The hotel's "ingenious call system" connected guest rooms to the main office; bells could be remotely rung using electrical current.
Bells could be remotely rung using electrical current. The hotel's "ingenious call system" connected guest rooms to the main office.
The hotel's "ingenious call system" connected guest rooms to the main office. Bells could be remotely rung using electrical current.
The hotel's "ingenious call system" connected guest rooms to the main office. Bells could be remotely rung using electrical current.