Panasonic KX-TDA30 Manual page 18

2.1.3 Network Devices
Protocol
MGCP (IP-EXT)
MGCP (IP-PT)
DHCP
FTP (Port mode)
Are layer 2 or 3 switches used?
Use of repeater hubs can increase the network load, and therefore may result in degradation in speech quality.
To ensure high speech quality, use only layer 2 or 3 switches when connecting the IP-EXT card to the LAN.
Use of layer 2 or 3 switches is also strongly recommended for connecting IP-PTs.
Note
Note that the port of the switching hub that connects to the IP-EXT card should be set to operate under
"Auto Negotiation" mode.
Are Category 5 (CAT 5) or higher cables used?
When connecting network devices, make sure to use CAT 5 or higher cables. If other types of cables are used,
communications may not be carried out normally.
18 Information about IP Proprietary Telephones
Description
Media Gateway Control Protocol.
Used for call control command data and
LCD/LED data transmission.
Dynamic Host Configuration Protocol.
Used for receiving an IP address from a
DHCP server.
File Transfer Protocol.
Used for receiving a data file from a FTP
server to upgrade the firmware version.
TCP/UDP Default Port No.
UDP 2727
UDP 2427
UDP 67, 68
TCP 20, 21