IT-2000 uses an integrated GSM module that simulates a traditional telephone line (PSTN). It can be used in case PSTN line is not available or as a system of “backup” phone. It can monitor the PSTN line 24h/24 and automatically switch to GSM network. In addition, it can handle digital protocols CONTACT ID, and so on. The system can generate a high voltage ring (phone ringing) when receiving a call on the GSM line. Equipped with a control system via SMS on the interface itself: life test, backup battery, GSM power signal, PSTN line failure, automatic sms text message sending to selected phone numbers (i.e. SIM credit, SIM expiration), system status. Dimensions: W 260, H 200, D 45 mm.