AudioCodes Mediant 4000 SBC User Manual page 372

CHAPTER 18 Core Entities
'Additional UDP Ports Mode'
additional-udp-ports-mode
[AdditionalUDPPortsMode]
'Encapsulating Protocol'
encapsulating-protocol
[SIPInterface_EncapsulatingProtocol]
Parameter Description
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:
■ For static port allocation (i.e., using additional
UDP ports feature for assigning a specific local
port to each SIP entity), configure the parameter
to Always Open.
Defines the type of incoming traffic (SIP messages)
expected on the SIP Interface.
■ [0] No Encapsulation = (Default) Regular (non-
WebSocket) traffic.
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