AudioCodes Mediant 800 User Manual page 393

CHAPTER 18 Core Entities
'Additional UDP Ports Mode'
additional-udp-ports-mode
[AdditionalUDPPortsMode]
Parameter
Mediant 800 Gateway & E-SBC | User's Manual
Description
■ The maximum number of ports in the range is
limited to the maximum number of licensed
registered SBC users as specified in the License
Key installed on the device, or the maximum
number of IP Groups that can be configured (see
Configuring IP Groups) - the higher of the two
determines it. For example, if the License Key
allows 20 users and the maximum IP Groups that
can be configured is 10, then the maximum
number of ports is 20.
Enables the device to open sockets (ports) for
signaling only when needed. The parameter applies to
the Additional UDP Port feature with dynamic port
allocation (see the 'Additional UDP Ports' parameter,
above). This allows you to configure the additional
UDP port range without having to make sure that the
total number of configured ports are within the
maximum, as defined by the device's License Key.
■ [0] Always Open = (Default) The device keeps
the ports (sockets) that are configured in the SIP
Interface's 'Additional UDP Ports' parameter,
open all the time.
■ [1] Open When Used = For the ports (sockets)
that are configured in the SIP Interface's
'Additional UDP Ports' parameter, the device
opens a port only when it is used. A port is needed
when the device initiates registration with an
external SIP entity for a SIP Account (sent to the
Account's Serving IP Group), or forwards a
registration request from a user (IP Group) to a
proxy (Server-type IP Group). This option is
applicable only to dynamic port allocation, where
a port is allocated on the outgoing REGISTER
message and closed when the registration
expires. For HA systems, upon a switchover, all
the ports used in the active device are also
opened on the redundant device (now active), so
that the SIP entity is reachable. Ports that are not
configured by the SIP Interface's 'Additional UDP
Ports' parameter are closed. The option is
applicable only when the SIP Interface's
'Additional UDP Ports' parameter is configured
and enabled for a Server-type IP Group (IP
Group's 'User UDP Port Assignment' parameter)
and/or SIP Account (Account's 'UDP Port
Assignment' parameter).
Note:
■ The parameter is applicable only to the SBC
application.
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