Chapter
3: Web Management
LLDP - LLDP-MED
PoE Switch User Manual | 149
possibility of the neighbors receiving the LLDP frame. With Fast start repeat count it is
possible to specify the number of times the fast start transmission would be repeated. The
recommended value is 4 times, given that 4 LLDP frames with a 1 second interval will be
transmitted, when an LLDP frame with new information is received.
It should be noted that LLDP-MED and the LLDP-MED Fast Start mechanism is only intended
to run on links between LLDP-MED Network Connectivity Devices and Endpoint Devices,
and as such does not apply to links between LAN infrastructure elements, including Network
Connectivity Devices, or other types of links.
Coordinates Location
Latitude
Latitude SHOULD be normalized to within 0-90 degrees with a maximum of 4 digits.
It is possible to specify the direction to either North of the equator or South of the equator.
Longitude
Longitude SHOULD be normalized to within 0-180 degrees with a maximum of 4 digits.
It is possible to specify the direction to either East of the prime meridian or West of the prime
meridian.
Altitude
Altitude SHOULD be normalized to within -32767 to 32767 with a maximum of 4 digits.
It is possible to select between two altitude types (floors or meters).
Meters:
Representing meters of Altitude defined by the vertical datum specified.
Floors:
Representing altitude in a form more relevant in buildings which have different
floor-to-floor dimensions. An altitude = 0.0 is meaningful even outside a building, and
represents ground level at the given latitude and longitude. Inside a building, 0.0
represents the floor level associated with ground level at the main entrance.
Map Datum
The Map Datum is used for the coordinates given in these options:
WGS84:
(Geographical 3D) - World Geodesic System 1984, CRS Code 4327, Prime
Meridian Name: Greenwich.
NAD83/NAVD88:
North American Datum 1983, CRS Code 4269, Prime Meridian
Name: Greenwich; The associated vertical datum is the North American Vertical Datum
of 1988 (NAVD88). This datum pair is to be used when referencing locations on land,
not near tidal water (which would use Datum = NAD83/MLLW).
