Four Channel’s GSM VoIP Gateway
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A
)
RTP Port Range
This parameter specifies the range of the RTP (Real Time Protocol) Ports used by
the GoIP400 Gateway. If your network limits the usable port range, this parameter
may need to be modified.
Please consult your network administrator for more information.
B
)
Packet Length
This parameter defines the voice packet length. The default setting is 20ms. The
range is from 5ms to 40ms at an increment of 5 ms. Please note that some codes
have a minimum packet length of more than 5 ms.
C
)
Jitter Buffer Mode
Since data packets may arrives at different orders, the Jitter Buffer is used to
hold the data packets received for re-arrangement according to the packet sequence
number. Three Jitter Buffer Modes are supported: Adaptive, Sequential, and Fixed.
The default is set to Adaptive mode with a minimum jitter of 60 ms and a maximum
jitter of 220ms. Please consult your network administrator for more information on
the network environment in order to determine the optimal settings.
D
)
Media Qos
Similar to the Signaling QoS, the Media Qos in intended to improve the voice
performance or quality If your local network supports QoS