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Global Call IP Technology Guide — November 2007 517
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IP-Specific Parameters
9.2.5 IPSET_DTMF
Table 47 shows the parameter IDs in the IPSET_DTMF parameter set. This parameter set is used to
set DTMF-related parameters for the notification, suppression or sending of DTMF digits.
This parameter set is not supported in SIP third party call control (3PCC) operating mode.
Table 47. IPSET_DTMF Parameter Set
Parameter IDs Data Type & Size Description
SIP/
H.323
IPPARM_
DTMF_ALPHANUMERIC
Type: IP_DTMF_DIGITS
Size: sizeof(
IP_DTMF_DIGITS)
Used when sending or receiving DTMF via
UII alphanumeric messages using the
Global Call extension API. The parameter
value contains an IP_DTMF_DIGITS
structure that includes the digit string.
H.323,
SIP
1PCC
IPPARM_
DTMF_RFC2833_
PAYLOAD_TYPE
Type: unsigned char
Size: sizeof(char)
Used to specify the RFC2833 RTP payload
type. Valid values are in the range from 96
to 127. The default value is
IP_USE_STANDARD_PAYLOADTYPE
(101).
H.323,
SIP
1PCC
IPPARM_
SUPPORT_DTMF_
BITMASK
Type: int
Size: sizeof(int)
Used to specify a bitmask that defines
which DTMF transmission methods are to
be supported.
Possible values are:
• IP_DTMF_TYPE_ALPHANUMERIC †
• IP_DTMF_TYPE_INBAND_RTP ‡
• IP_DTMF_TYPE_RFC_2833
H.323,
SIP
1PCC
† The IP_DTMF_TYPE_ALPHANUMERIC value, which is the default, is only valid when using H.323.
‡ The inband mode cannot be used reliably with low bit-rate coders.