AudioCodes MediaPack MP-108 User Manual page 64

Table 5-4: DTMF & Dialing Parameters (continues on pages 63 to 65)
Parameter
Use Out-of-Band DTMF
[IsDTMFUsed]
Out-of-Band DTMF Format
[OutOfBandDTMFFormat]
Declare RFC 2833 in SDP
[RxDTMFOption]
DTMF RFC 2833 Negotiation
[TxDTMFOption]
RFC 2833 Payload Type
[RFC2833PayloadType]
Use INFO for Hook-Flash
[IsHookFlashUsed]
MediaPack SIP User's Manual
Description
Use out-of-band signaling to relay DTMF digits.
No [0] = DTMF digits are sent in-band (default).
Yes [1] = DTMF digits are sent out-of-band according to the parameter 'Out-of-band
DTMF format'.
Note: When out-of-band DTMF transfer is used, the parameter 'DTMF Transport Type'
is automatically set to 0 (erase the DTMF digits from the RTP stream).
The exact method to send out-of-band DTMF digits.
INFO (Nortel) [1] = Sends DTMF digits according with IETF <draft-choudhuri-sip-
info-digit-00>.
INFO (Cisco) [2] = Sends DTMF digits according with Cisco format (default).
NOTIFY (3Com) [3] = NOTIFY format <draft-mahy-sipping-signaled-digits-01.txt>.
Note 1: To use out-of-band DTMF, set 'IsDTMFUsed=1'.
Note 2: When using out-of-band DTMF, the 'DTMFTransportType' parameter is
automatically set to 0, to erase the DTMF digits from the RTP stream.
Defines the supported Receive DTMF negotiation method.
No [0] = Don't declare RFC 2833 Telephony-event parameter in SDP
Yes [3] = Declare RFC 2833 Telephony-event parameter in SDP (default)
The MediaPack is designed to always be receptive to RFC 2833 DTMF relay packets.
Therefore, it is always correct to include the 'Telephony-event' parameter as a default in
the SDP. However some gateways use the absence of the 'telephony-event' from the
SDP to decide to send DTMF digits in-band using G.711 coder, if this is the case you
can set 'RxDTMFOption=0'.
Disable [0] = No negotiation, DTMF digit is sent according to the parameters 'DTMF
Transport Type' and 'RFC2833PayloadType' (default).
Enable [4] = Enable RFC 2833 payload type (PT) negotiation.
Note 1: This parameter is applicable only if 'IsDTMFUsed=0' (out-of-band DTMF is not
used).
Note 2: If enabled, the gateway:
•
Negotiates RFC 2833 payload type using local and remote SDPs.
•
Sends DTMF packets using RFC 2833 PT according to the PT in the received SDP.
•
Expects to receive RFC 2833 packets with the same PT as configured by the
'RFC2833PayloadType' parameter.
Note 3: If the remote party doesn't include the RFC 2833 DTMF relay payload type in
the SDP, the gateway uses the same PT for send and for receive.
Note 4: If TxDTMFOption is set to 0, the RFC 2833 payload type is set according to the
parameter 'RFC2833PayloadType' for both transmit and receive.
The RFC 2833 DTMF relay dynamic payload type.
Range: 96 to 99, 106 to 127; Default = 96
The 100, 102 to 105 range is allocated for proprietary usage.
Note 1: Cisco is using payload type 101 for RFC 2833.
Note 2: When RFC 2833 payload type (PT) negotiation is used (TxDTMFOption=4), this
payload type is used for the received DTMF packets. If negotiation isn't used, this
payload type is used for receive and for transmit.
No [0] = INFO message isn't sent (default).
Yes [1] = Proprietary INFO message with hook-flash is sent when hook-flash is detected
(FXS). FXO gateways generate a hook-flash signal when INFO message with hook-
flash is received.
Note: When either of the supplementary services (Hold, Transfer or Call Waiting) is
enabled, hook-flash is used internally, and thus the hook-flash signal isn't sent via an
INFO message.
64
MediaPack SIP
Document #: LTRT-65405