AudioCodes Mediant 3000

Version 7.0 399 Mediant 3000
User's Manual 20. Coders and Profiles
Parameter Description
RFC2833PayloadType.

removes DTMF digits in transparent mode (as part of the
voice stream).
 [5] INFO (Korea) = Sends DTMF digits according to the Korea
Telecom format.
Notes:
 When out-of-band DTMF transfer is used ([1], [2], [3], or [5]), the
DTMFTransportType parameter is automatically set to 0 (DTMF
digits are removed from the RTP stream).
 The corresponding global parameter is FirstTxDTMFOption.
Second Tx DTMF Option
[IpProfile_SecondTxDtmfOption
]
Defines the second preferred transmit DTMF negotiation method.
For a description, see IpProfile_FirstTxDtmfOption (above).
Note: The corresponding global parameter is
SecondTxDTMFOption.
Rx DTMF Option
[IpProfile_RxDTMFOption]
Enables the device to declare the RFC 2833 'telephony-event'
parameter in the SDP.
 [0] Not Supported
 [3] Supported (default)
The device is always receptive to RFC 2833 DTMF relay packets.
Thus, it is always correct to include the 'telephony-event' parameter
by default in the SDP. However, some devices use the absence of
the 'telephony-event' in the SDP to decide to send DTMF digits in-
band using G.711 coder. If this is the case, set the parameter to 0.
Note: The corresponding global parameter is RxDTMFOption.
Fax Signaling Method
[IpProfile_IsFaxUsed]
Defines the SIP signaling method for establishing and transmitting
a fax session when the device detects a fax.
 [0] No Fax = (Default) No fax negotiation using SIP signaling.
The fax transport method is according to the FaxTransportMode
parameter.
 [1] T.38 Relay = Initiates T.38 fax relay.
 [2] G.711 Transport = Initiates fax/modem using the coder
G.711 A-law/Mu-law with adaptations (see Note below).
 [3] Fax Fallback = Initiates T.38 fax relay. If the T.38 negotiation
fails, the device re-initiates a fax session using the coder G.711
A-law/Mu-law with adaptations (see the Note below).
Notes:
 Fax adaptations (for options 2 and 3):

Echo Canceller = On

Silence Compression = Off

Echo Canceller Non-Linear Processor Mode = Off

Dynamic Jitter Buffer Minimum Delay = 40

Dynamic Jitter Buffer Optimization Factor = 13
 If the device initiates a fax session using G.711
(option 2 or 3), a
'gpmd' attribute is added to the SDP in the following format:

For A-law: 'a=gpmd:8 vbd=yes;ecan=on'

For Mu-law: 'a=gpmd:0 vbd=yes;ecan=on'
 When the parameter is set to 1, 2, or 3, the parameter
FaxTransportMode is ignored.
 When the parameter is set to 0, T.38 might still be used without