CH1794 View Datasheet(PDF) - Cermetek Microelectronics

Part Name

Description

Manufacturer

CH1794

HIGH SPEED Modem and FAX FAMILY

Cermetek Microelectronics 

Cermetek Microelectronics, Inc.

If Problems Arise. If any of your telephone

equipment is not operating properly, you should

immediately remove it from you telephone line, as it

may cause harm to the telephone network. If the

telephone company notes a problem, they may

temporarily discontinue service. When practical, they

will notify you in advance of this disconnection. If

advance notice is not feasible, you will be notified as

soon as possible.

When you are notified, you will be given the

opportunity to connect the problem and informed of

your right to file a complaint with the FCC. Contact

your local telephone service provider if you have any

questions about your phone. Line.

In the event repairs are ever needed on the (insert

your product name), they should be performed by

(insert your company name), or an authorized

representative or (insert your company name). For

information contact: (insert your company address).

DEFAULT STATUS, PERFORMANCE AND

SPECS

Prior to delivery, Cermetek installs into each HS

Modem the following default Configuration Profile:

Default Connect Speeds are 14,400bps, 33,600bps

and 57,600bps for CH1794, CH1799 and CH2056

respectively

Serial port data rate auto baud enabled

Bell 212A operation at 1200bps

Parity – none

Auto answer disabled

Command echo ON

All result codes enabled – except \REL codes

Wait for dial tone before dialing – 2 seconds

Dials with touch-tone (T)

Detects busy signal (ATX4)

Full word result codes – non-extended

Pulse dial make/break ratio = 39/61-10pps

Test timer set to 0 seconds, test modes disabled

Inactivity timer set to 0 minutes

CTS always active

DSR is ignored

DCD is ignored

RTS to CTS delay - .01 seconds

DTR always active – hang up after transition

Long space disconnect disabled

Speaker enabled but off when receiving carrier

Speaker volume set to low

Local modem will not grant RDL request from remote

modem

Guard tones disabled

Minimum DTR pulse width = .05 seconds

Ring count – 00

Escape code character = 43 (+)

High Speed Modem and FAX Family

Flash to on hook = 70 msec

Auto speed detection enabled

DTE connect speed, connect messages

Back space character = 08 (BS) Carriage return

character = 13 (CR)

Line feed Character = 10 (LF)

Duration of wait for dial tone =2 seconds

Duration of wait for carrier after dialing = 50 seconds

Carrier detect response time = 0.6 seconds

Escape code guard time = 1 second

Length of use after comma = 2.0 seconds

Last carrier to hang up delay = 1.4 seconds

DTMF interdigit delay = .095 seconds

Auto sync address or address detection =0

Connection detected at DTE – Highest speed

38,400kbps

Auto retrain enabled – 30 seconds attempts

MNP error correction mode can be negotiated (&Q5)

MNP – non-extended service selected

MNP error correction block size is 128 characters

selected

Data compression – negotiation enabled

Transmit break length is 0.3 seconds

All breaks are transmitted in sequence with data

Serial port flow control enabled = RTS/CTS

XON/XOFF flow control characters selected

Note: Upon power-up the HS Modem will recall

user profile 0 which may override some of the

above Factory Defaults. If desired the user may, at

their option, save the factory defaults in user

profile 0.

Table 5A. Summary of Non-Extended Result

Codes.

Result Code Form

n is ATXn

Command

Terse

Verbose or Long

01234

or

Short

0 OK

XXXXX

1 CONNECT

XXXXX

2 RING

XXXXX

3 NO CARRIER

XXXXX

4 ERROR

XXXXX

5 CONNECT 1200

1 XXXX

6 NO DIAL TONE

3 3 XXX

7 BUSY

3 3 3 XX

8 NO ANSWER

XXXXX

9 CONNECT 0600

1 XXXX

10 CONNECT 2400

1 XXXX

11 CONNECT 4800

1 XXXX

12 CONNECT 9600

1 XXXX

13 CONNECT 7200

1 XXXX

14 CONNECT 12000

1 XXXX

15 CONNECT 14400

1 XXXX

16 CONNECT 19200

1 XXXX

2003 Cermetek Microelectronics, Inc.

Page 11

Document No. 607-0003 Revision K3 (09/03)

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