Nortel Networks Nortel IP Phone 1110 - Manual (Page 84)

Additional phone features
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Figure 10: Office phone displays the message Logged Out
When activated for Virtual Office by a Remote telephone, your Office
telephone is logged out and no longer operational. If this is the case when
you return to your office, you can disconnect the remote login and regain
control of your Office phone. If you do not disconnect the remote login,
your Virtual Office session expires after a fixed period of time, determined
by your system administrator.