User`s manual

A large jitter buffer causes increase in the delay and decreases the packet

loss. A small jitter buffer decreases the delay but increases the packet

loss. The size of the jitter buffer depends on the condition of the network,

which varies with time. Typically the packet loss should be less than 10%

for a good quality of speech.

3.4 Phone Pattern

The FXSO could generate some tones, such like the busy tone, dial tone, ring

back tone and second dial tone…etc. Users could adjust these tones or get the

detail info from this page. (see figure 3.4)

Figure 3.4: Phone Pattern

● Ring Cadence – Adjust the pattern for the cadence of the Ring tone.

Including the Frequency, On time, Off time and the gain level.

● Ring Back Tone – Adjust the pattern for the Ring Back Tone. Including

the High, Low frequency, High, Low Level, and the On, Off time.

● Busy Tone – Adjust the Busy Tone.

● 2

Dial Tone – Adjust the second dial tone.

● Flash Frequency – Adjust the High, Low frequency for the Flash.