
18 (19)
5 Integration Notes
Please note that the following scenarios are currently not supported when MX-ONE is integrated with
Lync Server:
• REFER cases:
• OC Client transfers the inbound call to another PSTN phone after answering it when
REFER is enabled
• Result: Originating phone does not hear ring back during the transfer, but once the
PSTN phone answers the call two way voice paths is present
• Solution: Disable REFER
• Outbound Call: Blind transfer to another Client
• Result: Originating phone does not hear ring back during the transfer, but once the
PSTN phone answers the call two way voice paths is present
• Solution: Disable REFER
• Inbound Call: Blind Transfer to PBX user
• Result: Originating phone does not hear ring back during the transfer, but once the
PSTN phone answers the call two way voice paths is present
• Solution: Disable REFER
• Early Media before answer.
• MX-ONE does not support sending DTMF as a part of early media.
6 References
Please always check the latest documentation. The links below are the ones available at the time of
this guide was written.
Aastra CPI Documentation – Aastra MX-ONE V.4.1 SP3 and Aastra 700 V.1.0.4 or later.
Lync Server
Deploying Enterprise Voice
Enable Users for Enterprise Voice
7 Revision History
Document Version Comment Date
Rev. A First issue 2011-10-07
Rev. B Second issue 2011-12-01
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