PLANET VIP-350PT User Manual
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Back
Mode
Configure to use default proxy server or not. If Auto-locating is enabled, it will acquire the SIP
proxy server responsible for the target URI by enquiring DNS NAPTR records of both “SIP+D2U”
and “SIP+D2T”, then SRV records of the target SIP domain. For example, if the target AoR is
“someone <sip:[email protected]>”, then it would query for “_sip._udp. dummy.com” or “_sip._tcp.
dummy.com” (RFC 3263). By auto-locating SIP servers, you could achieve SIP proxy redundancy
on SRV records level. That is if the query for DNS SRV records returns more than one SRV record,
the IP Phone will use the SRV record of higher priority as primary SIP server, whereas the one of
lower priority as a backup server whenever it fails to reach the primary one. For example, you may
configure your DNS server to include the following SIP “Service Record” for UDP transport
“ (_sip._udp); please change those host and IP in red font accordingly:
$ORIGIN YourISP.com
;; Pref Weight Port Target
_sip_udp.YourISP.com. IN SRV 0 0 1000
proxy.sip.YourISP.com.
_sip._udp.YourISP.com IN SRV 10 0 1000
backup.sip.YourISP.com.
proxy.sip.YourISP.com
IN A
192.168.192.99.
backup.sip.YourISP.com
IN A
192.168.192.11.
This terminal supports DHCP option code 120 to automatically discover SIP servers as per
RFC 3361. If you enable DHCP, Dynamic Host Configuration Protocol, for network configuration,
this terminal supports RFC3361 for DHCP option code 120 in addition to acquire host IP, gateway,
network mask, and DNS server. Besides, if DHCP option code 120 is not included in the same
DHCP offer for host IP/gateway/network mask, it will send a second DHCP INFORM request for
such information to automatically discover SIP server. The purpose here is to ensure it works with
existing DHCP servers which do not support RFC3361 for normal host IP/gateway/netmask
settings, but acquire DHCP option 120 for SIP server from another co-exist DHCP servers.
[Back]
Return without any changes.
【
OK】
Save changes and return..
【
↑】and【↓】 Scroll menu items.
Í
Note
Once operate in this mode, both it will use the discovered SIP servers included in
DHCP option code 120 (5 SIP servers at most) as both SIP registrar and proxy
server, and treat those discovered SIP servers listening on UDP port 5060. That is
Registrar server will be same as proxy and the settings including Proxy FQDN,
transport, and UDP port of SIP outbound proxy server will be ignored for this
service domain.