Configuration - Voice Service SIP Mode

dtmf

Use the Voice Service SIP dtmf command to configure the DTMF events.

Syntax: (config-voice-serv-sip)# dtmf {inbandrfc2833}

Field

Definition

inband

Configure the DTMF in-band, as part of the RTP packets.

 

 

rfc2833

Configure the DTMF events out-of-band, as RTP event packets.

 

 

Example: (config-voice-serv-sip)# dtmf inband

Supported Platforms: Adit 3104, Adit 3500, MSR

early-media

Use the Voice Service SIP early-mediacommand to configure the SIP early media. Early Media is the ability of two SIP user agents to communicate before a SIP call is actually established. Support for early media is important largely for interoperability with the PSTN.

Syntax: (config-voice-serv-sip)# early-media {auto180183}

Field

auto

180

183

Definition

Send 180/183, based on if in-band call progress tones are available.

The 180 Ringing message is a provisional or informational response used to indicate that the INVITE message has been received by the user agent and that alerting is taking place.

The 183 Session Progress response indicates that information about the call state is present in the message body media information. Note: Both 180 and 183 messages may contain SDP which allow an early media session to be established prior to the call being answered.

Example: (config-voice-serv-sip)# early-media auto

Supported Platforms: Adit 3500, MSR

25-4

Adit 3000 (Rel. 1.6) and MSR Card (Rel 2.0) CLI

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Carrier Access none manual Dtmf, Early-media, Inband, Rfc2833, Auto 180 183