Chapter 19 Cisco CallManager Device Mobility
Introducing Device Mobility
3. If the device pool in the phone record matches the device pool in the matching
subnet, the system considers the phone to be in its home location, and the
phone retains the parameters of its home device pool.
4. If the device pool in the phone record does not match the device pools in the
matching subnet, the system considers the phone to be roaming and subject
to reregistration and reapplication of device parameters. Table 19-1 describes
the possible conditions that can arise and the system responses.
Table 19-1 Device Mobility Conditions and Responses
Condition
System Response
The physical location of the phone’s home The system does not consider the
device pool stays the same as the physical phone to be roaming, and the
location of the device pools that are
associated with the matching subnet.
phone remains registered with the
home device pool.
Note
Although the phone may have
moved from one subnet to another,
the physical location and
associated services have not
changed.
The matching subnet has a single device
The system considers the phone to
pool that is assigned to it; the device pool be roaming. It reregisters with the
differs from the phone’s home device pool, parameters of the device pool for
and the physical locations differ.
the matching subnet.
The physical locations differ, and the
The system considers the phone to
matching subnet has multiple device pools be roaming. The new device pool
assigned to it.
gets assigned according to a
round-robin rule. Each time that a
roaming devices comes in to be
registered for the subnet, the next
device pool in the set of available
device pools gets assigned.
Physical location gets defined for the home The physical location has not
device pool but is not defined for the
device pools that are associated with the
matching subnet
changed, so the phone remains
registered in the home device pool.
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