User's Manual 1232 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Parameter Description
to users. (Currently not supported.)
The parameter allows the device to act as a GRUU server for
its SIP UA clients, providing them with public GRUU’s,
according to RFC 5627. The public GRUU provided to the
client is denoted in the SIP Contact header parameters, "pub-
gruu". Public GRUU remains the same over registration
expirations. On the other SBC leg communicating with the
Proxy/Registrar, the device acts as a GRUU client.
The device creates a GRUU value for each of its registered
clients, which is mapped to the GRUU value received from the
Proxy server. In other words, the created GRUU value is only
used between the device and its clients (endpoints).
Public-GRUU: sip:userA@domain.com;gr=unique-
Bye Authentication
configure voip > sbc settings > sbc-
bye-auth
[SBCEnableByeAuthentication]
Enables authenticating a SIP BYE request before
disconnecting the call. This feature prevents, for example, a
scenario in which the SBC SIP client receives a BYE request
from a third-
party imposer assuming the identity of a participant
in t
he call and as a consequence, the call between the first and
second parties is inappropriately disconnected.
[0] Disable (default)
[1] Enable = The device forwards the SIP authentication
response (for the BYE request) to the request sender and
waits for t
he user to authenticate it. The call is disconnected
only if the authenticating server responds with a 200 OK.
SBC Enable Subscribe Trying
configure voip > sbc settings > sbc-
subs-try
[SBCSendTryingToSubscribe]
Enables the device to send SIP 100 Trying responses upon
receipt of SUBSCRIBE or NOTIFY messages.
[0] Disable (Default)
[1] Enable
BroadWorks Survivability Feature
configure voip > sbc settings > sbc-
broadworks-survivability
[SBCExtensionsProvisioningMode]
Enables SBC user registration for interoperability with
BroadSoft's BroadWorks server, to provide call survivability in
case of connectivity failure with the BroadWorks server.
[0] Disable = (Default) Normal processing of REGISTER
messages.
[1] Enable = Registration method for BroadWorks server. In
a failure scenario with BroadWorks, the device acts as a
backup SIP proxy server, maintaining call continuity
between the enterprise LAN users (subscribers) and
between the subscribers and the PSTN (if provided).
Note: For a detailed description of this feature, see ''Enabling
Auto-Provisioning of Subscriber-Specific Information of
BroadWorks Server for Survivability'' on page 759.
SBC Direct Media
configure voip > sip-interface > sbc-
direct-media
[SBCDirectMedia]
Enables the Direct Media feature (i.e., no Media Anchoring) for
all SBC calls, whereby SIP signaling is handled by the device
without handling the RTP/SRTP (media) flow between the user
agents (UA). The RTP packets do not traverse the device.
Instead, the two SIP UAs establish a direct RTP/SRTP flow
between one another. Signaling continues to traverse the
device with minimal intermediation and involvement to enable
certain SBC abilities such as routing
[0] Disable = (Default) All calls traverse the device (i.e., no
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