MSM7510GS-K Просмотр технического описания (PDF) - Oki Electric Industry

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MSM7510GS-K

300 bps Full Duplex FSK Modem – ITU-T V.21

Oki Electric Industry 

Semiconductor

OPERATION MODE

MOD2

0

0

1

1

MOD1

0

1

0

1

Table 1 Operation Mode

Mode

FSK Modem Normal Mode (Fig.2)

Analog Loop Back Test Mode (Fig.3)

Answer Tone Transmit/Detect Mode*

Power Down Mode

* Answer Tone Transmit: RS = "0"

Æ Enable

RS = "1"

Æ Disable

Answer Tone Detect: Detect

Æ CD = "0"

Non-detect Æ CD = "1"

When transmitting the answer tone, CD is held at digital "1".

MSM7510

AI

Phone

Line

AO

Receive Filter

Transmit Filter

Demodulator

Modulator

Figure 2 FSK Modem Normal Mode

RD

DTE

XD

AI

Phone

Line

AO

SG

Receive Filter

Transmit Filter

Demodulator

Modulator

Figure 3 Analog Loop Back Test Mode

RD

DTE

XD

8/12

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