Best Gsm Alarm System

This 3G GSM cellular phone to landline wired phone adapter is a great mobile telephony solution for converting digital mobile phone signal to analog PSTN dial tone signal. The main applications for this product including: providing rural or remote areas that do not have landlines with phone jacks auto dialer with phone jack for hookup with phone-controlled devices connecting with security system or motion senor to call out for alarm-triggered events connecting with PBX system for call extension or office intercom [Note]: This device can only support T-Mobile and AT&T in USA. Verizon and Sprint networks are not supported by this device. For other countries, please consult with local cellular service carriers first. Full Compatibility With 3G WCDMA And GSM/GPRS Carriers This cellular phone to PSTN landline phone adapter supports worldwide WCDMA and GSM frequency as follows: 3G Tri-Band UMTS/HSDPA/HSUPA in the WCDMA frequency of 850/900/1900/2100 MHz 2G Quad-Band GSM in the frequency of 850/900/1800/1900Mhz Auto Dialer For Security Alarm System This device can also be used as phone dialer for alarm security systems with call-out functions when landline is failing or not available for the location. Private Telephone Network Or Intercom For Office When connecting this device with a PBX system, users can create a private phone exchange system for call extension or office intercom. Save Monthly Phone Bills No need to subscribe to regular landline service. You can put any pre-paid or unlocked SIM card into this telephony module as the dialer to make and receive phone calls. No Phone Line Cut-Off By Intruders Secure your alarm line by using cellular phone service and prevent the cut-off of phone line by intruders.