Davolink DV-332 User Manual page 89

DV-332 Analog/Digital User Guide
<Figure 1. Call ID detection from FSK signal>
There are three types to deliver Caller ID information.
Bellcore method : It uses in South America & many nations adapt this type including Korea
ETSI method : It uses in European countries
NTT method : Particulary, it specifies in Japan
Therefore, it shall classify into two types according to service type.
Type I : After initial Ring signal, it delivers caller ID information.
Type II : When user is on line & another line is connected simultaneously. This is the timing to
deliver the information.
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