Configuration Guide — 8341B
DSP-1282 & DSP-1283: SIP Endpoint with Mitel 8.0 PR3 • 21
Mitel: SIP Device Capabilities - SDP Options Tab
3. In the SDP Options tab, do the following:
a. Click Yes for Allow Using UPDATE For Early Media Renegotiation.
b. Click Yes for Prevent the Use of IP Address 0.0.0.0 in SDP Messages.
c. Click Yes for Renegotiate SDP To Enforce Symmetric Codec.
d. Leave all other fields at the default values.
4. Click Save.
Mitel: SIP Device Capabilities - Signaling and Header Manipulation Tab