Configuring The Dtmf Transport Types - 3Com VCX v7111 User Manual

the MWI lamp is configured, the phones lamp (on a phone that is equipped with an MWI
lamp) is lit. The gateway can subscribe to the MWI server per port (usually used on FXS) or
per gateway (used on FXO).
To configure MWI set the following parameters:
EnableMWI
MWIServerIP
MWIAnalogLamp
MWIDisplay
StutterToneDuration
EnableMWISubscription
MWIExpirationTime
SubscribeRetryTime
SubscriptionMode
CallerIDType (determines the standard for detection of MWI signals)
ETSIVMWITypeOneStandard
BellcoreVMWITypeOneStandard

Configuring the DTMF Transport Types

You can control the way DTMF digits are transported over the IP network to the remote
endpoint. These modes are supported:
Using NOTIFY messages according to <draft-mahy-sipping-signaled-digits-01.txt>:
1
In this mode DTMF digits are carried to the remote side using NOTIFY messages.
To enable this mode set:
RxDTMFOption = 0 (Declare RFC 2833 in SDP = No).
TxDTMFOption = 2 (1
digits are erased from the audio stream (DTMFTransportType is automatically set to
0 (DTMF Mute)).
Using RFC 2833 relay with Payload type negotiation:
2
In this mode, DTMF digits are carried to the remote side as part of the RTP stream in
accordance with RFC 2833 standard.
To enable this mode set:
TxDTMFOption = 4 (1
RxDTMFOption = 3 (Declare RFC 2833 in SDP = Yes). Note that to set the RFC 2833
payload type with a different value (other than its default, 96) configure the
RFC2833PayloadType (RFC 2833 Payload Type) parameter. The gateway negotiates
®
3Com VCX V7111 VoIP Gateway User Guide
st th
to 5 DTMF Option = NOTIFY). Note that in this mode DTMF
st th
to 5 DTMF Option = RFC 2833).
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