Epson Fax/Data Modem User Manual

FAX/DATA MODEM

USER’S MANUAL

Notice:

Hayes is a trademark of Microcomputer Products Inc.

Publication Number : ASK9406

Table of Contents

FCC/DOC REQUIREMENTS

FCC General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

FCC Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

DOC Notice . . .

INTRODUCTION

COMMAND REFERENCE

General Command information . . . . . . . . . . . . . . . . . . . . . . ...4

AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4

Commands Preceded by & . . . . . . . . . . . . . . . . . . . . . 11

Commands Preceded by \ . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Commands Preceded by % . . . . . . . . . . . . . . . . . ...23

Commands Preceded by-and ” . . . . . . . . . . . . . . . . ...25

Dial Modifers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Time Independent Escape Sequence (TIES) . . . . . . . . . . . ...29

Result Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..31

S REGISTER REFERENCE

Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Glossary of the S Registers . . . . . . . . . . . . . . . . . . . 38

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . ..III

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

i

1

3

35

TESTING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Local Analog Loopback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Local Analog Loopback with Self-Test . . .. . . . . . . . . . . . . 56

Remote Digital Loopback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Remote Digital Loopback with Self-Test . . .. . . . . . . . . . . 59

Local Digital Loopback . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . 60

Grant or Deny RDL Request from Remote Modem . . . . . 62

53

TROUBLESHOOTING GUIDE

APPLICATION EXAMPLES . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.. . . . . . . . . . . . .

Dialing a Remote Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Dial a Stored Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Manual Answer an Incoming Call . . .. . . . . . . . . . . . . . . 68

Auto Answer an Incoming Call . . . . . . . . . . . . . . . . . . . . . . . . . 68

Voice to Data Switching . . . . . . . . . . . . . . . . . . . . . . . . 69

TECHNICAL SPECIFICATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Features . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

QUICK REFERENCE

ASCII CODE TABLE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

63

67

71

75

79

i -

FCC/DOC REQUIREMENTS

i.1 FCC General Information

The Federal Communications Commission (FCC) of the United States restricts
specific uses of modems, and places registration responsibilities on both the manu­facturer and the individual user:

1.

The modem may not be connected to a party line or to a coin operated tele­phone,

2.

The modem manufacturer must make any repairs to the modem to maintain
valid FCC registration.

3.

Notification to the telephone company is no longer required prior to connect­ing registered equipment, but upon request from the telephone company, the
user shall tell the telephone company which line the equipment is connected
to as well as the registration number and ringer equivalence number of the
registered protective circuitry FCC information is printed on a label on the

bottom of the modem.

i.2

FCC Notice

This equipment has been tested and found to comply with the limits for a digital de­vice, pursuant to Subpart B of Part 15 of the FCC rules. These limits are designed
to provide reasonable protection against harmful interference in a residential instal­lation. This equipment generates and uses radio frequency energy and if not in-

i - FCC/DOC REQUIREMENTS

I

stalled and used the instructions. may cause interference to radio communications.
However, there is no guarantee that interference will not occur in a particular instal­lation, If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user
is encouraged to try and correct the interference by one or more of the following
measures:

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a curcuit different from that to

which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.

Shielded interconnect cables and a shielded power cord must be employed with
this equipment to insure compliance with the pertinent RF emission limits
governing this device. Changes or modifications not expressly approved by the

manufacturer could void the user’s authority to operate this equipment.

NOTE : The manufacturer is not responsible for any radio or T.V. in-

terference caused by unauthorized modifications to this eq­uipment. Such modifications could void the user’s authority
to operate the equipment.

ii

FCC/DOC REQUIREMENTS - i

i.3 DOC Notice

Notice: The Canadian Department of Communications label identifies certified
equipment. This certification means that the equipment meets certain telecommuni­cations network protective, operational and safety requirements. The Department
does not guarantee the equipment will operate to the user’s satisfaction.

Before installing this equipment, users should ensure that it is permissible to be
connected to the facilities of the local telecommunications company. The equip­ment must also be installed using an acceptable method of connection, In some
cases, the company’s inside wiring associated with a single line individual service
may be extended by means of a certified connector assembly (telephone extension
cord). The customer should be aware that compliance with the above conditions
may not prevent degradation of service in some situations.

Repairs to certified equipment should be made by an authorized Canadian mainte­nance facility designated by the supplier. Any repairs or alterations made by the
user to this equipment, or equipment malfunctions. may give the telecommunica­tions company cause to request the user to disconnect the equipment.

Users should ensure for their own protection that the electrical ground connections
of the power utility, telephone lines and internal metallic water pipe System if pre­sent, are connected together. This precaution may be particularly important in rural

areas,

i - FCC/DOC REQUIREMENTS

Ill

Caution: Users should not attempt to make such connections themselves, but
should contact the appropriate electric inspection authority. or electrician, as appro­priate.

The Load Number (LN) assigned to each terminal device denotes the percentage
or the total load to be connected to a telephone loop which is used by the device, to
prevent overloading. The termination on a loop may” consist of any combination of
devices subject only to the requirement that the total of the Load Numbers of all the
devices does not exceed 100.

iv

FCC/DOC REQUIREMENTS - i

1- INTRODUCTION

Congratulations on your purchase of this outstanding Fax/Data Modem. This man-

ual describes how to operate your new Fax/Data Modem.
Instructions for installing your Fax/Data Modem will be found in the Installation

Manual, while the information in this manual, deals exclusively with the operation
of the modem
tion registers, troubleshooting and testing.

Features :
These Fax/Data Modems combine the features of a 14400 bps data modem and a

14400 bps FAX modem. Your new Fax/Data Modem gives your personal compu­ter the ability to send and receive FAX messages over the telephone line like a
standard FAX machine. Your Fax/Data Modem also allows your PC to communi­cate with other personal computers, terminals or BBS’s (Bulletin Board Systems)
through the data modem functions,

When used as a data modem your Fax/Data Modem uses the standard AT command
set and is fully compatible with CCITT V.42, V.42bis, V.32bis, V.32, V.22bis,
V.22, V.21, MNP 2-5, Bell 103 and 212A. When used as a Fax/Data Modem it
communicates with all CCITT Group 3 FAX machines and is compatible with
CCIIT V.27ter and V.29, V 17, T.4 and T,30. Switching between DATA mode op-

eration and FAX mode operation of your Fax/Data Modem is done through its

firmware, no hardware settings are required.

after it is installed,

such as the command set, the internal configura-

1- INTRODUCTION

1

If you are already familiar with the use of a modem and the Hayes AT command
set, this modem will be extremely easy for you to use. Just read the installation pro­cedures in the installation manual and you are ready to begin operation. If you are
new to modem communications, we recommend that you read through this manual
first. If you come across terms that you don’t understand. consult the glossary.
Words in

boldface type

are command names, commands. or default settings. Car­nage returns (Enter) are noted with <CR> or [ENTER]; this does not mean to enter
these characters literally; but instead to press the Enter key.

This manual is written to be used for several models of Fax/Data Modems. Some
of the information in this manual may not apply to your fax/data modem.

2

INTRODUCTION -1

2- COMMAND REFERENCE

This chapter provides an alphabetized reference with examples for all commands
for the modem. The system of commands is depicted below in Figure 2-1.

To use these commands for dialing or configuring the modem, make sure the
communications software package you will be using lets you operate the modem

through its internal commands. If your software permits use of the modem’s inter-

nal commands, read this chapter. If not, read your software user’s manual and
ignore the rest of this manual.

Fig. 2-1

2- COMMAND REFERENCE

System of Commands

3

2.1 General Command Information

Except for the A/ command and the TIES escape sequence described in Section 2.4,
all commands must be prefixed with the attention code
command (below) would be entered as:

“AT A <CR>”.

AT.

For instance, the A

Without the

AT

prefix,
the command line cannot be executed. Once entered, AT cannot be deleted with
the Backspace or Delete keys.

More than one command can be placed on a single line and, if desired, separated
with spaces for readability. Once the carriage return

(Enter)

key is pressed, the

command line is executed. Aline with no carriage return is ignored.
The modem accepts either upper or lower case characters in the command line and

ignores any spaces within or between commands. Typing errors can be corrected
with the Backspace key. Exceptions are noted in the description of specific com­mands.

A command without any parameter is eqivant to that the parameter 0 is being used,
for example, the command line ATL is equal to

ATL0.

2.2 AT Commands

A/

Repeat Last Command

This command re-executes the last ‘AT’ command string stored in the command

4

COMMAND REFERENCE - 2

buffer. The A/ command is the only command not preceded by ‘AT’ and ended by
a carriage return.

A

Go On-line in Answer Mode

This command instincts the modem to go off-hook immediately and then make
a handshake with the remote modem. Handshaking is not available during leased
line operation. This command is useful for manually answering a call or estab­lishing a back-to-back connection with an originate mode modem.

Bn Select Protocol to 300 bps or 1200 bps

Cn

B0

B1

Carrier Transmit Control

Selects CC ITT 300 or CC ITT 1200 protocol
once the command line prefix AT has been
entered at the 300 bps or 1200 bps data rate,

Selects BELL 300 or BELL212A protocol once
the command line prefix AT has been entered
at the 300 or 1200 bps data rate. (default)

Controls the transmit carrier. The modem is preset to turn carrier on and off as nec­essary (the C1 option). The signal is on when the modem is calling, or connected to
a remote modem, and is off when it is not. The CO option is NOT valid.

C0

C1

Not permitted; returns ERROR result code
Normal transmit carrier switching. (default)

2 - COMMAND REFERENCE

5

D

D

instructs the modem to go off-hook immediately and automatically dial the num-

ber contained

Go On-line in Originate Mode

in

the dial string following D. The dial string may contain any of the
dial modifiers contained in the following section. The D command without a dial
string is usually used to switch from voice conversation to data communication or
to call a remote modem in leased-line operation mode. During this kind of opera-

tion. the dial tone monitor should be disabled with the X0, X1, or X3 commands.

En

Fn

Command Echo

E0
El

On-line Echo

Disables command echo.
Enables command echo. (default)

This command is normally used to select whether the modem echoes data back to
the host during on-line data mode. This device set does not support on-line data
mode echo,

Hn

6

F0

F1

Hang Up

HO
H1

Echo enabled. (returns an error message)

Echo disabled. (default)

Goes on-hook. (hangs up)
Goes off-hook. (ready to dial)

COMMAND REFERENCE - 2

In

Identification/Checksum Option

This command causes the modem to send product code and hardware setup informa-

tion to the DTE.

Kn

I0

I1
I2
I3
I4

Buffer Control

Report product code. (default)
Firmware version #.
Verify ROM checksum.
Device set name.
Modem configuration.

0= Hayes Escape Sequence.

Bit 0

1 =TIES Escape Sequence,

Bit 1

0= Data/fax/voice without V.42/MNP firmware.
1 =Data/fax/voice with V.42/MN P firmware.
0= Serial host interface,

Bit 2

1 =Parallel host interface.
0=No external Static RAM present.

Bit 3

1 =External Static RAM present,

Bit 4 0=8K x 8 static RAM present. (valid only if bit 3 = 1 )

1 =32K x 8 static RAM present. (valid only if bit 3 = 1)

Bits 5-7 Reserved

This command selects whether the modem SRAM is used for voice and fax mode,

K0
K1

SRAM buffer disabled. (default when no SRAM is available)
SRAM buffer enabled. (default when the SRAM is available

on modem board) (default)

2 - COMMAND REFERENCE

7

Ln

Control Speaker Volume

L0

L1
L2 Medium volume. (default)
L3

Mn

Nn

Monitor Speaker On/Off

M0 Speaker is always off.
M1
M2 Speaker is always on.
M3

Select Data Rate Handshake

Low volume.
Low volume.

High speaker volume.

Speaker is off while receiving carrier. (default)
Speaker disabled while dialing or receiving carrier

This command specifies whether the resulting modem-to-modem data rate can be
different than the local DTE-to-modem data rate.

N0

N1

When originating or answering, handshake only at
the DTE-to-modem data rate.

When originating or answering, begin handshaking
at the DTE-to-modem data rate. If the remote modem
does not support the local DTE-to-modem data rate.

fall down to the highest compatible data rate. (default)

8

COMMAND REFERENCE - 2

On

Return to the On-line State

Applies to asynchronous operation only. If the user enters the command mode from
the data mode by issuing the escape sequence, or as a result of ON-to-OFF transi­tion of DTR with the AT&D1 option in effect, the user may return to the data mode
without terminating a call by issuing the ATO command.

O0

O1

P

Set Pulse Dial as Default

Causes the modem to return to the data mode. (default)
Enters on-line data mode with a retrain before returning
to on-line data mode.

Causes the modem to assume that all subsequent dial commands are pulse dialed.

You may omit the “P’ from the dial strings.

Q

Result Code Display

Determines whether the modem sends the result codes to the DTE.

Q0

Q1

2 - COMMAND REFERENCE

Allows the modem to send result codes to the
DTE. (default)
Prohibits the modem from sending result codes

to the DTE.

9

Sn

Reading and Writing to S Registers

Sn?

Sn=x Writing to Registers:

T

Set Tone Dial as Default

Reads S Registers:
Reads the contents of the S register specified by ‘n’.

Writes the value of x to the specified S register. All
the registers will return the OK response if x is a legal
value. (n= 0-30, x=0-255)

Causes the modem to assume that all subsequent dial commands are tone dial.

Vn

Xn

Select Word or Digit Result Codes

V0

VI Displays result codes in verbose format. (default)

Displays. result codes in digital format.

Select Result Codes

X0

Connect Message Partial
Dialtone Monitor Off
Busy Tone Monitor

Off

X1

Full Full
Off

Off

X2

On

Off

X3 X4(default)
Full Full
Off
On

On
On

10

COMMAND REFERENCE - 2

The partial connect message reports CONNECT, the full message reports CON­NECT XXXX, where XXXX is the data rate.

Yn

Zn

Zn,

Enables or Disables Long Space Disconnect

Y0 Disables Long Space Disconnect.
Y1

Enables Long Space Disconnect.

(default)

Reset

which

must be placed at the end of the command line, resets the active configu­ration of the modem to the stored configuration saved in nonvolatile RAM, hanngs
up the modem. and clears the command buffer.

Z0

Z1 Resets the modem and loads stored

2.2.a Commands Preceded by &

&Cn

Select DCD Options

&C0 Maintains an ON status for the Data Carrier

&C1

Resets the modem and loads stored
configuration 0. (default)

configuration 1.

Detect. (DCD)

Uses the actual state of the carrier from the

remote modem for DCD. (default)

2 - COMMAND REFERENCE

11

&Dn

DTR Option

This command controls how the modem responds to DTR, After toggling DTR,
the host should wait 200 ms before modifying the UART registers or sending a
new command to the modem as the modem does not send an ‘OK’ message to
indicate it has performed the requested function.

&D0

&D1

&D2

&D3

Note :

&F

This

Fetch Factory Configuration

command loads command and S-register factory defaults into the active configura-

In asynchronous mode (&Q0), the modem
ignores DTR.

The modem switches from data mode to
command mode when an on-to-off transition
of DTR occurs.
An on-to-off transition of DTR causes the
modem to go on-hook (hang-up) and disable
auto-answer mode. Auto-answer mode (S0
is not equal to zero) is enabled when DTR is

turned on. (default)

An on-to-off transition of DTR re-initializes

the modem. The re-initialize procedure

performs a power-up reset, except that the
UART registers are not re-configured,

The modem will not respond to a DTR toggle

in sleep or power down mode (see S-register
S30) It is recommended that a character be
sent to wake up the modem prior to toggling
DTR.

tion, and configures the modem for data mode.

12

COMMAND REFERENCE - 2

&Gn

Set Guard Tone

&G0 Guard tone disabled. (default)
&G1
&G2

550 Hz guard tone enabled.

1800 Hz guard tone enabled.

&Jn

Auxiliary Relay Control

This command is only included for compatibility and performs no function except
to load the S-register.

&J0
&J1 &J1 command.

&Pn Select Pulse Dialing Make/Break Ratio

&P0
&P1

&Sn DSR Option

&J0 command. (default)

Sets a 39/61 make/break ratio at 10 pps. (default)
Sets a 33/67 make/break ratio at 10 pps.

This command controls how the modem treats the DSR signal.

&S0

&S1 DSR circuit is on during handshaking, off

2 - COMMAND REFERENCE

DSR circuit always on. (default)

in test or idle modes. DSR is on when carrier
is lost.

13

&Tn Testing and Diagnostics (See Chapter 4)

This command is used 10 initiate and terminate loopback tests for testing modem-to­modem and DTE-to-modem data communication integrity.

&T0

&T1
&T3 Local digital Ioopback.
&T4
&T5
&T6
&T7
&T8

Terminates test in progress. (default)
Local analog Ioopback.

Grants RDL request from remote modem.
Denies RDL request from remote modem.
Remote digital Ioopback.
Remote digital Ioopback with self-test.
Local analog Ioopback with self-test.

&U Disable Trellis coding

This command selects whether the modem will transmit and receive modulated
9600 bps carrier with QAM or Trellis encoding for V.32.

Range: n = 0-1

&U0

&U1

&Vn View Active Configuration and Stored Profiles

Enabled. (Trellis modulation with QAM
modulation as a fallback) (default)
Disabled. (QAM modulation only)

This command causes the modem to send command and S-register configuration
information to the DTE for the following: the active user profile, and one of two
stored user profiles.

14

COMMAND REFERENCE - 2

&V0
&V1

AT&V1

Stored Profile 1:

Telephone Numbers:

&Z0 12345

&Z1 T4444444
&Z2 T12345

&Z3 T 1 [phone]

Stored profile 0. (default)
Stored profile 1.

2 - COMMAND REFERENCE

15

&Wn

Store the Current Configuration to Nonvolatile RAM

&W0 Writes the current active configuration to
&W1

&Yn

&Zn

Select the Default Profile

&Y0
&Y1 Uses profile 1 on power-up.

Store Telephone Numbers (n=0 to3)

profile 0 in nonvolatile RAM. (default)
Writes the current active configuration to
profile 1 in nonvolatile RAM.

Uses profile 0 on power-up. (default)

&Zn Stores one of four dial strings (including a telephone number) of up to 38 dig­its in nonvolatile RAM.

For example: to store the telephone number 002852117 to RAM location 1, issue
the following command:

Command: AT&Z1=002852117 <CR>

16

COMMAND REFERENCE - 2

2.2b Commands Preceded by\

\An

Sets

Maximum MNP Block Size

maximum block size for MNP connections. Use this command to transmit

smaller blocks of data in a reliable link connection,

\A0
\A1
\A2
\A3

\Bn Transmit Break

Sets maximum block size to 64 characters.
Sets maximum block size to 128 characters.
Sets maximum block size to 192 characters.
Sets maximum block size to 256 characters
(default)

This command causes the modem to send a break (Attention signal), for a duration
specified by ’n’, to the remote modem. When n = 0, the default break length is used.

\Cn

n= 0-9

Set Auto-reliable Buffer (requires a license from Microcom ®

Break length in 100 msec.

In auto-reliable mode (\N3), this command determines the fallback method and
enables data buffering. The settings for this command are used by the modem

during the V.42 detection phase.

2 - COMMAND REFERENCE

17

\C0
\C1

\C2

\Gn

Modem to Modem Flow Control (XON/XOFF)

\G0 Disable flow control. (default)
\G1

Does not buffer data. (default)
Buffers data for four seconds until 200 characters

have been buffered or SYN character is detected,
then switches to reliable mode. If the buffer fills,
data is passed to the serial port.

S not buffer data. Switches to normal mode

Doe
upon receipt of auto-reliable fallback character and
passes it to serial port. This feature is used to allow
non-v.42 modems to connect immediately to a V.42
modem without data loss.

Enable flow control.

\Jn

\Kn

Enable/Disable DTE Auto Rate Adjustment

\J0
\J1

Disable adjustment of DTE speed to match
line speed. (default)
Enable adjustment of DTE speed to match line
speed.

Break Control

Defines what action the modem takes when a break (Attention signal) is sent or

received, as described below.

In Connect State, if reliable mode then transmit break to remote:

Enter command state, but do not send a break.

COMMAND REFERENCE - 2

18

n =

0,2,4