User Manual

Troubleshooting
377
Protocols and Ports Issues
What communication protocols and ports do Yealink Skype for Business phones support?
Source
Device
Source IP
Source
Port
Destination
Device
Destination IP
Destination Port
(Listening port)
Protocol
Description of destination port
Skype for
Business
phones
IP address
of Skype
for
Business
phones
2~65535
Skype for Business
phone or voice
gateway
IP address of
Skype for Business
phone or voice
gateway
Determined by
destination device.
UDP
RTP protocol port, it is used to
send or receive audio stream.
1024~6553
5
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.
1024~6553
5
File server
IP address of file
server
Determined by
destination device.
TCP
HTTP protocol port, it is used to
download file.
1024~6553
5
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.
1024~6553
5
NTP Server
IP address of NTP
server
123
UDP
NTP protocol port, it is used to
synchronize time from NTP time
server.
1024~6553
5
Syslog Server
IP address of
syslog server
514
UDP
Syslog protocol port, it is used
for Skype for Business phones