VS-EIU-100X User Manual
Proprietary and Confidential to OpenVox Communication Co.,Ltd
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Table 4-4-3 Instruction of Codec Settings
Options
Definition
Band Width
Specify bandwith of low, medium, or high to control which codes are used in general
Disallow
Fine tune codes here using “allow” and “disallow” clause with specific codes
Allow
Fine tune codes here using “allow” and “disallow” clause with specific codes
Codec Priority
Codec priority controls the codec negotiation of an inbound IAX2 call. This option is
inherited to all user entity separately which will override the setting in general.
Table 4-4-4 Instruction of Jitter Buffer
Options
Definition
Jitter Buffer
Global default as to whether you want the jitter buffer at all
Force Jitter Buffer
In the ideal world, when we bridge VoIP channels we don’t want to jitter buffering on the
switch, since the endpoints can each handle this. However, some endpoints may have poor
jitter buffers themselves, so this option will force to always jitter buffer, even in this case.
Max Jitter Buffers
A maximum size for the jitter buffer
Resyncthreshold
When the jitter buffer notice a significant change in delay that continue over a few frames,
it will resync, assuming that the change in delay was caused by a timestamping mix-up.
The threshold for noticing a change in delay is measured as twice the measured jitter plus
this resync threshold.
Max Jitter Interps
The maximum number of interpolation frames the jitter buffer should return in a row. Since
some clients do not send CNG/DTX frames to indicate silence, the jitter buffer will assume
silence has begun after returning this many interpolations. This prevents interpolating
throughout a long silence.
Jitter Target Extra
Number of milliseconds by which the new jitter buffer will pad its size. The default is 40,
so without modification, the new jitter buffer will set its size to the jitter value may help if
your network normally has low jitter, but occasionally has spikes.
Table 4-4-5 Instruction of Misc Settings
Options
Definition
IAX Thread Count
Establishes the number of iax helper thread to handle I/O
IAX Max Thread Count
Establishes the number of extra dynamic threads that may by spawned to handle
I/O
Max Call Number
The ‘maxcallnumbers’ option limits the amount of call numbers allowed for each
individual remote IP address. Once an IP address reaches its call number limit, no
more new connections are allowed until the previous ones close. This option can
be used in a peer definition as well, but only takes effect for the IP of a dynamic
peer after it completes registration.
MaxCallNumbers_Nonvalidated The ‘maxcallnumbers-nonvalidated’ is used to set the combined number of call
numbers that can be allocated for connections where call token validation has
been disabled. Unlike the ‘maxcallnumbers’ option, this limit is not separate for
each individual IP address. Any connection resulting in a non-call token validated
