Yealink Skype for Business HD IP Phones Administrator Guide
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Protocols and Ports Issues
What communication protocols and ports do Yealink Skype for Business phones support?
Destination Port
(Listening port)
Description of destination port
Skype for
Business
phones
IP address
of Skype
for
Business
phones
Skype for Business
phone or voice
gateway
IP address of
Skype for Business
phone or voice
gateway
Determined by
destination device.
RTP protocol port, it is used to
send or receive audio stream.
Determined by
destination device.
SIP protocol port, it is used for
signaling interaction with SIP
server.
IP address of file
server
Determined by
destination device.
HTTP protocol port, it is used to
download file.
Determined by
destination device.
HTTP protocol port, it is used for
AA communication.
IP address of
DHCP server
DHCP protocol port, it is used to
obtain IP address from DHCP
server.
NTP protocol port, it is used to
synchronize time from NTP time
server.
IP address of
syslog server
Syslog protocol port, it is used
for Skype for Business phones