To ensure that the termination of voice traffic brings the desired profit, and the operation of the equipment is stable and does not depend on external factors, you need to take care of protecting expensive equipment from possible negative effects of low-quality voltage in the network. After all, the operation of VoIP equipment can be disrupted not only by malware but also by physical interference, which is not uncommon for power grids in some countries. These are voltage surges and dips, signal quality and stability violations, short circuits, etc. The negative consequences of their impact can be very different — from a short-term shutdown of the equipment (which is also not very pleasant, since it can lead to reputational and financial losses) to the failure of the equipment.
It is much more reasonable to buy devices for the protection and organization of uninterruptible power supply of equipment (UPS) than to be faced with the need for an unscheduled replacement of all VoIP equipment. Therefore, when operating gsm termination equipment, sooner or later there will be a question of ensuring a high-quality uninterrupted power supply.
We are all well aware that the quality of electricity networks in some countries leaves much to be desired. And such frequent phenomena as short-term failures, distortions, fluctuations, and power surges often lead to data loss or failure of VoIP equipment. To avoid these unpleasant situations, you need to get an uninterruptible power supply (UPS).