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Configuration Guide — 8341B
DSP-1282 & DSP-1283: SIP Endpoint with Mitel 8.0 PR3 • 27
Mitel: SIP Peer Profile - Signaling and Header Manipulation Tab
7. In the Signaling and Header Manipulation tab, do the following:
a. Select Yes for Allow Display Update.
b. Select No for Require Reliable Provisional Responses on Outgoing Calls.
8. Leave all other tabs at the default values.