Telex Audiocom US-2002 User Instructions page 7

Features
Intercom Channel Connectors and Audiocom / Clear-Com
17.
channel for loop-through connection of multiple intercom stations. The selector switch sets the US2002 for compatibility
with either Audiocom or Clear-Com channel connector pin-outs, channel power requirements, and call signaling
requirements.
1. Brand names mentioned are the property of their respective companies.
1
Selector Switch - Two connectors are provided for each
5