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Value Range
• Outband
• Inband
Note
• If you select [Outband], DTMF tones will be sent through SDP
(Session Description Protocol), compliant with RFC 2833. If you
select [Inband], DTMF tones will be encoded in the RTP
stream.
Default Value Outband
Configuration File Reference OUTBANDDTMF_[1–8] (Page 174)
Telephone-event Payload Type
Description Specifies the RFC 2833 payload type for DTMF tones.
Note
• This setting is available only when [DTMF Type] is set to
[Outband].
Value Range 96–127
Default Value 101
Configuration File Reference TELEVENT_PTYPE_[1–8] (Page 174)
3.6.4.5 Call Hold
Supports RFC 2543 (c=0.0.0.0)
Description Selects whether to enable the RFC 2543 Call Hold feature on this line.
Value Range
• Yes
• No
Note
• If you select [Yes], the "c=0.0.0.0" syntax will be set in SDP
when sending a re-INVITE message to hold the call. If you
select [No], the "c=x.x.x.x" syntax will be set in SDP.
Default Value Yes
Configuration File Reference RFC2543_HOLD_ENABLE_[1–8] (Page 174)
3.6.4.6 CODEC Settings
First CODEC
Description Selects which codec to assign the highest priority to.
Document Version 2010.03.15 Administrator Guide 95
3.6.4 VoIP Settings [Line 1]–[Line 8]