User's Manual 314 Document #: LTRT-42060
Mediant 2600 E-SBC
Parameter Description
Web: Preferred Ptime
CLI: sbc-preferred-ptime
[IpProfile_SBCPreferredPTime]
Defines the packetization time (ptime) in msec for the SIP entity
associated with the IP Profile, in the outgoing SDP offer.
If the 'SDP Ptime Answer' parameter (see above) is configured to
Preferred Value [2] and the 'Preferred Ptime' parameter is
configured to a non-zero value, the configured ptime is used
(enabling ptime transrating if the other side uses a different ptime).
If the 'SDP Ptime Answer' parameter is configured to Remote
Answer [0] or Original Offer [1] and the 'Preferred Ptime'
parameter is configured to a non-zero value, the configured value
is used as the ptime in the SDP offer.
The valid range is 0 to 200. The default is 0 (i.e., a preferred ptime
is not used).
Web: Use Silence Suppression
CLI: sbc-use-silence-supp
[IpProfile_SBCUseSilenceSupp]
Defines silence suppression support for this SIP entity.
[0] Transparent (default) = Forward as is.
[1] Add = Enable silence suppression for each relevant coder
listed in the SDP.
[2] Remove = Disable silence suppression for each relevant
coder listed in the SDP.
Note: The parameter requires DSP resources.
Web: Play RBT To Transferee
CLI: sbc-play-rbt-to-xferee
[IpProfile_SBCPlayRBTToTrans
feree]
Enables the device to play a ringback tone to the transferred party
(transferee) during a blind call transfer, for this SIP entity (which
does not support such a tone generation during call transfer). The
ringback tone indicates to the transferee of the ringing of the
transfer target (to where the transferee is being transferred).
[0] No (Default)
[1] Yes
Typically, the transferee hears a ringback tone only if the transfer
target sends it early media. However, if the transferee is put on-
hold before being transferred, no ringback tone is heard.
When this feature is enabled, the device generates a ringback tone
to the transferee during call transfer in the following scenarios:
Transfer target sends a SIP 180 (Ringing) to the device.
For non-blind transfer, if the call is transferred while the transfer
target is ringing and no early media occurs.
The 'Remote Early Media RTP Behavior parameter is set to
Delayed (used in the Lync environment), and transfer target
sends a 183 Session progress with SDP offer. If early media
from the transfer target has already been detected, the
transferee receives RTP stream from the transfer target. If it has
not been detected, the device generates a ringback tone to the
transferee and stops the tone generation once RTP has been
detected from the transfer target.
For any of these scenarios, if the transferee is put on-hold by the
transferor, the device retrieves the transferee from hold, sends a
re-INVITE if necessary, and then plays the ringback tone.
Note: For the device to play the ringback tone, it must be loaded
with a Prerecorded Tones (PRT) file. For more information, see
Prerecorded Tones File on page 433.
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