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Alarm Landline to Cellular Backup Adapter - Automatically Switch to GSM When Line is Cut
Item #: STS-MONSWB
This device is used to detect when your physical landline telephone line is cut. When the device detects a phone line cut, (no voltage in the phone line), the device will automatically switch your alarm's landline phone connection to a backup phone source, such as a cellular communicator or dialer.
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Website Price: $34.95
Ebay/Amazon Price: $39.95 Save 13%
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