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CH1786

CH1786 Family of Ultra Small 2400bps Modems

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Cermetek Microelectronics, Inc.

Table 4. CH1786 Register Summary

Continuation.

Register Function

S9

Carrier Detect Response Time

S10

Lost Carrier to Hang-up Delay

S11

DTMF Dialing Speed

S12

Escape Code Guard Time

S14*

Bit Mapped Options Register

S16

Modem Test Options

S21*

Bit Mapped Options Register

S22*

Bit Mapped Options Register

S23*

Bit Mapped Options Register

S24

Sleep Mode Inactivity Time

S25*

Delay to DTR

S27*

Bit Mapped Options Register

S28*

Bit Mapped Options Register

CH1786 Family of Ultra Small 2400bps Modems

Table 6A.

FAX Command Set Summary.

FAX Command Function

+FCLASS=n

Select Service Class

+F<command>? Report Active Configuration

+F<command>=? Report Operating Capabilities

+FAA=n

Data/Fax Auto Answer

+FF

Enhanced Flow Control

+FTS=n

Stop Transmission and Wait

+FTSM=n

Transmit Data

+FTH=n

Receive Data

+FTH=n

Transmit Data with HDLC

Framing

+FRH=n

Receive Data with HDLC

Framing

+FRT=n

Receive Test Data

+FTTn=m

Transmit test Data

Note

In Tables 4, 5, 6A-6C an * signifies parameters that

are stored in NVRAM upon receipt of the &W

command.

The CH1786LC, CH1786LCNE,

CH1786NE and CH1786NH do not contain NVRAM

and, therefore, do not support data storage after

power down. A detailed definition of all commands

and registers is available from Cermetek

Microelectronics, Inc. Refer to Cermetek Document

AT Commands and S-Registers Reference Guide or

access our website at www.cermetek.com.

Table 5. CH1786 AT Command Set Summary.

Basic

Function

Commands

AT

Attention Code

A

Answer command

A/

Repeat last Command

BN*

Communications Standard Option

D

Dial Command

E*

Off-Line Character Echo Option

Hn

Switch Hook Control Option

Ln*

Speaker Volume Option

Mn*

Speaker Control Option

On

On-Line Command

P

Pulse Dial

Qn*

Result Code Display Option

Sn

Select an S Register

Sn=

Write to an S Register

Sn?

Read an S Register

Vn*

Result code Form Option

Xn*

Result Code Set/Call Progress

Option

+++

Escape Code Sequence Pause

,

Pause

?

Returns Last addressed S Register

Yn*

Long Space Disconnect Option

Fn

On Line Echo character Option

Z

Reset

Table 6B.

Dial Modifiers

P

R

T

W

;

@

!

,

0-9

A,B,C,D

Dial Modifiers Summary.

Function

Pulse Dial

Originate Call in Answer

Mode

Touch Tone Dial

Wait for Dial Tone

Return to Idle State

Wait for Quiet Answer

Command

Flash Hook

Paul

Dial Digits/Characters

Table 6C. Ampersand and Percent Commands.

Ampersand

Function

Commands

&Cn*

Data Carrier Detect Option

&Dn*

Data Terminal Ready Option

&F

Load Factory Defaults

&Gn*

Guard Tone Option

&Pn*

Make to Break Ratio Section

&Sn*

Data Set Ready Option

&Tn

Test Command Option

&V

View Active Configuration

&Wn*

Store Active Profile

&Yn*

Recall Active Profile

&Zn*

Store Telephone Numbers

Percent

Function

Commands

%Dn

DTMF Attenuation

%J

Load Secondary Factory

Defaults

PHONE LINE CONNECTION GUIDELINES

1. The CH1786 must be mounted in the final

assembly such that it is isolated from exposure to

any hazardous voltages within the assembly.

Adequate separation and restraint of cables and

cords must be provided.

2003 Cermetek Microelectronics, Inc.

Page 10

Document No. 607-0004 Revision L1 (06/03)

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