The original intercom KTUs, WECo Model 207, were wired for …
The original intercom KTUs, WECo Model 207, were wired for a single talk link, that is, a single conversation on the intercom at a time.
The original intercom KTUs, WECo Model 207, were wired for a single talk link, that is, a single conversation on the intercom at a time.