User`s manual

Version 5.4 397 May 2008
SIP User's Manual 7. IP Telephony Capabilities
7 IP Telephony Capabilities
This section describes the device's IP telephony capabilities.
7.1 Configuring the DTMF Transport Types
You can control the way DTMF digits are transported over the IP network to the remote
endpoint, by using one of the following modes:
 Using INFO message according to Nortel IETF draft: DTMF digits are carried to the
remote side in INFO messages. To enable this mode, define the following:
• RxDTMFOption = 0 (ini file); 'Declare RFC 2833 in SDP' field = 'No' (Web
interface -- refer to ''DTMF & Dialing Parameters'' on page 160)
• TxDTMFOption = 1 (ini file); '1
st
to 5
th
Tx DTMF Option' field = 'INFO (Nortel)'
(Web interface -- refer to ''DTMF & Dialing Parameters'' on page 160)
Note that in this mode, DTMF digits are erased from the audio stream
[DTMFTransportType is automatically set to 0 ('DTMF Transport Type' field = 'DTMF
Mute' -- Web interface)].
 Using INFO message according to Cisco’s mode: DTMF digits are carried to the
remote side in INFO messages. To enable this mode, define the following:
• RxDTMFOption = 0 (ini file); 'Declare RFC 2833 in SDP' field = 'No' (Web
interface -- refer to ''DTMF & Dialing Parameters'' on page 160)
• TxDTMFOption = 3 (ini file); '1
st
to 5
th
Tx DTMF Option' field = 'INFO (Cisco)' (Web
interface -- refer to ''DTMF & Dialing Parameters'' on page 160)
Note that in this mode, DTMF digits are erased from the audio stream
(DTMFTransportType is automatically set to 0 ('DTMF Transport Type' field = 'DTMF
Mute' -- Web interface)].
 Using NOTIFY messages according to <draft-mahy-sipping-signaled-digits-
01.txt>: DTMF digits are carried to the remote side using NOTIFY messages. To
enable this mode, define the following:
• RxDTMFOption = 0 (ini file); 'Declare RFC 2833 in SDP' field = 'No' (Web
interface -- refer to ''DTMF & Dialing Parameters'' on page 160)
• TxDTMFOption = 2 (ini file); '1
st
to 5
th
Tx DTMF Option' field = 'NOTIFY' (Web
interface -- refer to ''DTMF & Dialing Parameters'' on page 160)
Note that in this mode, DTMF digits are erased from the audio stream
(DTMFTransportType is automatically set to 0 ('DTMF Transport Type' field = 'DTMF
Mute' -- Web interface)].
 Using RFC 2833 relay with Payload type negotiation: DTMF digits are carried to
the remote side as part of the RTP stream in accordance with RFC 2833 standard. To
enable this mode, define the following:
• RxDTMFOption = 3 (ini file); 'Declare RFC 2833 in SDP' field = 'Yes' (Web
interface -- refer to ''DTMF & Dialing Parameters'' on page 160)
• TxDTMFOption = 4 (ini file); '1
st
to 5
th
Tx DTMF Option' field = 'RFC 2833' (Web
interface -- refer to ''DTMF & Dialing Parameters'' on page 160)