Yealink SIP-T21 E2 Administrator's Guide

Troubleshooting
1001
Protocols and Ports Issues
What communication protocols and ports do Yealink IP phones support?
Source
Device
Source IP
Source Port
Destination
Device
Destination IP
Destination Port
(Listening port)
Protocol
Description of destination port
IP
phones
IP address
of IP
phones
2~65535
IP phone or voice
gateway
IP address of IP
phone or voice
gateway
Determined by
destination device.
UDP
RTP protocol port, it is used to
send or receive audio stream.
1024~65535
SIP Server
IP address of SIP
server
Determined by
destination device.
UDP/TCP
SIP protocol port, it is used for
signaling interaction with SIP
server.
1024~65535
TR-069 Server
IP address of TR-
069 server
Determined by
destination device.
TCP
TR-069 protocol port, it is used
to communicate with TR-
069server.
1024~65535
File server
IP address of file
server
Determined by
destination device.
TCP
HTTP protocol port, it is used to
download file.
1024~65535
Remote phone
book server
IP address of
remote phone
book server
Determined by
destination device.
TCP
HTTP protocol port, it is used to
access the remote phone book.
1024~65535
AA
IP address of AA
Determined by
destination device.
TCP
HTTP protocol port, it is used for
AA communication.
68
DHCP Server
IP address of
DHCP server
67
UDP
DHCP protocol port, it is used to
obtain IP address from DHCP
server.

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English