Supplemental Guide – DOC. 8412A
UC-P100-S/UC-P110-S Phones for Skype for Business
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Protocol and Port Issues
Supported Communication Protocols and Ports
Skype for Business Phones, Supported Protocols and Ports
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.
1024~65535 File server
IP address
of file server
Determined by
destination
device.
TCP
HTTP
protocol port,
it is used to
download file.
1024~65535 AA
IP address
of AA
Determined by
destination
device.
TCP
HTTP
protocol port,
it is used for
AA communi-
cation.
68
DHCP
Server
IP address
of DHCP
server
67
UDP
DHCP
protocol port,
it is used to
obtain the IP
address from
DHCP server.
1024~65535 NTP Server IP address of
NTP server
123
UDP
NTP protocol
port, it is used
to
synchronize
time from
NTP time
server.