For optimal operation of monitoring station is recommended to use three GSM-modem - two (main  and reserve) to receive messages and one for free connection test. A transfer messages from one object to the CSD channel is about 25 c.
     Thus, while the highest load (approximately 1 hour in the morning and at night), the monitoring station can serve 300 objects. The variant of the organization of monitoring station with the using of  two main GSM - modems and test connection, but it is not recommended, because  the peak time 300  objects of service will be doubled.
When we use the maximum number of GSM - modem for an hour, maximum load monitoring station can serve about 1,500 objects.
       The work in the protocol "Globus" provides commercially available devices, such as SCP "Orion-1TK", SCP "Orion 4T.3.1", SCP "Orion 8T.3.1", SCP "Orion 16T.3.1" and SCP "Orion 4DM.1."