Siemens HIPATH 8000 - Manual (Page 205)

Alphabetical Reference
205
Outbound proxy
• The optiPoint 410/420 family S V7.0 implements outbound proxy rout-
ing according to RFC 3261. If set, the phone routes any request outside
the context of an existing dialog to the configured proxy, regardless of
the contents of the Request-URI. The phone does not apply this rule to
requests sent within the context of an existing dialog. These requests
will always be sent to the address indicated in the received Contact
header (the remote target) or, if present, the Record-Route header. See
also RFC 3261 .
• If the user dials a URI "[email protected]" and the Outbound Proxy flag
is "Off" and the Server/Registrar is in domain "dom2.com" the phone
will attempt to resolve the domain part of the URI "dom1.com" the re-
sult will be form the request URI that is sent to the server in the
"dom2.com" domain.
• If the user dials a URI "[email protected]" and the Outbound Proxy flag
is on and the Server/Registrar is in domain "dom2.com" the phone will
not attempt to resolve the domain part of the URI "dom1.com" the re-
quest URI will contain "[email protected]" but will be sent to the Serv-
er/Registrar in the "dom2.com" domain. It is then upto the Server/Reg-
istrar to determine the location of the "dom1.com" domain and forward
the request there.
• With the Outbound Proxy flag "Off" if the user types just a phone num-
ber or name the domain part is automatically per pended and is based
on the configured Server/Registrar domain name or IP address eg. If
the Server/Registar is in "dom1.com" domain and the user dials
"123456" the request URI will be "[email protected]". The phone will
resolve the "dom1.com" part via DNS and forward the request there.
• With the Outbound Proxy flag "On" if the user types just a phone num-
ber or name the domain part can come from 1 of 2 possible sources.
If the menu item "Default OBP domain" Æ page 174 is configured then
this will be per pended to the name or number. If it is not configured
then the Server/Registrar domain will be per pended and the request
sent.
• If the Outbound Proxy flag is "On" and the Default OBP domain is set
and the user types a URI, not just a name or number, then the entered
domain will be used not the Default OBP domain thus providing an
override mechanism.
• If this flag is "Off" but a Default OBP domain is configured it will be ig-
nored.
• If DHCP delivers the address of an SIP Server according to draft-ietf-
sip-dhcp-06.txt the server must be treated as an Outbound Proxy serv-
er. In this case, if the Outbound Proxy Flag was "Off" but the server ad-
dress was delivered by DHCP this flag would be automatically enabled
and both the flag setting and the Server/Registrar address would be
read-only
• Configuration examples and their behaviors
(Server/Registrar Æ page 214 is in "dom1.com" and resolves to an IP
address "w.x.y.z", "dom2.com" resolves to "a.b.c.d"):