Carrier Access Adit 3000 Series and Multi-Service Router (MSR) Card none - Manual (Page 464)

25-4 Adit 3000 (Rel. 1.6) and MSR Card (Rel 2.0) CLI
Configuration - Voice Service SIP Mode
dtmf
Use the Voice Service SIP dtmf command to configure the DTMF events.
Syntax:
(config-voice-serv-sip)# dtmf {inband|rfc2833}
Example:
(config-voice-serv-sip)# dtmf inband
Supported Platforms: Adit 3104, Adit 3500, MSR
early-media
Use the Voice Service SIP early-media command 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 {auto|180|183}
Example:
(config-voice-serv-sip)# early-media auto
Supported Platforms: Adit 3500, MSR
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.
Field Definition
auto Send 180/183, based on if in-band call progress tones are available.
180 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.
183 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.