Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 1911)

LLDP, LLDP-MED and Voice VLAN Introduction and Configuration
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C 70.7
LLDP-MED: Location Identification TLV
Location information can be configured for each port, and advertised to remote devices,
which can then transmit this information in calls; the location associated with voice
devices is particularly important for emergency call services. All ports may be configured
with the location of the switch, or each port may be configured with the location of the
remote voice device connected to it.
The location information for a particular port can be configured using one or more of the
following three data formats: coordinate-based, Emergency Location Identification
Number (ELIN), and civic address. Up to one location of each type can be assigned to a
port.
Location configuration information (LCI) in all configured data formats is transmitted in
Location Identification TLVs. When LLDP receives a Location Identification TLV, it updates
the remote entry in the LLDP-MED MIB with this information.
Co-ordinate LCI Coordinate-based location data format uses geospatial data, that is, latitude, longitude,
and altitude (height or floors), including indications of resolution, with reference to a
particular datum: WGS 84, NAD83—North American Vertical Datum of 1988 (NAVD88), or
NAD83—Mean Lower Low Water (MLLW). For more information, see RFC 3825, Dynamic
Host Configuration Protocol Option for Coordinate-based Location Configuration
Information.
ELIN LCI Emergency Location Identification Number (ELIN) location data format provides a unique
number for each location for Emergency Call Services (ECS). In North America, ELINs are
typically 10 digits long; ELINs up to 25 digits are supported.
Civic Address LCI The Civic Address location data format uses common street address format, as described
in RFC4776.