Lldp - Yealink SIP-T4X Administration Manual

Administrator's Guide for SIP-T4X IP Phones
LLDP-MED (Media Endpoint Discovery)
LLDP-MED is published by the Telecommunications Industry Association (TIA). It is an
extension to LLDP that operates between endpoint devices and network connectivity
devices. LLDP-MED provides the following capabilities for IP phones:
Capabilities Discovery -- allows LLDP-MED IP phones to determine the capabilities

that the connected switch supports and has enabled.
Network Policy -- provides voice VLAN configuration to notify IP phones which VLAN

to use and QoS-related configuration for voice data. It provides a "plug and play"
network environment.
Power Management -- provides information related to how IP phones are powered,

power priority, and how much power IP phones need.
Inventory Management -- provides a means to effectively manage IP phones and

their attributes such as model number, serial number and software revision.
TLVs supported by IP phones are summarized in the following table:
TLV Type
Mandatory TLVs
Optional TLVs
IEEE Std 802.3
Organizationally
Specific TLV
168
TLV Name
Chassis ID
Port ID
Time To Live
End of LLDPDU
System Name
System Description
System Capabilities
Port Description
MAC/PHY
Configuration/Status
Description
The network address of the IP phone.
The MAC address of the IP phone.
Seconds until data unit expires.
The default value is 60s.
Marks end of LLDPDU.
Name assigned to the IP phone.
The default value is "yealink".
Description of the IP phone.
The default value is "yealink".
The supported and enabled phone
capabilities.
The supported capabilities are Bridge,
Telephone and Router.
The enabled capabilities are Bridge and
Telephone by default.
Description of port that sends data unit.
The default value is "WAN PORT".
Duplex and bit rate settings of the IP
phone.
The Auto Negotiation is supported and
enabled by default.