CMX605P3 View Datasheet(PDF) - MX-COM Inc
Part Name
Description
MFG CO.
'CMX605P3' PDF : 26 Pages View PDF
Digital Line to POTS Interface
Page 17 of 26
CMX605 Preliminary Information
5 Application
When using the Tone/FSK bit (bit 6) of the MODE Register, each tone starts from VBIAS and returns to VBIAS
before ending:
Tone / FSK:
ENABLE
DISABLE
TONEFSK
VBIAS
Figure 11: Tone Starting and Stopping
When switching between tones in the same column (bits 4 - 7 or bits 0 - 3) of the TX TONES Register, the
transition will be phase continuous. However, switching to the “OFF” state will immediately take the output of
that tone generator to VBIAS.
TONEFSK
VBIAS
TONE 1
TONE 2
TONE = OFF
Figure 12: Tone Changing
TX TONES Register codes which do not have a frequency allocated are indicated by “-“ in the Tone Field
tables. These code values should not be used.
5.1 Telecom Tones
The following table provides the hex codes to be programmed into the particular tone field location for various
telecommunications systems applications. The tables are not exhaustive, but list the more commonly used
tones.
(f +-2.5%) (Hz)
Off
16.7
20
25
35
40
50
Field 0 (Hex)
$00
$01
$02
$03
$04
$05
$06
Table 12: Ringing Signals
¤2001 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480195.005
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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