ISDN TA POTS Interface

CMX625

 2001 Consumer Microcircuits Limited

15

D/625/2

Tone Field 0, MODE Register bit 1 and bit 0 = ‘0’ and ‘0’ respectively.

TX TONES Register Bits 4-7

Frequency

TX TONES Register Bits 0-3

Frequency

D7

D6

D5

D4

(Hz)

D3

D2

D1

D0

(Hz)

0

0

0

0

0 = OFF

0

0

0

0

0 = OFF

0

0

0

1

252.4

0

0

0

1

* 17.1

0

0

1

0

268.7

0

0

1

0

* 20.5

0

0

1

1

285.3

0

0

1

1

* 24.9

0

1

0

0

315.5

0

1

0

0

* 34.1

0

1

0

1

330.5

0

1

0

1

* 41.0

0

1

1

0

375.2

0

1

1

0

* 51.2

0

1

1

1

404.3

0

1

1

1

-

1

0

0

0

468.0

1

0

0

0

262.9

1

0

0

1

495.8

1

0

0

1

293.6

1

0

1

0

520.6

1

0

1

0

348.2

1

0

1

1

548.0

1

0

1

1

392.6

1

1

0

0

562.8

1

1

0

0

1600

1

1

0

1

578.4

1

1

0

1

1633

1

1

1

0

595.0

1

1

1

0

1827

1

1

1

1

612.5

1

1

1

1

587.2

NOTE: * These outputs are routed to the RING digital output instead of the TONEFSK output. Any single

tone output level at TONEFSK output is 0dBm.

Tone Field 1, MODE Register bit 1 and bit 0 = ‘0’ and ‘1’ respectively

TX TONES Register Bits 4-7

Frequency

TX TONES Register Bits 0-3

Frequency

D7

D6

D5

D4

(Hz)

D3

D2

D1

D0

(Hz)

0

0

0

0

0 = OFF

0

0

0

0

0 = OFF

0

0

0

1

120

0

0

0

1

330

0

0

1

0

150

0

0

1

0

416

0

0

1

1

154

0

0

1

1

420

0

1

0

0

250

0

1

0

0

425

0

1

0

1

300

0

1

0

1

433

0

1

1

0

350

0

1

1

0

440

0

1

1

1

360

0

1

1

1

450

1

0

0

0

367

1

0

0

0

460

1

0

0

1

375

1

0

0

1

480

1

0

1

0

380

1

0

1

0

500

1

0

1

1

383

1

0

1

1

600

1

1

0

0

400

1

1

0

0

620

1

1

0

1

450

1

1

0

1

720

1

1

1

0

475

1

1

1

0

930

1

1

1

1

480

1

1

1

1

-