User's Manual 1074 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Parameter Description
is 0 (i.e. NoAudio is not supported). For example, if set to 120, the
following is added to the INVITE SDP:
a=rtpmap:120 NoAudio/8000\r\n
Note: For incoming SDP offers, NoAudio is always supported.
SIP Transport Type
configure voip > sip-
definition settings > app-sip-
transport-type
[SIPTransportType]
Determines the default transport layer for outgoing SIP calls initiated
by the device.
[0] UDP (default)
[1] TCP
[2] TLS (SIPS)
Note:
It's recommended to use TLS for communication with a SIP Proxy
and not for direct device-to-device communication.
For received calls (i.e., incoming), the device accepts all these
protocols.
Display Default SIP Port
configure voip > sip-
definition settings > display-
default-sip-port
[DisplayDefaultSIPPort]
Enables the device to add the default SIP port 5060 (UDP/TCP) or
5061 (TLS) to outgoing messages that are received without a port.
This condition also applies to manipulated messages where the
resulting message has no port number. The device adds the default
port number to the following SIP headers: Request-Uri, To, From, P-
Asserted-Identity, P-Preferred-Identity, and P-Called-Party-ID. If the
message is received with a port number other than the default, for
example, 5070, the port number is not changed.
An example of a SIP From header with the default port is shown below:
From:
<sip:+4000@10.8.4.105:5060;user=phone>;tag=f25419a
96a;epid=009FAB8F3E
[0] Disable (default)
[1] Enable
Enable SIPS
configure voip > sip-
definition settings > enable-
sips
[EnableSIPS]
Enables secured SIP (SIPS URI) connections over multiple hops.
[0] Disable (default)
[1] Enable
When the SIPTransportType parameter is set to 2 (i.e., TLS) and the
parameter EnableSIPS is disabled, TLS is used for the next network
hop only. When the parameter SIPTransportType is set to 2 or 1 (i.e.,
TCP or TLS) and EnableSIPS is enabled, TLS is used through the
entire connection (over multiple hops).
Note: If the parameter is enabled and the parameter
SIPTransportType is set to 0 (i.e., UDP), the connection fails.
TCP/TLS Connection Reuse
tcp-conn-reuse
[EnableTCPConnectionReu
se]
Enables the reuse of an established TCP or TLS connection between
the device and a SIP user agent (UA) for subsequent SIP requests
sent to the UA. Any new out-of-dialog requests (e.g., INVITE or
REGISTER) use the same secured connection. One of the benefits of
enabling the parameter is that it may improve performance by
eliminating the need for additional TCP/TLS handshakes with the UA,
allowing sessions to be established rapidly.
[0] Disable = The device uses a new TCP or TLS connection with
the UA.
[1] Enable = (Default) The device uses the same TCP or TLS
connection for all SIP requests with the UA.
Note:
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