AudioCodes Mediant 1000 User Manual page 81

SIP User's Manual
Table 5-6: DTMF & Dialing Parameters (continues on pages 80 to 82)
Parameter
Inter Digit Timeout for
Overap Dialing [sec]
[TimeBetweenDigits]
Declare RFC 2833 in SDP
[RxDTMFOption]
st th
1 to 5 Tx DTMF Option
[TxDTMFOption]
RFC 2833 Payload Type
[RFC2833PayloadType]
Hook Flash Option
[HookFlashOption]
Use INFO for Hook-Flash
[IsHookFlashUsed]
Version 5.0
Description
Defines the time (in seconds) that the gateway waits between digits that are
received from the Tel side (ISDN uses overlap dialing). When this inter-digit
timeout expires, the gateway uses the collected digits for the called destination
number.
The valid range is 1 to 10 seconds. The default value is 4 seconds.
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 Mediant 1000 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'.
Determines a single or several preferred transmit DTMF negotiation methods.
0 (Not Supported) = No negotiation, DTMF digits are sent according to the
parameters 'DTMFTransportType' and 'RFC2833PayloadType' (default).
1 (INFO Nortel) = Sends DTMF digits according to IETF <draft-choudhuri-sip-info-
digit-00>.
2 (NOTIFY) = Sends DTMF digits according to <draft-mahy-sipping-signaled-
digits-01>.
3 (INFO Cisco) = Sends DTMF digits according to Cisco format.
4 (RFC 2833).
Note 1: DTMF negotiation methods are prioritized according to the order of their
appearance.
Note 2: When out-of-band DTMF transfer is used (1, 2 or 3), the parameter
'DTMFTransportType' is automatically set to 0 (DTMF digits are erased from the
RTP stream).
Note 3: When RFC 2833 (4) is selected, the gateway:
Negotiates RFC 2833 Payload Type (PT) 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
parameter 'RFC2833PayloadType'.
Uses the same PT for send and receive if the remote party doesn't include the
RFC 2833 DTMF PT in its SDP.
Note 4: When TxDTMFOption is set to 0, the RFC 2833 PT is set according to the
parameter 'RFC2833PayloadType' for both transmit and receive.
ini file note: The DTMF transmit methods are defined using a repetition of the
same (TxDTMFOption) parameter (up to five options can be provided).
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.
Supported hook-flash Transport Type (method by which hook-flash is sent and
received).
Valid options include:
0 = Hook-Flash indication isn't sent (default)
1 = Send proprietary INFO message with Hook-Flash indication
4 = RFC 2833
This parameter is obsolete; use instead the parameter HookFlashOption.
81
5. Web Management
December 2006