Panasonic KX-TDA50, Manual

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2.1 VoIP Requirements
16 Information about IP Proprietary Telephones
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.
Maintenance (IP-EXT) Panasonic proprietary protocol.
Used for communication parameter
negotiation with the PBX, download of
country/area data, confirmation of
connection with the PBX, and notification
of error messages and statistical
information to the PBX. UDP 9300
Maintenance (IP-PT) UDP 9301
MGCP (IP-EXT) Media Gateway Control Protocol.
Used for call control command data and
LCD/LED data transmission. UDP 2727
MGCP (IP-PT) UDP 2427
DHCP Dynamic Host Configuration Protocol.
Used for receiving an IP address from a
DHCP server. UDP 67, 68
FTP (Port mode) File Transfer Protocol.
Used for receiving a data file from a FTP
server to upgrade the firmware version. TCP 20, 21
Protocol Description TCP/UDP Default Port No.