AudioCodes Mediant 2600 User Manual

User's Manual 170 Document #: LTRT-42060
Mediant 2600 E-SBC
Note: To set the RFC 2833 payload type with a value other than its default, use the
RFC2833PayloadType parameter. The device negotiates the RFC 2833 payload type
using local and remote SDP and sends packets using the payload type from the
received SDP. The device expects to receive RFC 2833 packets with the same
payload type as configured by this parameter. If the remote side doesn’t include
‘telephony-event’ in its SDP, the device sends DTMF digits in transparent mode (as
part of the voice stream).
 Sending DTMF digits (in RTP packets) as part of the audio stream (DTMF Relay
is disabled): This method is typically used with G.711 coders. With other low-bit rate
(LBR) coders, the quality of the DTMF digits is reduced. To enable this mode, define
the following:
a. Set the 'Declare RFC 2833 in SDP' parameter to No (RxDTMFOption = 0).
b. Set the '1st Tx DTMF Option' parameter to Not Supported (TxDTMFOption = 0).
c. Set the ini file parameter, DTMFTransportType to 2 (i.e., transparent).
 Using INFO message according to Korea mode: DTMF digits are sent to the
remote side in INFO messages. To enable this mode, define the following:
a. Set the 'Declare RFC 2833 in SDP' parameter to No (RxDTMFOption = 0).
b. Set the '1st Tx DTMF Option' parameter to INFO (Cisco) (TxDTMFOption = 3).
Note: In this mode, DTMF digits are removed from the audio stream (and the 'DTMF
Transport Type' parameter is automatically set to Mute DTMF).
Notes:
• The device is always ready to receive DTMF packets over IP in all possible
transport modes: INFO messages, NOTIFY, and RFC 2833 (in proper payload
type) or as part of the audio stream.
• To exclude RFC 2833 Telephony event parameter from the device's SDP, set the
'Declare RFC 2833 in SDP' parameter to No.
The following parameters affect the way the device handles the DTMF digits:
 TxDTMFOption, RxDTMFOption, RFC2833TxPayloadType, and
RFC2833RxPayloadType
 MGCPDTMFDetectionPoint, DTMFVolume, DTMFTransportType, DTMFDigitLength,
and DTMFInterDigitInterval

AudioCodes Mediant 2600 Specifications

General

Brand	AudioCodes
Model	Mediant 2600
Category	Controller
Language	English