Honeywell 85267270861 W8735D1009 Telephone Access Module, 2 Channels, Up to 18 Total Zones

The W8735D1009 Telephone Access Module (TAM) provides remote telephone access to the HVAC system when used with Envira
COM enabled controls it can be used in many different applications such as single- or multi-zone applications, conventional furnaces, and heat pump equipment.

Features:

Check the temperature in your home remotely using the telephone
Adjust your temperature settings remotely using the telephone
Monitor the temperature in your home, and if the temperature gets too hot or too cold, receive a telephone voice message
Check the indoor and outdoor temperature and Indoor humidity remotely using the telephone
Receive a message remotely when your furnace filter needs replacing
Receive notice when a detection is made from an optional auxiliary sensor
Receive a message alert remotely if your power is interrupted for an extended period of time
Name each zone from a prerecorded list

Specifications:

1/D, 2/R, 3/B (terminal connections per channel; two channels total)
Aux In 1, Aux In 2
Aux Out 1, Aux Out 2
Telephone
Power and Battery
Application: Remote dial-in/dial-out using a conventional telephone line. Two independent Envira
COM channels each capable of communicating with up to nine zones (up to 18 zones total).