MSM7715 View Datasheet(PDF) - Oki Electric Industry

Part Name

Description

MFG CO.

MSM7715

Multi-Function Telecommunication LSI

Oki Electric Industry 

¡ Semiconductor

When the DTMF tone is sent

TEN

tSDT

tHDT

DTG1

DTG2

DTG3

DTG4

DTO

941 Hz + 1447 Hz

Figure 2 DTMF Transmit Timing

When the call progress tone (CPT) is detected

400 Hz

AIN

CP

CPW = "1"

MSM7715

CP

CPW = "0"

tDELCP

tHOLCP

Figure 3 Call Progress Tone Detect Timing

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