
Configuration Note 4. Configuring the Device
Version 6.6 69 September 2013
3. From the 'Play Ringback Tone to Tel' drop-down list, select Play Local Until Remote
Media Arrive. If a SIP 180 response is received and the voice channel is already
open (due to a previous 183 early media response or due to an SDP in the current
180 response), the Enhanced gateway plays a local ringback tone if there are no prior
received RTP packets. The Enhanced gateway stops playing the local ringback tone
as soon as it starts receiving RTP packets. At this stage, if the Enhanced gateway
receives additional 18x responses, it does not resume playing the local ringback tone.
4. From the 'Forking Handling Mode' drop-down list, select Sequential handling. If an
18x response with SDP is received, the device opens a voice stream according to the
received SDP. The device re-opens the stream according to subsequently received
18x responses with SDP.
5. Click Submit to apply your changes.
6. Open the Advanced Parameters page (Configuration tab > VoIP menu > SIP
Definitions > Advanced Parameters).
Figure 4-49: Advanced Parameters Page
7. From the 'Enable Early 183'drop-down list, select Enable.
8. Click Submit to apply your changes.
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