Synway Syn_PBX100 U100, User Manual, Page: 34 / 132

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Call Method : If in this trunk you have more than 1 FXO/GSM ports selected, then this
parameter defines how to use these ports for outbound phone calls.
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Busy Detection : Enable busy tone detection, it is also possible to specify how many busy
tones to wait for before hanging up.
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Busy Count : Specify how many busy tones to wait for before hanging up, configurable only if
Busy Detection is enabled.
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Input Volume : The volume of the incoming calls from FXO channel/channels.
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Output Volume : The volume of the outgoing calls from FXO channel/channels.
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Call Progress : If enabled, call progress attempts to determine answer, busy, and ringing on
phone lines. This feature is HIGHLY EXPERIMENTAL and can easily detect false answers and
therefore can prove unreliable.
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Progress Zone : Progress zone also affects the pattern used for busy detection, only effective
when Call Progress in turned on.
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Busy Pattern : If busy detection is enabled, it is also possible to specify the cadence of your
busy signal.
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Language : You can choose a desired language of the system voice prompts to play to the
incoming calls from this trunk. For example, if the call is not answered or the user is busy the
SYN_PBX system will notify the caller to leave a voice message in the language you set.

Answer on Polarity Switch : When enabled, FXO (FXS signaled) ports watch for a polarity
reversal to mark when an outgoing call is answered by the remote party.

Hangup on Polarity Switch : In certain countries, a polarity reversal is used to signal the
disconnection of a phone line. If the “hangup on polarity switch” option is selected, the call
will be considered "hung up" on a polarity reversal.
When creating a FXO trunk, if you are not competent with the advanced options then please do
not configure or change the default values.
GSM Trunk
If you have ordered GSM or WCDMA modules for yourSyn_PBX100 SYN_PBX system, the user
extensions will be able to make and receive phone calls from the mobile network.
You first have to insert SIM cards into the SIM slots of the GSM/WCDMA modules and then install
the modules to the SYN_PBX100 module slots. Antennas should be properly installed and placed
in open space for better signal reception. After completing the above, power on the SYN_PBX and
you’ll be able to configure GSM/WCDMA trunks in exactly the same way as you configure FXO
trunks.
GSM and WCDMA Specifications
Module Working Frequencies
2GSM GSM/GPRS 850/900/1800/1900MHz
4GSM GSM/GPRS 850/900/1800/1900MHz