01
Texts And Flash SMS
Send standard SMS and flash SMS through your modem lines, including on campaigns. Messages use the SIMs you already have, routed through your own hardware.
What You Get
02
USSD Requests
Run carrier USSD codes from the USSD tab on a line that supports them. USSD may need 2G or 3G fallback, or USSD over IMS support on the carrier.
03
Calls On Voice Lines
On lines that report voice capability, agents answer and place calls in the Messenger. Call flows can answer incoming calls, play prompts, record and transfer to an agent.
04
Per Site Modem App
Build a branded Modem App for your site in your buyer dashboard for Windows, Linux x64 or Linux ARM64. It runs on the computer that hosts your modems and pairs with a code.
05
Telephony Server Included
The download includes the telephony server for Linux x86-64 and Linux ARM64. Register several servers: devices go to the least loaded one and move off a disabled server. The same service also supports Phone Bridge.
06
Plan Control And Readiness
Enable GSM Modems and set limits per plan. Voice needs GSM Modem Calling on the plan, and each line shows its readiness so you know what it can do.
How It Works
Install The Plugin
Extract your downloaded ZIP, upload plugin.zip in Admin > Plugins, activate GSM Modems, save its settings and enable it on eligible plans.
Set Up Server And App
Run the telephony server on a Linux VPS and register it in Admin. Build the Modem App in your buyer dashboard, then upload it in the plugin Configure page.
Pair And Send
Install the app on the computer with your modems, connect through Channels, pair with the eight-character code and check each line readiness.
Requirements
- Zender 5.0 or later with channel plugin support
- A Linux VPS for the telephony server
- A computer that stays online with supported GSM modems and active SIMs
- GSM Modems enabled on the plan
- GSM Modem Calling on the plan for voice
- Zender server: PHP 8.4 or later
Frequently Asked Questions
What is GSM Modems Plugin for Zender?
GSM Modems Plugin for Zender is a paid channel plugin for Zender that sends texts, flash SMS and USSD through GSM modem lines and supports calls on voice-capable lines.
Is the Modem App a mobile app?
No. GSM Modems uses a daemon app that runs on the computer connected to your modems, built for Windows, Linux x64 or Linux ARM64. It is not an Android APK. You build it per site in your buyer dashboard.
Does it include the source code of the Modem App?
No. The source code of the Modem App is not included. To brand or customize the app, use the Modem App builder in your buyer dashboard, which provides per-site builds.
Do I need a VPS?
Yes. The telephony server runs on a Linux VPS, and the download includes binaries for x86-64 and ARM64. The Modem App runs separately on the computer that keeps the modems online.
Which GSM modems are supported?
The SIM7600G-H handles LTE texts, flash SMS, USSD and call detection, with calling on lines that report voice capability. The SIM800C is SMS only in the app and works on 2G networks only. The A7670 and EG25-G are not supported profiles today. Check network availability and your exact SIM, firmware and carrier before buying.
Do Extended license holders get a discount?
Yes. Zender Extended license holders buy this plugin at a reduced price. With a Regular license, it is sold at the price shown on this page.
Do I need Zender to use it?
GSM Modems Plugin for Zender is an add-on for Zender and requires a Zender 5 installation. The requirements are listed on this page.
How do I get GSM Modems Plugin for Zender after buying?
After buying, sign in at https://dashboard.titansys.dev with the Envato login button to download it and get support.