Introduction

Before we get into the depth of how a SIM box works, we need to understand what a SIM box actually is. And in the midst of it, we will also incorporate how it works as well. A SIM box which is also called a SIM bank is a hardware-based device used in telecom for the termination of direct GSM communication. The device holds a large number of SIM cards that depends upon the model and type of SIM box being used. The SIM cards are held separately from the GSM/VoIP gateways that results in lower expenses for maintenance and it also solves many other problems like blocking of SIM cards and many more.

A SIM box allows the operator to manage any number of SIM cards they can handle. The SIM box allows for a multitude of SIM cards belonging to different service providers to be installed in a single device which allows the operator to access many GSM gateways that are all placed at different locations, even countries. The amount of SIM cards is independent of an upper limit as several SIM boxes can be connected to a single system.

As we have mentioned, the SIM cards can be kept away from the GSM gateway which allows for a separate SIM card to be attached for GSM/VoIP module that reduces the chances of the SIM card from getting blocked by enables the exact same card to call from different locations.

The placement of SIM cards separately from the GSM modules requires high quality and high-speed internet that must be proportional to the distance. A strong internet connection must be present between the SIM box and the GSM gateway to enable the VoIP gateway to work.

SIM box allows for the placement of SIM cards that partake in the termination of the traffic (whether voice or SMS based) over a wide range of locations in a single device, thus it becomes easy for the operator to manage them. it is highly imperative that there are multiple GSM gateways placed in different locations whether domestic or even international. But the SIM-cards involved in the whole operation can be placed in a single SIM box or even multiple SIM boxes all connected to a single system at one location.

Additionally, the SIM box provides a number of benefits pertaining to the load put on each SIM card, management of the load, and utilization of migration strategy to prevent SIM cards from getting detected and blocked. These benefits or strategies can be either algorithm based or simply hardware based which allow the operator for better management of all the SIM cards from a single location.

One such benefit is called the rotation of the SIM cards. This advantage that comes along with the SIM box helps in the effective optimization of all the SIM cards by dividing them into groups. This allows to connect each group to a separate GSM module of a VoIP gateway. The system is then able to make changes within each group and jumping the responsibilities from one group to another and even from individual SIM cards. in this way, an operator can not only better manage the resources at hand with increased efficiency, but the resources consumed by each individual SIM cards is reduced as well. it also helps in mitigation of workload and as a result, helps in eliminating any possible suspicion the network provider may have.

Moreover, another strategy which is called Migration of the SIM cards jumps the registration of the SIM cards on different GSM modules with a specific frequency. With multiple GSM gateways located throughout a location (a city or town), the system can create an illusion of a real user’s movement by showing the call being conducted from different gateways. The most important benefit of this advantage is that it helps in the prevention of a SIM card from being blocked by the service provides.

Ultimately, a SIM box or a SIM bank serves a highly beneficial purpose of terminating the original GSM communication which enables the users to be able to cut on high fees charged by the service providers. Think of it as a ride on the back of the internet to connect to the destination or intended recipient.