Stable cellular communication in the country or in a country house greatly simplifies the protection of buildings by technical means. A CCTV camera with a SIM card will instantly transmit information about the penetration of intruders to any part of the planet. The equipment is selected based on the characteristics of the object. Installation and setup is no more difficult than using a smartphone.
GSM Surveillance Limitations
Modern video cameras in most cases produce a picture with the number of pixels (individual image points) 1920x1080, which is close to the 2MP resolution.
Equipment with such parameters creates a traffic of 15 Mb / min when transmitting streaming video. Per day, depending on the set mode, the total amount of transferred information will be from 10 to 20 GB, and per month from 300 to 600 GB.
Cellular operators rarely offer tariffs with such an Internet limit or demand from 1000 rubles per month for use.
On the other hand, there is no need to receive and view an image from a remote home around the clock. A camera equipped with a motion sensor will start recording and transmit a signal exactly at the moment of penetration, which is enough for a response.
Use cases and available information
Often, the only way to quickly obtain information from remote sites is the networks of cellular operators.
The situation is typical for suburban settlements, small settlements and separately located country houses.
GSM CCTV cameras with a SIM card for home or summer cottages continuously monitor the situation on the street, in the interior and in the premises. In the event of the appearance of unauthorized persons or technicians, they can give the owner the following types of information:
- SMS-message about detection of signs of movement in the area of coverage of the lens. On a signal, the property owner can watch the events taking place.
- MMS message in the form of a single frame or a short video clip. Recording is triggered by a signal from a video camera motion sensor or when a burglar alarm device is triggered.
For cameras connected to the Internet, the owner of the equipment can turn on the broadcast in real time at any time. For example, to see what children, pets, or hired workers are doing.
Some mobile cameras are equipped with a memory card slot. The archive is available for viewing at any time.
Camcorder manufacturers and Internet providers provide cloud storage services and access to registered users for free or for a small fee.
In GPRS, GSM, 2G networks, the main function is to view still frames or short fragments. To receive video in real time, a 3G or 4G connection is required.
GSM video surveillance allows you to control dome and PTZ cameras, adjust focus, zoom in or out. Devices can be included in a single “smart home” system.
Equipment composition and connection options
Depending on the goals, site configuration and house layout, autonomous video surveillance systems of different structure are used.
Video camera with GSM module
In the simplest version, one analog camera with a built-in device for connecting to a cellular network is used - the electronic circuit provides a place for installing a SIM card.
No internet connection is required when using this type of equipment.
When motion is detected, the user receives an SMS notification of an "alarm" or MMS with a photo of the events taking place. The control signal is generated by software or remote motion sensors.
There is a mode of receiving an image by SMS request or according to a predetermined schedule.
Using the base module
When it is required to receive information from several devices, specialized GSM modules are used.
The device has a separate input and detection sensor for each camera. With the help of microphones “attached” to the camera, audio information is listened to.
The large amount of information received does not allow establishing a full-fledged broadcast. The device operation algorithm provides for traffic information and freeze frames transmission to the user's phone.
During programming, it is possible to bind several phone numbers where messages and videos will be received. Mandatory viewing function upon request of the owner at any time.
IP Cameras
- Information is continuously recorded on the built-in or external memory card, which allows broadcasting even with poor quality wireless communication.
- Manual fine tuning of hardware, built-in or external motion detection prevents false messages caused by pets in the detection area.
- The inclusion of infrared illumination is electronically controlled, which saves energy consumption. This is important when using redundant power supplies.
- Through speakers and a microphone, two-way communication is carried out between the user and people who are near the video camera.
Well-known brands provide cloud storage services. To connect, just enter the serial number or MAC address of the camcorder.
Important characteristics
When choosing equipment, they take into account the important parameters of video cameras:
- Operating conditions. Outdoor devices are provided with: protective covers against precipitation and dust, heating of the electronic circuit and protective glass of the lens, sun visors.
- Supported transmission technology: ММS - for photos and short videos, GPRS (2G, 3G, 4G) - for watching videos.
- Angle of view depending on the focal length. The larger the angle, the less detail is seen.
- Image quality (resolution). With high quality, the picture allows you to see the details, but the transfer process slows down due to the large amount of information.
- Lens type and focal length. Fixed always "sees" in one version. Adjustable allows you to manually adjust the image based on the characteristics of the subject, which can be useful when moving the camera to another room.
- PTZ technology allows for remote focus adjustment, image zoom, camera rotation in different planes.
- The presence of a built-in infrared illumination for shooting in the dark, its power and software control of the inclusion.
Good performance cameras lose all the benefits in the event of an unstable cellular connection. Do not overpay for additional features that cannot be implemented in practice.
Installation features
Installation of remote video surveillance with cameras equipped with sim cards is available to any user.It is important to consider a few nuances:
- The cellular operator is selected based on the cost of services (tariffs), as well as on the quality indicators of communication at the place of installation of the equipment.
- Pay attention to the signal level at different points of the room (land plot). You can navigate by the indication of the cell phone (the number of lines at the antenna). Choose the best place.
- If necessary, install an external antenna or cellular signal amplifiers - this will improve the quality of communication.
- They purchase and connect an uninterruptible power supply if the power supply is often cut off in the village.
- The lens cannot be directed towards the direction of the sun's movement along the horizon. It is taken into account that at different times of the year the light comes from different angles, and possible flares will not allow you to get a high-quality picture.
- In rooms, the camera is mounted on walls with windows, aiming the lens towards the interior of the room.
- In the case of using a GSM module, the wires from the cameras should be routed no closer than 15 cm from the mains.
IP devices will require special applications for operation, which are available on the manufacturer's website.
Popular manufacturers
Surveillance cameras with a built-in SIM card are present in the lines of all equipment manufacturers. When choosing, they are guided by the necessary functionality, price and customer reviews.
Among the brands, they stand out for quality and characteristics:
- BEWARD, Russia. Produces a full range of video surveillance equipment. The BEWARD CD630-4G model is designed for indoor and outdoor installation, equipped with IR illumination (up to 25 m), noise reduction, dynamic sensitivity adjustment.
- Zodikam, Russia. The Zodikam 202 camera is installed outdoors or indoors, the minimum temperature is -30 ° C, IR illumination up to 30 m.
- KARKAM, Russia. KAM-004G, illumination distance 50 m, outdoor version.
- SimPal-G312 camera, China. Sends a photo from an object to e-mail upon request, when a motion sensor or any other connected security device is triggered. Camera SimPal-G4 - by an alarm signal, a call is made, an SMS or a message is sent to the mail.
- Guard MMC Micro (Russia) is designed for small rooms, the sensor response range is 5 meters.
Choosing CCTV cameras with the ability to transmit a signal in cellular networks is a reliable way to increase the security of remote objects. Installation and configuration does not require experience with digital devices. The range of leading manufacturers is wide and allows you to create systems of any complexity.
