Security integrators · camera makers · monitoring centers

The alert reaches a person.
From a real mobile number.

When a camera or a sensor flags something, the people responsible for that site get a text or a call from a real US mobile number, not a short code they ignore. The monitoring center makes the police call. We supply the lines, over an API, plus US data lines for the devices themselves.

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Two things we supply

Nothing here is a camera or an analytics engine. You have those. This is the connectivity and the number behind them.

Alert lines

A real mobile number per site, per operator or per product

A T-Mobile number held in our gateway and driven by your platform.

  • Outbound text with one REST call: "Motion at the north gate, 02:14, clip attached" to the site manager, the guard on shift, the owner.
  • Outbound call over SIP: your platform or your voice agent calls the person, with the number as caller ID. Trunk mode works with voice-agent platforms without a PBX.
  • Inbound: replies and calls come back to the same number, to your webhook or your SIP endpoint. "Yes, I am on my way" lands in your system.
  • Built for one-to-one notices to the handful of people responsible for a site, which is why they get delivered and answered.
Device lines

US data for cameras, gateways and sensors

Data lines on US networks for the devices that cannot sit on the customer's Wi-Fi.

  • SIM cards and eSIM profiles, activated by API or from a dashboard, one per device.
  • Monthly plans, and plans by the day for short deployments, construction sites and events.
  • Tell us the device and the expected traffic and we match the plan; a camera streaming clips is a different line from a sensor pinging once an hour.
  • Dealer pricing, your own wallet, the same API as the alert lines.
Where the line stops. An alert line is not a 911 path and not a fire or life-safety signaling channel: 911 and the N11 numbers are blocked on every line, and a dispatch center takes calls from people and from monitoring centers, not from machines. The line carries the alert to the people who decide; the monitoring center or the site contact makes the emergency call. One line sends one-to-one notices to the people responsible for a site, with a monthly allowance per number; the same text to a long list is campaign traffic, which carriers drop and which the line refuses. Lines used for unsolicited calls or texts are blocked the moment we see it.

How it fits your platform

Your analytics decide what matters. The line carries the decision to a human and brings the answer back.

# 1. Your platform flags an event and texts the site contact from the site's own number POST /api/v1/sms/lines/3105550123/send { "to": "3105559876", "message": "North gate, 02:14: person on foot, clip: https://your.app/c/8f2k" } # 2. The reply arrives at your webhook within seconds { "number": "3105550123", "from": "3105559876", "text": "On my way, 10 min", "received_at": "2026-10-21T02:15:09Z" } # 3. For a call: your voice agent dials over SIP, the contact sees the site's number INVITE sip:3105559876@sip.meisimusa.com # digest login per line, no PBX
Monitoring centers

A number the customer recognizes

Each account or each site gets its own number. Operators text and call from it; the customer's phone shows the same number every time and saves it. Replies come back into the operator's queue through the webhook.

Camera and sensor makers

Connectivity in the box

A data line per device, activated when the device is provisioned, billed to you at dealer prices, with the alert line as an upsell your app can switch on per customer.

Integrators

One API for the fleet

Order lines, read messages, set webhooks, renew or stop per line, all from one key. Numbers are rented by the month and released when a site closes.

Voice agents

The call a person answers

An agent that calls the site contact, confirms what the camera saw and logs the answer. Trunk mode connects voice-agent platforms directly to the line.

Pricing

Alert lines are the same lines we sell for AI agents: $35 a month for texts, $45 with voice, prepaid, no contract, added and dropped as sites come and go. Device data lines are priced per plan; ask with the device type and the expected traffic.

Texts

$35 per number a month. Texts in at your webhook, texts out with one call, a monthly allowance per number.

Voice and texts

$45 per number a month. Everything above, plus calls in and out over SIP with the number as caller ID, one call at a time per line.

Every account agrees to the API and lines terms: one-to-one use, no bulk traffic, KYC on every buyer.

Questions integrators ask

Can the line call 911 when the camera sees a crime?

No, and no line should. 911 and the other N11 numbers are blocked on every line. Dispatch centers take calls from people and from licensed monitoring centers with a human verifying first; an automated call is refused and false alarms are fined. The line carries the alert to your center or to the site contact, who makes the call.

Can one line alert everyone on a site list?

A line sends one-to-one notices to the few people responsible for a site. The same text to a long list is campaign traffic: carriers filter it silently, and the line refuses it. If you need to reach hundreds of recipients at once, that is an application-to-person channel, not a mobile line.

Is there a delivery receipt?

No. A mobile line has none. The answer to a send is "accepted by the carrier"; the way to know the person got it is their reply, which lands at your webhook.

What about the data lines for devices?

SIM cards and eSIM profiles on US networks, monthly or by the day, activated by API. We match the plan to the device and its traffic. Tell us the model and the expected clips per day.

Who is the customer here?

You: the integrator, the camera maker or the monitoring center. You hold the customer relationship, the contracts and the procedures; we supply lines that work and an API.

Run one site on it this week

Tell us the platform and the device, and we set up one alert line and one data line to run next to what you use now.

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