Version 6.8 313 Mediant 2600 E-SBC
User's Manual 19. Coders and Profiles
Parameter Description
Adapt RFC2833 BW to Voice
coder
BWsbc-adapt-rfc2833-bw-
voice-bw
[IpProfile_SBCAdaptRFC2833B
WToVoiceCoderBW]
Defines the 'telephone-event' type (8000 or 16000) in the SDP that
the device sends in the outgoing SIP 200 OK message for DTMF
payload negotiation (sampling rate).
[0] Disable = (Default) The device always sends the 'telephone-
event' as 8000 in the outgoing SIP 200 OK, even if the SDP of
the incoming INVITE contains multiple telephone-event types
(e.g., 8000 and 16000).
[1] Enable = The type of 'telephone-event' that the device sends
in the outgoing SIP 200 OK message is according to the coder
type (narrowband or wideband). If narrowband, it sends the
'telephone-event' as 8000; if wideband, it sends it as 16000.
An example when the parameter is configured to Enable is shown
below, whereby the 'telephone-event' is "16000" in the outgoing
message due to the wideband coder:
SDP in incoming INVITE:
a=rtpmap:97 AMR-WB/16000/1
a=fmtp:97 mode-change-capability=2
a=rtpmap:98 AMR-WB/16000/1
a=fmtp:98 octet-align=1; mode-change-capability=2
a=rtpmap:100 AMR/8000/1
a=fmtp:100 mode-change-capability=2
a=rtpmap:99 telephone-event/16000/1
a=fmtp:99 0-15
a=rtpmap:102 telephone-event/8000/1
a=fmtp:102 0-15
SDP in outgoing 200 OK:
m=audio 6370 RTP/AVP 97 99
a=rtpmap:99 telephone-event/16000/1
a=fmtp:99 0-15
a=sendrecv
a=ptime:20
a=maxptime:120
a=rtpmap:97 AMR-WB/16000
a=fmtp:97 mode-change-capability=2;mode-set=0,1,2,3,4,5,6,7,
Web: SDP Ptime Answer
CLI: sbc-sdp-ptime-ans
[IpProfile_SBCSDPPtimeAnswe
r]
Defines the packetization time (ptime) of the coder in RTP packets
for this SIP entity. This is useful when implementing transrating.
[0] Remote Answer (Default) = Use ptime according to SDP
answer.
[1] Original Offer = Use ptime according to SDP offer.
[2] Preferred Value= Use the ptime according to the 'Preferred
Ptime' parameter (see below) if it is configured to a non-zero
value.
Note: Regardless of the settings of this parameter, if a non-zero
value is configured for the 'Preferred Ptime' parameter (see below),
it is used as the ptime in the SDP offer.
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