H.323 Application; Voice Detection Based On Answer Supervision - Soundwin VoIP Voice Gateway User Manual

PSTN Line was not support Polarity Reverse: The gateway can send the 200 OK SIP signals to
Billing System of ITSP, after the user pick up the Phone and detect the voice.
The gateway can send the 200 BYE SIP signals to Billing System of ITSP, after the user hang
up the Phone and detect the hang up voice.
This type of answer supervision is not 100% accurate. Any voice frequency is detected as
connect, including any intercept or recorded messages.

H.323 Application

Case 1: Loop Start Reverse Battery PSTN Line was set Polarity Reverse:
The gateway can send the "Q.931 connect" H.323 signals to Billing System of ITSP, after the
user pick up the Phone and detect the PSTN line answer voltage.
The gateway can send the "Q.931 Release" H.323 signals to Billing System of ITSP, after the
user hang up the Phone and detect PSTN line disconnect voltage.
Case 2: Voice Detection based on answer supervision
PSTN Line was not support Polarity Reverse:
The gateway can send the Q.931 connect H.323 signals to Billing System of ITSP, after the
user pick up the Phone and detect the voice.
The gateway can send the Q.931 Release H.323 signals to Billing System of ITSP, after the
user hang up the Phone and detect the hang up voice.
This type of answer supervision is not 100% accurate. Any voice frequency is detected as
connect, including any intercept or recorded messages.
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