snippet: 3 Wire APT Amplifire/Power Supply Use with HT2001 SER. Handsets Requires T1240 Transformer (Use TU1007A/M for Dual-Entr.). The Alpha Communications® NH201TVA-2 power supply is used with the HT3000 and HT2000 series handset stations to provide intercom amplification and power to operate the associated intercom system, and certain optional components and/or accessories, such as electric door opener(s) etc.

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