User guide

MultiVOIP® Voice/Fax over IP Gateways 146
Appendix B – TCP/UDP Port Assignments
Well Known Port Numbers
The following description of port number assignments for Internet Protocol (IP) communication is taken from
the Internet Assigned Numbers Authority (IANA) web site (www.iana.org).
“The Well Known Ports are assigned by the IANA and on most systems can only be used by system (or root)
processes or by programs executed by privileged users. Ports are used in the TCP [RFC793] to name the ends
of logical connections which carry long term conversations. For the purpose of providing services to
unknown callers, a service contact port is defined. This list specifies the port used by the server process as its
contact port. The contact port is sometimes called the "well-known port". To the extent possible, these
same port assignments are used with the UDP [RFC768]. The range for assigned ports managed by the IANA
is 0-1023.”
The following table describes well-known port numbers relevant to MultiVOIP operation.
Port Number Assignment List
Function
Port Number
telnet
23
tftp
69
snmp
161
snmp tray
162
gatekeeper registration
1719
H.323
1720
SIP
5060
SysLog
514