Matrix
SIMADO GFX11 System Manual
29
Answer Signaling on FXS Port
What’s this?
• As a general application the telecom equipment like PCO
machine will be connected to the FXS port of the system. Now
whenever the called party (remote party) goes OFF-Hook, the
caller should know about this, so that the PCO machine can
consider the call as matured and start billing. In absence of this
signal, the call will never be considered as matured and this shall
result in no billing.
• To solve such problems, Answer Signal is generated on FXS port.
If during a call from FXS to Mobile, whenever Mobile user goes
OFF-Hook (answers), they provide an Answer Signal. This
Answer Signal will be generated on the FXS port if any Billing
equipment or PCO machine or PBX is connected to the FXS port
for considering the call to be matured.
How it works?
• It is applicable for each FXS port only for OG calls made from
FXS port.
• When call is made from FXS port to any other port Mobile,
system will wait for the port at other end to get matured. For
example, Mobile port gets matured when ‘CONNECT’ Message is
detected.
• Answer Signal is generated on the FXS port when call gets
matured
• It is in form of None or Battery Reversal as explained below. By
default, Answer Signal is set to Polarity Reversal.
• None: It is used when no answer signaling is to be generated
on the FXS port.
• Polarity Reversal: It is used when Answer Signal is to be
generated in the form of Polarity Reversal on the FXS port.
For example, suppose that the polarity of the FXS port is –ve for
TIP and +ve for RING in normal condition, after dialing the
number.
When call gets matured in the system, the Battery polarity of
the FXS port will be reversed. Now TIP will become +ve and
Ring -ve.
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