User Manual

Administrator’s Guide for SIP-T2xP and SIP-T19P IP Phones
176
If it is not the last server in the list, the maximum number of retries depends on the
configured retry count.
Procedure
Server redundancy can be configured using the configuration files or locally.
Configuration File
<MAC>.cfg
Configure the transport type on
the IP phone.
For more information, refer to
SIP Server Domain Name
Resolution on page 360.
Local
Web User Interface
Configure the transport type on
the IP phone.
Navigate to:
http://<phoneIPAddress>/servl
et?p=account-register&q=load
&acc=0
LLDP (Linker Layer Discovery Protocol) is a vendor-neutral Link Layer protocol, which
allows IP phones to receive and/or transmit device-related information from/to directly
connected devices on the network that are also using the protocol, and store the
information about other devices. LLDP transmits information as packets called LLDP
Data Units (LLDPDUs). An LLDPDU consists of a set of Type-Length-Value (TLV) elements,
each of which contains a particular type of information about the device or the port
transmitting it.
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 specifically provides support for voice over IP (VoIP) applications
and provides the following capabilities:
 Capabilities Discovery -- allows 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