Packet Data Ip Addressing; Table 7: Packet Data Ip Addressing - Motorola MTP850 S Product Information Manual

50 | Services and Features
Voice-Data Interaction Mode
Voice and Data Mode
You can choose one of the interaction modes. The choice of interaction mode is stored in non-volatile memory and
remembered at power up.
In Voice and Data mode, if the radio moves to the traffic channel due to the voice service, the radio terminates any
active packet data transmission or reception. The data service is suspended. The data service resumes when the voice
service ends.
The radio accepts any downlink SDS message received on the Packet Data Control Channel (PDCH). The radio can
send uplink SDS messages on the PDCH.
The radio allows PEI, GPS, and WAP PD applications to activate and use the PD context simultaneously. The first
application initiates PD context activation. The next PD context activation from another PD application results in
sending a reply indicating that the PD context is active. When WAP, GPS, and PEI PD applications are using the
active PD context, the radio can filter the downlink IP packets based on their TCP/UDP port.
• UDP packets addressed to the WAP port (configured in the codeplug) are routed to the WAP internal application.
• UDP packets addressed to the GPS port (configured in the codeplug) are routed to the GPS internal application.
• UDP packets not addressed to the WAP nor the GPS ports are routed to the PEI (using PPP).
Note: When activating another PD context on the radio, use the same settings in both PD contexts.

Packet Data IP Addressing

Table 7: Packet Data IP Addressing

Addressing Mode
Wide IP Address
Local IP Address
Static or Dynamic IP Address Assignment
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Description
In Voice and Data mode any voice call activity that oc-
curs during a data session takes priority over the packet
data. Once a voice call has interrupted the data session,
the PD session is suspended, until the voice activity has
ended. Then the session is resumed. Voice priority mode
is the default mode.
Description
An IP address may be assigned to the terminal by the
SwMI during the Packet Data context activation. When
assigned, both Terminal Equipment and Mobile Terminal
applications use this address as the source address in IP
packets delivered to the infrastructure.
By default both Terminal Equipment and the radio have
their own IP addresses. Terminal Equipment and Mobile
Terminal use these addresses for local datagram trans-
missions between Terminal Equipment and Mobile Ter-
minal only and are not passed to the SwMI.
The terminals support static and dynamic IP address as-
signment. The dynamic support is requested in the fol-
lowing situations:
• Request a Dynamic IP Address is set to Dynamic
and the PD Application Type is the radio internal PD
application.
• Request a Dynamic IP Address is set to Dynamic
and the PD Application Type is a PEI PD application
requesting dynamic IP address.