Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
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inactive (for example, a=sendonly). The other is RFC 2543, which sets the “c” (connection addresses for
the media streams) in the SDP to zero (for example, c=0.0.0.0).
When you place an active call on hold or the call is held by remote parry, a call hold tone or held tone
alerts you after a specific period of time that a call is still on hold or is still held by remote party. You can
configure the call hold tone and held tone.
If supported by the server, you can also configure a music-on-hold URI.
Topics
Call Hold Configuration
Music on Hold (MoH) Configuration
Call Hold Configuration
The following table lists the parameters you can use to configure call hold.
It enables or disables the IP phone to use RFC 2543 (c=0.0.0.0) outgoing hold
signaling.
0-Disabled, SDP media direction attributes (such as a=sendonly) per RFC 3264 is used
when placing a call on hold.
1-Enabled, SDP media connection address c=0.0.0.0 per RFC 2543 is used when
placing a call on hold.
Features->General Information->RFC 2543 Hold
account.X.hold_use_inactive
[1]
It enables or disables the IP phone to use inactive outgoing hold signaling.
Note: It works only if “sip.rfc2543_hold" is set to 0 (Disabled).
0-Disabled, SDP media direction attribute “a=sendonly” is used when placing a call on
hold.
1-Enabled, SDP media direction attribute “a=inactive” is used when placing a call on
hold. RTP packets will not be sent or received.
features.play_hold_tone.enable
It enables or disables the IP phone to play the call hold tone when you place a call on
hold.
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