Chapter 4. Web Configuration & Operation
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CHAPTER 4
WEB OPERATION & CONFIGURATION
Fast Start Repeat Count:
Rapid startup and Emergency Call Service Location Identification Discovery of endpoints is a
critically important aspect of VoIP systems in general. In addition, it is best to advertise only those pieces of
information which are specifically relevant to particular endpoint types (for example only advertise the voice network
policy to permitted voice-capable devices), both in order to conserve the limited LLDPU space and to reduce security
and system integrity issues that can come with inappropriate knowledge of the network policy. With this in mind,
LLDP-MED defines an LLDP-MED Fast Start interaction between the protocol and the application layers on top of the
protocol, in order to achieve these related properties. With Fast start repeat count it is possible to specify the number
of times the fast start transmission is repeated. The recommended value is 4 times, giving that 4 LLDP frames with a 1
second interval will be transmitted, when a 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 between Network Connectivity Devices, or to 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.
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