CH1787(1998) 데이터 시트보기 (PDF) - Cermetek Microelectronics

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CH1787
(Rev.:1998)

Small Functional Modem

Cermetek Microelectronics 

Table 2

Register

S0*

S1

S2

S3

S4

S5

S6

S7

S8

S9

S10

S11

S12

S14*

S16

S18*

S21*

S22*

S23*

S24

S25*

S27*

S28*

Ch1787 Register Summary

Function

Ring to Answer On

Ring Count

Escape Code Character

Carriage Return Character

Line Feed Character

Back Space Character

Wait For Dial Tone

Wait Time for Data Carrier

Pause Time for Comma

Carrier Detect Response Time

Lost Carrier to Hang-up Delay

DTMF Dialing Speed

Escape Code Guard Time

Bit Mapped Options Register

Modem Test Options

Test Timer

Bit Mapped Options Register

Bit Mapped Options Register

Bit Mapped Options Register

Sleep Mode Inactivity Time

Delay to DTR

Bit Mapped Options Register

Bit Mapped Options Register

*=S-Registers stored in NVRAM upon receipt of &W command

Ampersand Commands Function

*&Dn

&F

*&Gn

*&Pn

*&Sn

&Tn

&V

*&Wn

*Yn

*&Zn

*&Cn

Data Terminal Ready Option

Load Factory Defaults

Guard Tone Option

Make to Break Ratio Selection

Data Set Ready Option

Test Command Option

View Active Configuration

Store active profile

Recall active profile

Store telephone numbers

Not supported

Percent Commands

Function

%Dn

%J

DTMF Attenuation

Load Secondary Factory Defaults

NOTE: A detailed definition of all commands and registers is available from

Cermetek Microelectronics, Inc.

*= Commands that can be stored in NVRAM.

Table 3

Ch1787 “AT” Command Set Summary

Basic Commands Function

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

?

Returns Last Addressed S Register

*Yn

Long Space Disconnect Option

Fn

On Line Echo character Option

Z

Reset

“AT” COMMAND APPLICATIONS

Pause “,”

When placing a call from an office with a telephone connected to a

PBX, it may be necessary to dial an access code (usually the digit

9) to get an outside line. Inserting a comma in the telephone

number commands the modem to pause for a specific length of

time. A factory default pause time is 2 seconds.

Example: Dial 9, pause, dial number.

Enter AT DT9, 1234567

Multiple commas may be used for a greater delay time.

TOUCH TONE AND PULSE DIALING “T and P”

The modem can use DTMF (touch-tones) or dial pulses when

dialing a telephone number. If the dial command does not specify

which type to use, the modern defaults to the type last specified.

The power-on default value is P.

Example: Pulse dial 9, pause, touch-tone dial number.

Enter: AT DP9, T1234567

Originate a Call in Answer Mode “R”

The D command forces the modem into originate mode. To call

an originate-only modem, dial the number and set the modem

to answer mode via the R (reverse originate). Enter the R

command at the end of the telephone number.

Redial Last Number “A/”

Use A/, the repeat command, to redial the last telephone

number dialed when a busy signal is received.

Cermetek Microelectronics, Inc.

Document No. 603-0182 Rev. D (11/98) 7

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