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Packet Data (TMO)
The terminal can be in one of the following Voice-Data interaction modes:
9.4.1
Voice Only Mode
The user has the option of selecting "Voice Only mode", in which Packet Data service is disabled. If
an external application attempts to start up in this mode, packet data registration for a 'wide link'
(see Paragraph 9.1 "General") will be rejected. If packet data service is active when this mode is
selected the packet data will be deactivated by the MT. The PEI will operate in 'local mode' only.
9.4.2
Data Only Mode
The user has the option of selecting "Data only mode", in which normal voice calls are not permitted.
Incoming non-emergency voice calls will be rejected, and the user will not be able to initiate non-
emergency voice calls. Incoming and outgoing Emergency calls are allowed.
9.4.3
Voice & Data Mode
In "Voice & Data mode" any voice call activity that occurs during a data session will have priority
over packet data.
Once the data session was interrupted by a voice call, the PD session will be suspended, until the
voice activity has ended, when the session will be resumed.
Voice Priority mode is the default mode. If the user has never explicitly selected an interaction
mode, the mode will be voice priority.
Service and feature interaction in the defined above modes is described in Paragraph 9.13 "Voice +
Data Service and Feature Interaction".
9.4.4
Data Interaction User Menu
The user is given the ability to choose one of the above interaction modes. The choice of interaction
mode will be stored in non-volatile memory and remembered at power up.
9.5
Packet Data MMI Operation
The terminal shows an indication to the user whenever the PDP context is active and it shows the
amount of used slots. The terminal has a separate indication to the user to indicate when data
transfer is in progress.
9.6
Priority of Packet Data
The packet data service PDCH access signalling has the same priority as circuit mode setup related
signalling. Interaction between Packet Data and Voice calls is shown in Paragraph 9.13 "Voice +
Data Service and Feature Interaction".
9.7
Terminal Generated ICMP Messages
The terminal will generate ICMP messages addressed to the TE2 in case of non-delivery caused by
the terminal environment. The non-delivery causes will include for example:
•
No radio coverage
•
Failed transmission
•
Service interaction
March 2009
Chapter 2 - MTP850 Ex/MTP810 Ex Product Information Manual
2-29
6866588D21-D
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