# The system information:
- MiVoice Business Release level: 10.0 SP1
- Active software load:10.0.1.22 (21.0.1.50)
- Platform: SMBC 7963MB of RAM
# The incoming and outgoing calls via CO line / Analog trunk is OKI
# The PROBLEM with SIP trunk calls:
- Incoming / outgoing calls to / from a SIP phone EXT is OKI
- Incoming calls to a Mitel 5300, 6900 or Analog device EXT: the EXT rings -> picks up handset -> call is disconnected
- Outgoing calls from phone 5300, 6900 or Analog EXT: called phone rings -> answer -> call is disconnected
Please give me advice and support?
Thank you very much in advance!
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