AudioCodes MP-1FXO Manual do Utilizador Página 160

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MP-1xx H.323
MP-1xx H.323 User’s Manual 160 Document #: LTRT-65104
8.9 Metering Tones Relay
The MP-1xx FXS and FXO gateways can be used to relay standard 12 or 16 kHz metering tones
over the IP network as illustrated in Figure
8-1 below.
Figure
8-1: Metering Tone Relay Architecture
After a call is established between the FXS and FXO gateways, the PSTN generates 12 or 16
kHz metering tones towards the FXO gateway. The FXO gateway detects these pulses and
relays them, over IP, to the FXS gateway using a non-standard data in an H.225 Facility
message. The FXS gateway generates the same pulses to the connected phone.
The parameter ‘MeteringType’ (described in Table
5-28) is used to determine the frequency of the
metering tone (12 kHz (default) or 16 kHz). In addition, the correct (12 or 16 kHz) coefficient file
must be used for both FXS and FXO gateways.
To enable this feature configure ‘SendMetering2IP = 1’.
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