Any Networks; Congested Cell Handling; Subscriber Class; Subscriber Class By Talkgroup - Motorola MTP850 S Product Information Manual

56 | Services and Features
When DAIM feature is enabled the user has these selectable options:
Migrate to
In this mode the radio user selects the network manually. Once network is selected terminal performs migration as
to the foreign SwMI. If you change talkgroup to the one from a different network, radio automatically migrates to
this network.
Auto
In this mode the radio selects the network automatically.
After migrating the radio is in the Clear Mode. AIM, DAIM and Any Networks features are mutually exclusive.

Any Networks

This feature allows to use the radio on any network that was pre-configured in that radio, like it was its Home
network. This is useful when the radio loses its Home network coverage, but is within coverage of another network
(for example, if a radio travels between different locations). Note that calls between networks are not possible.
Note: Air Interface Encryption services are not available when roaming to a different (not Home) network.
Dynamic Air Interface Migration and Any Networks features are mutually exclusive.
This is a selling feature.

Congested Cell Handling

This feature is used only during initial registration and when roaming between sites. It is not used when camped on a
site that has become busy or congested due to no free traffic channel to make or receive calls.
When the cell that the terminal is trying to register is congested, a special level-based algorithm is in the place.
Depending on the level of congestion the terminal is waiting for the registration or is rejected on that cell.
The terminal recognizes whether the cell is congested (Control Channel Congestion). The terminal tries to roam to not
congested cells first, ranking congested ones as secondary. The cell congestion is one of the service level criteria.
The following cells are never marked as congested.
• Last suitable cell — if there are no other suitable cells (during roaming or initial cell selection).
• Serving cell.
The feature is configurable using the CPS.

Subscriber Class

When the radio powers up, or whenever it performs registration or roaming, it always uses its provisioned Subscriber
Class (SC).
When the radio registers on a cell that does not support any of its SCs, it is active only in services that have the
emergency priority.
Whenever the radio SC does not match the cell SC (the feature is configurable using the CPS), it either uses normal
ranking procedures (see section

Subscriber Class by Talkgroup

The Subscriber Class by Talkgroup feature forces all the radios attached to the same talkgroup to have the same
Subscriber Class.
The Subscriber Class by Group feature helps to avoid issues as presented in the following scenarios:
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Call Roaming on page 54), or does not roam to the cell at all.