Answering and making calls, When you hear outside ringing (two long bursts), When you hear intercom ringing (two short bursts) – Vertical Communications GCA70-248 User Manual
Answering and making calls, When you hear outside ringing (two long bursts), When you hear intercom ringing (two short bursts) | Vertical Communications GCA70-248 User Manual | Page 12 / 92
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