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Understanding Line and Call Icons
Your phone displays icons to help you determine the call and line state (on-hook, on hold, ringing,
connected, and so on).
Understanding Feature Availability
Depending on your phone system configuration, features included in this Phone Guide might not be
available to you or might work differently on your phone. Contact your support desk or system
administrator for information about feature operation or availability.
Understanding SIP vs. SCCP
Your phone can be configured to work with one of two signaling protocols: SIP (Session Initiation
Protocol) or SCCP (Skinny Call Control Protocol). Your system administrator determines this
configuration.
Phone features can vary depending on the protocol. This Phone Guide indicates which features are
protocol-specific. To learn which protocol your phone is using, you can ask your system administrator
or you can choose > Model Information > Call Control Protocol on your phone.
Icon Call or line state Description
On-hook line No call activity on this line.
Off-hook line You are dialing a number or an outgoing call is ringing.
Connected call You are connected to the other party.
Ringing call A call is ringing on your line.
Call on hold You have put this call on hold. See Using Hold and Resume, page 16.
Remote-in-use Another phone that shares your line has a connected call. See
Understanding Shared Lines, page 26.
Authenticated call See Making and Receiving Secure Calls, page 28.
Encrypted call See Making and Receiving Secure Calls, page 28.
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