal toward cloud-ready infrastructure.
5G SCP and signaling firewalls extend the platform into service-based architecture and signaling security.
teleSys sells to carriers - the Tier 1 and regional operators whose networks you rely on without ever reading their name. Its early flagship relationship was AT&T Wireless; today its software reaches more than 500 million subscribers through the major carriers.
Why does an invisible layer deserve a company this devoted? Because signaling is where calls succeed or fail, where roaming works or strands you abroad, and - increasingly - where fraud sneaks in. A signaling firewall stops attacks most subscribers never hear about. A cloud migration trims a carrier's costs without anyone noticing the move. The work is quiet by definition. When teleSys does its job, nothing happens, and that is the point.
In a market dominated by giants - the Oracles and Mavenirs and Ribbons of the world - teleSys competes on the opposite of scale: specificity. Standard products, learned to each customer's exact network. A workshop, not a warehouse.
That phone call from the opening - the one crossing silently from one network to another - is still connected. The voice still hasn't noticed the border. And it never will, because somewhere a small workshop in San Mateo has spent twenty-seven years making sure the seam doesn't show. teleSys didn't invent the call. It just made certain the call never has to think about how it arrived.
Contact: 1900 S Norfolk St, San Mateo, CA 94403 · +1 650-522-9922 · sales@telesys.com