http://www.hybertone.com GSM Series Voice Gateway
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C. Timeout Setting
E. Signaling QoS
Quality of Service (QoS) is a network
’
s capacity to provide priority services, including the special
bandwidth, jitter control and delay (used for real-time and interactive traffic), and improvement of
the packet loss ratio. This parameter is used to mark the specified QoS label for the call signaling
packet to increase the network service quality.
F. DTMF Signals
DTMF signals are used to transmit call signals to the call switching center over the audio band. The
DTMF means that
two different frequencies of sounds are combined into 16 types of
dialing tones.
The telecom office or 1860 service hotline identifies these dialing tones through
analyzing the DSP, and thus determines the dialing number. There are two types of DTMF signals:
inband DTMF and outband DTMF.
1) Inband DTMF
The inband DTMF transmits dialing tones and call voices together, without any processing.
Therefore, the inband DTMF transmits DTMF signals through a single way.
2) Outband DTMF
