Version 6.6 705 October 2014
Installation & Operation Manual 41. PSTN Gateway and IP-to-IP Applications
Parameter
Name
Type Provisioning
Type
Description
SBC
Extension
Coders
Group
Integer
0 – 10
Instant Defines the Coder Group ID for
extended (additional) coders.
This is used when transcoding
is required between two user
agents (i.e., the SDP answer
from one user agent doesn't
include any coder included in
the offer previously sent by the
other user agent). Therefore, to
allow user agents of different IP
Groups to communicate with
each other (regardless of their
capabilities), an extended
coders table with at least one
coder that is supported by each
IP Groups' user agents needs to
be assigned to each IP Group.
Therefore, each offer destined
to specific IP Groups includes
this coder.
Transcoding
Mode
Enum
OnlyIfRequired, Force
Instant Defines the voice transcoding
mode (media negotiation) for
the SBC application, between
the two SBC legs.
Only if Required – Do not
force. Many of the media
settings (such as gain
control) are not implemented
on the voice stream. The
SBC application passes
packets RTP to RTP without
any processing.
Force – Force transcoding
on outgoing SBC leg. The
device's SBC application
interworks the media by
implementing DSP
transcoding.
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