Allworx PowerFlex P810, User Manual

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PowerFlex
8/24/48 Port GbE PoE Managed Switch User’s Guide
Parameter Description
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 insufficient 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. Initially, a Network
Connectivity Device will only transmit LLDP TLVs in an LLDPDU. Only after an LLDP-MED Endpoint Device
is detected, will an LLDP-MED capable Network Connectivity Device start to advertise LLDP-MED TLVs in
outgoing LLDPDUs on the associated port. The LLDP-MED application will temporarily speed up the
transmission of the LLDPDU to start within a second, when a new LLDP-MED neighbor has been detected
in order to share LLDP-MED information as fast as possible to new neighbors.
Because there is a risk of an LLDP frame being lost during transmission between neighbors, it is
recommended to repeat the fast start transmission multiple times to increase the 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 are 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,
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Revised: October 30, 2013
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