Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
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Destination Port
(Listening port)
Description of destination port
IP address of
SNMP server
Determined by
destination
device.
SNMP protocol port, it is used
to communicate with SNMP
server.
IP address of
DHCP server
DHCP protocol port, it is used
to obtain IP address from
DHCP server.
IP address of
LDAP server
Determined by
destination
device.
LDAP protocol port, it is used
to obtain the contact
information from LDAP 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 IP phones to upload
syslog information to syslog
server.
IP address of
PNP server
(Default value:
224.0.1.75)
Protocol port, it is used to
obtain the URL of updating file
from PNP server.
HTTP port (default value: 80)