User`s guide

92 Dialogic
®
1000 and 2000 Media Gateway Series User’s Guide
Parameter Reference
3.5 VoIP Media Parameters
The VoIP Media parameters include the following subgroups:
• Early Media Group
• Audio Group
• Fax Group
• RTP Group
3.5.1 Early Media Group
The Early Media subgroup includes the following parameters:
• RFC 3960 Early Media Support
• Send Early 183 Progress Response
• Early Media Requires Reliable Provisional Responses
RFC 3960 Early Media Support
Description: Specifies the Early Media mode to be supported by the gateway.
Allowed Values:
• None = Early Media support is disabled.
• Always = Early Media is enabled for all calls (RFC-3960 Gateway Model).
• OnDemand = Early Media is enabled on a call-by-call basis. INVITEs generated by the
gateway will include 'early-session' in the Supported header, while INVITEs received by the
gateway must include 'early-session' in Supported header to request Early Media (RFC 3960
Application Model).
Default Value = OnDemand
INI File Parameter Name = sipEarlyMediaSupport
Send Early 183 Progress Response
Description: Specifies when 183 Progress Response is sent from the gateway. If set to Yes, the
gateway will send 183 Progress Response prior to establishing the connection with far end. If set to
No, the gateway will send183 Progress Response after. Early Media Support must be enabled.
Allowed Values:
• Yes
• No
Default Value = No
INI File Parameter Name = sipSendEarlyProgress