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SBC session border controllers
Concurrent sessions restriction
–
No restriction —
the number of
sessions is not limited;
–
Deny all —
total prohibition of
sessions;
–
Maximum N sessions,
where N is the
number of simultaneous sessions.
Additional settings
–
Ignore source port for incoming calls
— do not check the address of the
port from which the request came
for incoming calls. When disabled, for incoming calls it is strictly checked that the call came from the address
and the port specified in the 'Remote address' field. If the option is enabled, SIP Destination is first searched
and selected from those destinations where the option is not present. Then one of those destinations where
the option is enabled and which suit the IP/hostname parameter in the 'Remote address' field is selected.
Example:
Four SIP Destinations are configured on the SBC with these remote address parameters:
Name
remote address
Option state
Dest1
192.0.2.1:5060
disabled
Dest2
192.0.2.1:5061
disabled
Dest3
192.0.2.1:5062
enabled
Requests from 192.0.2.1:5060...192.0.2.1:5062 will be handled by destination Dest1...Dest3 ac-
cording to their addresses, since they match exactly what is configured in the remote address.
The request from 192.0.2.1:5090 will get to Dest3 because the request does not fit any remote
address setting, but Dest3 ignores the port. Similarly, all requests from ports other than
5060...5062 will also go to Dest3.
It is not recommended to create several SIP Destinations with the same IP addresses
and activated ignore port settings, as it is impossible to predict which one of them
will eventually process the request.
Extended settings for SIP signaling
This field contains advanced SIP settings. With
these settings, you can adjust the fields of SIP messages
according to the specified rules.
Field filling format
[sipheader:HEADER_NAME=operation],[sipheader:...],...
where:
–
Operations — disable, insert or modification rule;
–
HEADER_name — non case-sensitive parameter, for example, Accept = accept = ACCEPT. In other
parameters, the case does matter.
