Specifications

Windows Embedded Automotive 7 Deep Dive: Phone Core and Media Core 39
database because several entries might exist with the same first name and last name
combinations.
• When designing a UI, assume that multiples of all fields in POOM may be returned for
any given first name and last name combination. Include the ability to display multiple
numbers under a single location tag (for example, HOME: 2065551212, 4255551212,).
The APIs provide parsing of multiple POOM fields when contact names and phone
numbers are retrieved. Other fields available using the POOM APIs should also be
considered in the UI design, such as a menu to select a specific field (for example, an
address or picture) when multiple contact records with the same contact names have
multiples of that field available.
Table 14 provides POOM storage information.
Table 14: POOM storage information
POOM Storage Item
Description
Total downloadable contacts
The default is 2,000. Contacts downloaded after 2,000 are discarded. This
value can be modified in the registry for flash memory space and grammar
considerations.
Total cache size
The default is 384 kilobytes (KB). Contacts downloaded after the full name,
work, home, mobile, and other phonebook fields reach this limit are
discarded. This value can be modified in the registry for RAM space
considerations.
POOM MaxSize for flash
The default value is 16 megabytes (MB), but can be limited by placing the
.vol file on a smaller partition.
POOM field maximum size
The value is 1,200 bytes for each non-binary field and is not configurable.
POOM record limit
The value is 64 KB and is not configurable.
AUTOPOOM special fields
The phonebook work, home, mobile, and other fields can accept more
than one record with comma separations if an application uses Sync
Manager and cache. The rest of the fields accept only one entry, and the
1,200 byte limit still applies to each field.
Phone Contact Image Auto Compression
A new feature in Windows Embedded Automotive 7 is the capability to compress images that
are downloaded in phone vCards. This feature is configured via the following registry key and
value:
• HKEY_LOCAL_MACHINE\Software\Microsoft\Automotive\PhonebookOptions,
MaxPOOMImageSize
MaxPOOMImageSize, which is the POOM photo field maximum size, has a maximum value of
60 KB.