Polycom RMX 1000 Getting Started Manual page 14

Parameter
IP Network Type
Transport Type
14
Description
Set the IP network type for the RMX 1000 system to
make a call. You need to set it based on the call type
used for the participant's endpoint. It can be set to:
H.323: Only H.323 calls are supported.
SIP: Only SIP calls are supported.
H.323 & SIP: H.323 and SIP calls are supported at
the same time.
Settings of the SIP server related parameters are
available only when the SIP network type is selected.
Set the transport layer protocol used for
communicating with the SIP server. It needs to be
consistent with the protocol supported by the SIP
server.