Configuration Guide — 8341B DSP-1282 & DSP-1283: SIP Endpoint with Mitel 8.0 PR3 • 21
Mitel: SIP Device Capabilities -SDP OptionsTab
3. IntheSDPOptions tab,dothefollowing:
a. Click Yes for AllowUsingUPDATEFor EarlyMediaRenegotiation.
b. Click Yes for PreventtheUseof IPAddress 0.0.0.0in SDPMessages.
c. ClickYes for RenegotiateSDPToEnforceSymmetricCodec.
d. Leaveallotherfields atthedefaultvalues.
4. ClickSave.
Mitel: SIP Device Capabilities -SignalingandHeader Manipulation Tab