Protocol Description TCP/UDP Default Port No.
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
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
2.1.3 Network Devices
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