The GGT-1F is a DTMF (Dual-Tone Multi-Frequency) decoder field installation kit designed for use with Callbox XT models. This decoder board enables the callbox to receive and respond to DTMF tones sent from compatible two-way radios, enhancing remote access and control capabilities.
The GGT-1F is a factory-installed upgrade and cannot be retrofitted in the field. To ensure proper installation, it must be purchased alongside the Callbox XT unit.
For reliable DTMF-controlled communication and access management, the GGT-1F is an essential addition to your Callbox XT system.
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