Polycom CX5500 Unified Conference Station Administrator’s Guide 1.1.0
Polycom, Inc. 228
● End-of-LLDPDU—Must be last TLV
● LLDP-MED Capabilities
● LLDP-MED Network Policy—VLAN, L2 QoS, L3 QoS
● LLDP-MED Extended Power-Via-MDI TLV—Power Type, Power Source, Power Priority, Power
Value
Optional:
● Port Description
● System Name—Administrator assigned name
● System Description—Includes device type, phone number, hardware version, and software version
● System Capabilities—Set as ‘Telephone’ capability
● MAC / PHY config status—Detects duplex mismatch
● Management Address—Used for network discovery
● LLDP-MED Location Identification—Location data formats: Co-ordinate, Civic Address, ECS ELIN
● LLDP-MED Inventory Management —Hardware Revision, Firmware Revision, Software Revision,
Serial Number, Manufacturer’s Name, Model Name, Asset ID
An LLDP frame shall contain all mandatory TLVs. The frame will be recognized as LLDP only if it contains
mandatory TLVs. Polycom phones running the UC Software will support LLDP frames with both
mandatory and optional TLVs. The basic structure of an LLDP frame and a table containing all TLVs
along with each field is explained in Supported TLVs.
LLDP-MED Location Identification
As per section 10.2.4.4 of the LLDP-MED standard, LLDP-MED endpoint devices need to transmit Location
Identification TLVs if they are capable of either automatically determining their physical location by use of GPS
or radio beacon or capable of being statically configured with this information.
At present, the phones do not have the capability to determine their physical location automatically or
provision to a statically configured location. Because of these limitations, the phones will not transmit Location
Identification TLV in the LLDP frame. However, the location information from the switch is decoded and
displayed on the phone’s menu.
For more information on device configuration parameters, refer to the section <device/>.
Supported TLVs
The basic TLV format is as follows:
● TLV Type (7 bits) [0-6]
● TLV Length (9 bits) [7-15]
● TLV Information (0-511 bytes)
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