2-30 Services and Feature Description
6866537D87-F Chapter 2 - MTM800 Product Information Manual September 2008
• Selected Network - when selected, the terminal displays the list of allowed networks for user
selection.
9.2.5 Services
The terminal will operate on all networks as it does on its home network, all calls will be made using
SSI addressing and it is the systems responsibility to reject calls to subscribers or groups that
cannot be reached.
Note: It is assumed that telephone numbers with the local country code will be understood by the
telephone gateway and dialed to the local number as a local with the country code deleted and any
front digit re-inserted as required. I.e. +44-1256-358-211, in the UK this will be amended to 01256-
358-211 and dialed.
9.2.6 MMI Operation
The user can change the network mode via the menu system. A top level menu item called ‘Net
Select’ is provided which when selected will give the user a choice between “Home Only” or
“Selected Network”. When the user chooses a new mode, if initial cell selection is needed (as
described above in 9.2.4 ) the terminal will leave the current cell and begin scanning from the
beginning of its frequency lists.
In the selected network option, the user is shown a list of network names where each network name
corresponds to one of the MNIs in the list. The network names are provisioned in the terminal as
part of provisioning of the MNI list.
The network alias or MNI of the current network is displayed on the first line of the idle display.
9.3 Registration
Note: Security aspects of registration is covered in Paragraph 11 "Security Services".
Upon camping on a cell, the terminal will send a registration request PDU to the SwMI, which
includes a request to attach to the terminal’s selected group. If the registration and attachment
succeeded, the terminal will begin normal operation on the cell.
If the registration attempt times out, or the registration is rejected by the SwMI for a temporary
reason, another registration attempt should be made. If this fails as well, the terminal will attempt to
camp on a different cell.
If the registration is rejected by the SwMI with a rejection cause that indicates that the terminal
cannot operate in this system, and there are other systems in the terminals MNI list, the terminal will
attempt to find a cell that has a different MNI than the rejected system.
If the registration request is denied by the SwMI due to Location Area Rejection, the terminal will not
attempt to register again at that cell until the next power on.
The terminal supports the modification of its subscriber class upon receipt of a new subscriber class
from the SwMI in the registration acknowledgement PDU. This subscriber class will be used until
power down or next ITSI attach, it is not saved in non-volatile memory.
9.4 Roaming
The terminal will continually monitor neighbour cells and will background scan the highest ranked
neighbour cell. When the state of the highest ranked neighbour cell is sufficiently better than the
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