Datasheet XE3301I, XE3301G, XE3301F, XE3301B, XE3301 Datasheet (XECOM)

XECOM (1) XE3301

Multi-National 33,600 BPS Modem Module

XE3301

11-05-96

xecom

Description

Xecom's XE3301 is a complete 33,600 bps modem
in a single component. It is available for use in
many countries throughout the world. Xecom
offers versions for North America and Japan,
Germany, France, the United Kingdom and other
countries of the European Community.

The XE3301 is a complete modem including the
DAA. XE3301 users do not need to add RAM,
ROM, Crystals, transformers, or switches to
complete the modem design. The user only needs
to provide the TTL level, serial interface and the
telephone jack.

The XE3301 is a full-featured modem. Besides the
high-speed, XE3301 bps data transfer, the XE3301
supports data compression, error correction and
fax transfer. The XE3301 also inlcudes NVRAM
for permanent storage of the modem configuration.

The XE3301 is pin compatible with Xecom's
XE2401, XE9601 and XE1401 modems. This
family of modems permits a simple upgrade path
from 2400 bps to 33,600 bps.

Features

*

Models for North America, Japan, and Europe

Country Model
Canada XE3301
Japan XE3301
France XE3301F
Germany XE3301G
Italy XE3301I
UK XE3301B
USA

1

XE3301

1

(user transferable FCC Registration)

*

Small Size: 2.75 inches by 1.38" by 0.42"

*

Modem Protocols: V.34bis (33,600 bps), V.34,
V.32bis, V.32, V.22bis, V.22, V.21, Bell 212A
and 103

*

Fax Protocols: V.17 (14,400 bps), V.29, V.27ter,
and V.21 channel 2

*

Error Correction; V.42, MNP2-4 and MNP10

*

Data Compression; V.42bis and MNP5 provides
a maximum effective data rate of 133,400 bps.

*

Pin compatible upgrade for Xecom's XE2401,
XE9601, and XE1401 modems

Block Diagram

Modem

Controller

ROM

NVRAM

Analog

Front

End

DAA

/DTR
/RTS
/CTS
/DSR

TXD

RXD

/DCD

/RI

Serial I/O

RESET

AR

/LCS

OH

AMP

Tip

Ring

Auxiliary I/O

XECOM (2) XE3301

XE3301 Mechanical Specifications

A 2.74 2.760 69.60 70.10
B 1.370 1.390 34.80 35.31
C 0.400 0.420 10.16 10.67
D 0.890 0.910 22.61 23.11
E 1.890 1.910 48.01 48.51
F 0.125 0.200 3.18 5.08
G 0.080 0.100 2.03 2.54
H 0.415 0.435 10.54 11.05
J 0.090 0.110 2.29 2.79
K 0.020 0.025 0.51 0.64
L 0.380 0.400 9.65 10.16
M 0.090 0.110 2.29 2.79

Pins = 0.025 inch square pin
All pins tin-plated

INCHES METRIC(MM)

PIN MIN MAX MIN MAX

XE3301 PIN CONFIGURATION

RESET

N/C

RXD

/DTR
/LCS
/CTS

OH

TXD

/RTS

NC

/RI

TIP

RING

VCC
/DSR
/DCD

AMP
GND

1
2
3

9
10
11
12
13
14
15
16

18

20

40
39
38

22
21

XECOM (3) XE3301

1 RESET Hardware reset pin, Input, active High, TTL. A high on Pin 1 initiates a hardware

reset. An external reset is not required or recommended. The Reset pulse must be

a minimum of 100 milliseconds long.
2 N/C
3 RXD Received Data, Output, TTL. Serial data output to the host. A logic "High" on RXD

represents a "mark" and a logic "Low" represents a "space".
9 \DTR Data Terminal Ready, Input, active Low, TTL. The "AT&D" command sets the

function of DTR. The default, AT&D2, requires the host to assert DTR to permit a

modem link. The modem drops the call in progress if DTR is revoked and will not

connect until DTR is re-asserted.

10 \LCS Loop Current Sense, active Low Input, TTL. A low on \LCS tells the modem that

loop current is flowing through Tip and Ring. This feature is used only in the

XE3301B version.

11 \CTS Clear to Send, Output, active Low, TTL/CMOS. CTS is used as a Flow Control

output from the modem. The modem revokes CTS with hardware flow control active

to signal the host that the modem's input buffer is full. The modem reasserts CTS

when the buffer can accept more data without a buffer overflow.

12 OH Off-Hook, Output, active High. OH indicates the modem's hookswitch relay is

closed. Hookswitch closure connects the modem to the telephone line.

13 TXD Transmit Data, Input, TTL. Serial data input from the host. A logic "High" represents

a "mark" and a Low represents a"space", TTL.

14 \RTS Request to Send, input, active LOW, TTL. The XE3301 uses RTS for hardware flow

control. When RTS is revoked and hardware flow control is enabled, the modem will

not place data RXD.

15 NC No Internal Connection
16 \RI Ring Indicator, Output, active Low, TTL. When low indicates the modem is receiving

a ring signal.

18 TIP Tip connection to the phone line(RJ11 pin3) from the internal DAA. The XE3301 is

not sensitive to the battery voltage polarity across Tip and Ring.

20 RING Ring connection to the phone line(RJ11 pin4) from the internal DAA.
21 GND Ground (0 volts)

PIN NAME DESCRIPTION

XE3301 Pin Descriptions

XECOM (4) XE3301

PIN NAME DESCRIPTION

XE3301 Pin Descriptions

22 AMP Audio Output function is set by L & M commands and the value in register S22. This

output can drive a minimum load of 300 ohms.

38 \DCD Data Carrier Detect, Output, active Low, TTL/CMOS. &C sets the DCD function. In

the default condition, AT&C1, DCD indicates the presence of a carrier signal on the

telephone line.

39 \DSR Data Set Ready, Output, active Low, TTL/CMOS. &S sets the DSR function. In the

default condition, AT&S0, DSR is forced true.

40 Vcc +5 Volts

ABSOLUTE MAXIMUM RATINGS*

SUPPLY VOLTAGE - Vcc +6.5 Volts

DC INPUT VOLTAGE -0.6 Volts to +6.5 Volts

STORAGE TEMPERATURE RANGE -25° C TO +85° C

LEAD TEMPERATURE (Soldering, 2 sec per wave) 260° C

OPERATING TEMPERATURE RANGE 0 TO 70° C

*Exceeding these values may result in permanent damage to the device.

XE3301 ELECTRICAL SPECIFICATIONS

VCC 4.75 5.25 Volts
ICC 170 200 220 mamps On Line

50 mamps Idle

Ring Voltage Detected 38 150 RMS XE3301

10 RMS XE3301B, XE3301I

20 RMS XE3301G
Ring Frequency Detected 15.3 68 Hz
Telephone Loop Current 10 100 mamps XE3301

10 120 mamps XE3301B, XE3301I

10 60 mamps XE3301G

10 45 mamps XE3301F
Data Transmit level -12 -10.5 -9.0 dBm
DTMF Transmit Level -2.5 0 dBm Avg over 3 second interval
Billing tone Filter 16 KHz XE3301G Only

Parameter Min Typ Max Units Comments

XECOM (5) XE3301

XE3301 Typical Applications Schematic

Note: RJ11 Pin assignments reflect a 6-pin connector. Tip and Ring are always the center pins of the

RJ11 jack.

Recommended Parts

Reference Designation Description Recommended Part Number

L1, L2 Ferrite Beads TDK CB30-1812

C1, C2 Capacitors Sprague 30GAT47, 470 pfd, 3000 Volts

J1 RJ11 Jack Stewart SS6446NF

XECOM (6) XE3301

XE3301 AT Commands

Modes of Operation

The XE3301 uses "AT" commands for control and

configuration. The XE3301 operates in three
modes; Command Mode, Fax Mode and Data
Mode. Extensions to the AT command set support

fax operation.

Data Mode: The modem enters data mode after it
establishes a link and issues a "CONNECT" result
code. In Data Mode the modem modulates all
signals on Transmit Data, Pin 13, and sends them
to the remote modem. The modem demodulates
the signal from the remote modem and places it
onto Received Data, Pin 3, for the host equipment.
When the modem exits data mode, it issues a "NO
CARRIER" result code.

Command Mode: The XE3301 enters command
mode on application of power, reset, loss of the
connection, or receipt of the escape sequence. In
command mode the modem accepts commands
from the host on Transmit Data. Appropriate
result codes are returned on Received Data at the
same speed and parity as the commands.

Fax Mode: The modem enters fax mode on
receipt of the AT+FCLASS=1 command. Fax
commands and responses are issued at 19,200
bits per second; the character format is 8 bits no
parity. The modem accepts Class 1 Fax
commands only in fax mode. The A/, ATO, AT&T
and escape commands are not valid in fax mode.

Commands

The modem is configured and controlled with AT
commands. AT commands follow a strict format.
The command line is stored in the command
buffer and executed upon receipt of a carriage
return. Until executed, the command line can be
edited with the backspace key.

Command Format - Each command, except A/,
begins with the AT prefix. The "A" and "T" may be
both upper case or both lower case but cannot be
of different cases. The modem uses the prefix to
identify the host's speed and parity. The modem
determines speed by measuring the width of the
incoming bits and parity by comparing the parity
bits of the "A" and "T." The modem then returns
result codes at the host's speed and parity.

Command Line - A command line may include
multiple commands. The modem executes the
commands in the sequence they appear in the
command line. Spaces, inserted to improve
legibility, do not fill space in the command buffer.
A carriage return terminates the command line and
causes the commands to be executed. Register
S3 allows the user to select a character other than
a carriage return to terminate the command line.

Command Buffer - The command buffer holds 40
characters, including the AT prefix. If it overflows,
the modem issues an "ERROR" result code and
commands are not executed.

Command Line Editing - A backspace can be
used to edit the command any time before it is
executed. The backspace character, Control and
H simultaneously on some systems, erases the
previous character in the command line. Any
character except for the "A" and "T" can be erased.
Register S5 allows the user to select a character
other than a backspace to edit the command line.

Re-Execute Last Command - The A/ command
causes the modem to re-execute the command
line stored in the command buffer. This is the only
command which does not require the "AT" prefix.

Omitted Parameters - Most commands include a
parameter which determines the command
function. When the parameter is omitted from the
command string, it is assumed to be a 0.

XECOM (7) XE3301

Escape Characters - A three character escape

sequence, entered while in data mode, will switch
the modem into command mode while remaining
on line. The escape character, set by Register S2,
is entered 3 times in succession to execute the

escape. The default escape sequence is "+++."

Result Codes - The modem issues a result code

after each action. Result codes may be provided
as full words, numeric codes or may be disabled.
Each result code ends with a carriage return when
numeric result codes are chosen. When full word
result codes are chosen, a Line Feed and Carriage
Return precede and follow each result code.

List of Commands

An asterisk indicates the default setting of the
command for the XE3301. The default setting may
be different for the European models.

A - Answer Command - ATA forces the modem
to immediatly go off-hook and begin transmittting
the answer tone sequence.

Bn - Select Communications Standard - ATBn
selects the modulation scheme used for
connections below 2400 bits per second

n=0 Selects CCITT standards
n=1 Selects Bell standards*

D - Dial Command - Below are the characters
accepted in a dialing command.
0-9, #, * =Dialing Digits

L = Re-dial last number
P = Pulse dial
T = Tone dial

S=n = Dial stored number

W = Wait for dial tone
^ = Toggles state of calling tone
, = Pause for the duration of S8
@ = Wait for silence
! = Switch hook flash
; = Return to the command state

En - Command Echo - ATEn determines whether
commands will be echoed back to the host.

n=0 Do not echo commands
n=1 Enable command echo*

Hn - Switch Hook Control - ATHn opens and
closes the modem's hook switch.

n=0 Switch hook relay opens
n=1 The switch hook relay closes

In - Modem Identification - ATIn Identifies the
version of the modem.

Ln - Speaker Volume - ATLn sets the amplitude
of the modem's audio output.

n=0 Lowest speaker volume
n=1 Low speaker volume*
n=2 Moderate speaker volume
n=3 High speaker volume

Mn - Speaker Activity - ATMn determines when
the modem's audio output is active.

n=0 Speaker off
n=1 Speaker on until carrier received*
n=2 Speaker remains on
n=3 Speaker off during dialing, on until carrier

Nn - Data Rate - ATNn selects whether or not
the modem will negotiate a lower data link speed.

n=0 Handshake only at DTE rate
n=1 Negotiate highest common speed*

On - On Line - ATOn switches the modem from
the command mode to the data mode.

n=0 Return On Line with no retrain*
n=1 Initiate retrain returning On Line.

Qn - Responses - ATQn determines if the
modem will issue responses.

n=0 Send responses*
n=1 No Responses

Sr? - Interrogate Register - ATSr? requests the
current value in register Sr.

XE3301 AT Commands (continued)

XECOM (8) XE3301

Sr=n - Set Register Value - ATsr=n sets the value
of register Sr to n.

Vn - Result Codes - ATVn sets the modem to
issue Numeric or Full Word result codes .

n=0 Numeric Result Codes

n=1 English Word Result Codes*

Wn - Connect Message Rate - ATWn determines

whether the data rate reported in the Connect
response is the host data rate, the link data rate or
whether both are provide along with the error
control and data compression protocols
negotiated.

n=0 Send "CONNECT" at DTE Rate*

n=1 Report line speed, DTE speed and Link

protocol

n=2 "CONNECT" Reports Link speed

Xn - Result Code Set - ATXn selects which set of
result codes the modem may send.

n=0 Result codes 0 to 4
n=1 Result codes 0 to 5 and 10
n=2 Result codes 0 to 6 and 10
n=3 Result codes 0 to 5, 7 and 10
n=4 Full Result codes*

Yn - Long Space Disconnect - ATYn determines

if the modem will automatically disconnect if a
continuous space is received for 1.6 seconds.

n=0 Long Space Disconnect Disabled*
n=1 Disconnect on long space

Zn - Reset - ATZn executes a soft reset to the

modem and resets the modem configuration.

n=0 Reset to user profile 0*
n=1 reset to user profile 1

&Cn - DCD Operation - AT&Cn determines the
operation of the DCD output.

n=0 DCD is forced active.
n=1 DCD indicates a valid carrier*

&Dn - DTR - AT&Dn determines how the modem
will respond to changes to DTR.

n=0 DTR is ignored by the modem.
n=1 Enter command mode if DTR revoked.
n=2 Disconnect if DTR revoked.*
n=3 Soft reset when DTR revoked

&Fn - Return to Factory Defaults - AT&Fn
returns the modem configuration to one of two
factory configurations.

n=0 Restore configuration 0*
n=1 Restore configuration 1

&Gn - Guard Tone - AT&Gn controls the guard
tone produced by the modem

n=0 Guard Tone Disabled*
n=1 Guard Tone Disabled
n=2 1800 Hz Guard Tone

&Kn - Flow Control - AT&Kn selects the flow
control method used by the modem.

n=0 Disabled
n=3 RTS/CTS
n=4 XON/XOFF
n=5 Transparent XON/XOFF
n=6 RTS/CTS and XON/XOFF

&Pn - Dial Pulse Make/Break Ratio - AT&Pn
determines the specific pulse dialing parameters
used by the modem.

n=0 39/61% @ 10 pps*
n=1 33/67% @ 10 pps
n=2 39/61% @ 20 pps
n=3 33/67% @ 20 pps

&Qn - Line Connection - AT&Qn determines if
error control or data buffering aare active on the
link.

n=0 Direct mode (no data buffering)*
n=5 Use Error Correction
n=6 Normal Mode (Speed buffering)

XE3301 AT Commands (continued)

XECOM (9) XE3301

&Sn - DSR Operation - AT&Sn sets the operation
of the DSR signal.

n=0 DSR always active*
n=1 DSR in accordance with V.25.

&Tn - Test Modes - AT&T selects modem test

modes.

n=0 Exit test mode
n=1 Local analog loopback
n=3 Initiate local digital loopback
n=4 Respond to remote loop request*
n=5 Deny remote loop request
n=6 Initiate a Remote Digital loopback
n=7 Remote digital loopback w self-test
n=8 Local analog loopback w self-test

&Vn - View Configuration Profiles - AT&V

permits the user to check on the modems current
configuration.

n=0 View active profile & user profile 0*
n=1 View active profile & user profile 1

&Wn - Store Active Profile - AT&Wn stores the
current modem configuration in NVRAM.

n=0 Store active profile as profile 0*
n=1 Store active profile as profile 1

&Yn - Recall Stored Profile - AT&Yn sets the
stored modem configuration to be used after a
hard reset.

n=0 Recall profile 0 on power-up*
n=1 Recall profile 1 on power-up

&Zn=x - Store telephone number "x" in

memory location "n"

%En - Line Quality Monitor/Auto Retrain -

AT%En determines if the modem will monitor line
quality during a connection and intiate a retrain if
quality drops below acceptable levels.

n=0 Disabled
n=1 Enabled
n=2 Line quality, fallback, fall forward

%L - Read Received Signal Level - AT%L
permits the user to read the magnitude of the
recevie singal in dBm.

%Q - Read Line Signal Quality - AT%Q permits
the user to read the EQM value of the recevied
signal.

\An - MNP Block Size - AT|An sets the block
size for MNP data packets.

n=0 Maximum 64 characters
n=1 Maximum 128 characters
n=2 Maximum 192 characters
n=3 Maximum 256 characters*

\Bn - Transmit Break - AT\Bn selects the
duration of the break signal sent. Break = n x 100
msec.

\Kn - Break control - AT\Kn determines how the
modem will handle a break signal.

Break received from host with Reliable link.

n=0 Enter on-line command mode; do not

transmit break

n=1 Purge buffers, immediately transmit

break
n=2 Same as n=0
n=3 Immediately send break
n=4 same as n=0
n=5 Send break in sequence with data*

Break received from host with Direct link .

n=0 Immediately transmit break, then enter

on-line command mode
n=1 Immediately send break
n=2 Enter command mode but do not transmit

break signal
n=3 same as n=1
n=4 same as n=0
n=5 same as n=1*

XE3301 AT Commands (continued)

XECOM (10) XE3301

Break received from modem w Normal link.

n=0 Purge buffers, Immediately send break to

the host
n=1 same as n=0
n=2 Immediately send break to the host
n=3 Same as n=2
n=4 Send break in sequence with data.
n=5 Same as n=2*

Host initiates break with \B command on
Reliable link.

n=0 Purge buffers and immediately transmit

break
n=1 Same as n=0
n=2 Immediately transmit break
n=3 Same as n=1
n=4 Transmit break in sequence w data
n=5 Same as n=4

\Nn - Error Control Selection - AT\Nn
deteermines how the modem will handle error
control negotiations.

n=0 Normal mode, no error correction
n=1 Direct mode, no buffering, no error

correction

n=2 Reliable mode, error correction required

for connection

n=3 V.42 Auto-reliable mode, accept either an

error controlled or non-error controlled

link*
n=4 V.42 Reliable mode, LAPM required
n=5 MNP required

\Vn - Single Line Result Codes - AT/Vn
determines if the Connect response will be issued
in a single line format. The single line format is
shown. CONNECT<DTE Speed><Modulation>
<Protocol><Compression><Link Speed>

n=0 Responses per ATX, ATW and S95*
n=1 Single Line Responses

-Kn - MNP Extended Services - AT-Kn
determines how the modem handles MNP10.

n=0 No LAPM to MNP10 conversion
n=1 LAPM to MNP10 conversion*
n=2 LAPM to MNP10 conversion but no MNP

Extended Service during V.42 LAPM
answer mode detect.

XE3301 AT Commands (continued)

XECOM (11) XE3301

XE3301 AT Commands (continued)

Class 1 Fax Commands

The Class 1 Fax Commands are used to control
the modem in Fax Mode.

AT+FCLASS? - Service Class Indication

n=0 Configured as a data modem
n=1 Configured for Service Class 1.

AT+FCLASS=? - Shows Service Class Capability

n=0 Configured as a data modem
n=1 Configured for Service Class 1.

AT+FCLASS=n - Sets Service Class

n=0 Configured as a data modem
n=1 Configured for Service Class 1.

AT+FAE=n - Selects Data/Fax Auto Answer

n=0 Answer as a fax modem only
n=1 Either a fax or data modem

AT+FRS=n - Receive Silence

This command causes the modem to issue an
OK response after detecting silence for n * 10
milliseconds.

AT+FTS=n - Stop Transmission and Wait

This command causes the modem to stop
transmission for n * 10 milliseconds before
issuing the OK response

AT+FRH=n - Receive HDLC Data Frames

n=3 V.21 Channel 2, 300 bps

n=24 V.27ter, 2400 bps

n=48 V.27ter, 4800 bps

n=72 V.29, 7200 bps

n=73 V.17, long training, 7200 bps

n=74 V.17, short training, 7200 bps

n=96 V.29, 9600 bps

n=97 V.17, long training, 9600 bps

n=98 V.17 short training, 9600 bps

n=121 V.17, long training, 12,000 bps

n=122 V.17 short training, 12,000 bps

n=145 V.17, long training, 14,400 bps

n=146 V.17 short training, 14,400 bps

AT+FRM<mod> - Receive Fax

n=24 V.27ter, 2400 bps
n=48 V.27ter, 4800 bps
n=72 V.29, 7200 bps
n=73 V.17, long training, 7200 bps
n=74 V.17, short training, 7200 bps
n=96 V.29, 9600 bps
n=97 V.17, long training, 9600 bps
n=98 V.17 short training, 9600 bps
n=121 V.17, long training, 12,000 bps
n=122 V.17 short training, 12,000 bps
n=145 V.17, long training, 14,400 bps
n=146 V.17 short training, 14,400 bps

AT+FTH=n- Transmit HDLC Data

n=3 V.21 Channel 2, 300 bps
n=24 V.27ter, 2400 bps
n=48 V.27ter, 4800 bps
n=72 V.29, 7200 bps
n=73 V.17, long training, 7200 bps
n=74 V.17, short training, 7200 bps
n=96 V.29, 9600 bps
n=97 V.17, long training, 9600 bps
n=98 V.17 short training, 9600 bps
n=121 V.17, long training, 12,000 bps
n=122 V.17 short training, 12,000 bps
n=145 V.17, long training, 14,400 bps
n=146 V.17 short training, 14,400 bps

AT+FTM<mod> - Transmit Fax

n=24 V.27ter, 2400 bps
n=48 V.27ter, 4800 bps
n=72 V.29, 7200 bps
n=73 V.17, long training, 7200 bps
n=74 V.17, short training, 7200 bps
n=96 V.29, 9600 bps
n=97 V.17, long training, 9600 bps
n=98 V.17 short training, 9600 bps
n=121 V.17, long training, 12,000 bps
n=122 V.17 short training, 12,000 bps
n=145 V.17, long training, 14,400 bps
n=146 V.17 short training, 14,400 bps

XECOM (12) XE3301

XE3301 AT Commands (continued)

S-Registers

Following are descriptions of the S-Registers
Supported by the XE3301.

S0 Answer on nth Ring: S0 sets the modem

to automatically answer on the nth ring.
Setting S0 to 0 disables automatic answer.

Range: 0 to 255
Units Rings
Default 0

S1 Ring Count: S1 is a read-only register. It

shows the number of rings detected. If a
ring is not detected within 8 seconds, the
counter is reset to zero.

Range: 0 to 255
Units Rings
Default 0

S2 Escape Character: S2 determines the

ASCII character used in the escape
sequence. Values of 0-127 select valid
ASCII escape characters; values from 128 to
255 disable the escape sequence.

Range: 0 to 255
Units ASCII Character
Default 43 (+)

S3 Carriage Return Character: S3 determines

the ASCII character to serve as a carriage
return to terminate commands and to be
inserted in modem responses.

Range: 0 to 127
Units ASCII Character
Default 13 (Carriage Return)

S4 Line Feed Character: S4 sets the ASCII

character to act as a line feed character in
modem responses.

Range: 0 to 127
Units ASCII Character
Default 10 (Line Feed)

S5 Back Space Character: S5 defines the

ASCII character used as a backspace to edit
the command line.

Range: 0 to 32
Units ASCII Character
Default 8 (Back Space)

S6 Dial Tone Wait Time: S6 determines how

long the modem waits for dial tone before
dialing begins. The Dial Tone Wait Time
cannot be set to less than two seconds.

Range: 2 to 255
Units Seconds
Default 2

S7 Wait for Carrier after Dialing: S7

determines how long the modem waits for a
valid carrier signal after dialing is completed.

Range: 1 to 255
Units Seconds
Default 50

S8 Comma Pause Time: S8 defines the

duration of the pause initiated by a comma in
the dialing string. The pause is generally
used when waiting for a second dial tone.

Range: 1 to 255
Units Seconds
Default 50

S9 Carrier Detect Response Time: S9

establishes the length of time the remote
modem's carrier must be present to be
recognized as valid.

Range: 1 to 255
Units 0.1 Seconds
Default 6

XECOM (13) XE3301

S10 Carrier Off Disconnect Delay: S10 selects

how long carrier must be lost before the
modem disconnects. Note: If S10 is smaller
than the value of S9, the modem will not
automatically disconnect on loss of carrier.

Range: 1 to 255
Units 0.1 Seconds

Default 14

S11 Tone Dialing Speed: S10 sets the duration

and spacing of the dialing tones. S11 does

not affect the pulse dialing rate.

Range: 50 to 255
Units 1 Millisecond
Default 95

S12 Escape Code Guard Timer: S12 sets the

escape sequence guard timer. If characters
are received before or after the escape

sequence, within the guard timer, the
modem aborts the escape attempt and
remains in data mode.

Range: 0 to 255
Units 0.02 Seconds
Default 50

S14 General Bit-Mapped Options: S14 reflects

the state of several "AT" commands.
Bit 0 Not Used
Bit 1 0 = Echo Disabled (ATE0)

1 = Echo Active (ATE1)

Bit 2 0 = Send Result Codes (ATQ0)

1 = No Result Codes (ATQ1)

Bit 3 0 = Numeric Result Codes (ATV0)

1 = Full Word Result Codes (ATV1)
Bit 4 Not Used
Bit 5 0 = Tone Dialing Selected (T)

1 = Pulse Dialing Selected (P)

Bit 6 Not Used
Bit 7 0 = Answer

1 = Originate

S16 Test Status: S16 shows the test status of

the modem.
Bit 0 0 = No Local Analog Loopback

1 = Local ALB Active
Bit 1 Not Used
Bit 2 0 = Local Digital Loopback Disabled

1 = Local DLB Enabled
Bit 3 0 = No Remote Digital Loopback

1 = Remote DLB Active
Bit 4 0 = Remote DLB not requested

1 = Remote DLB Requested
Bit 5

0 = Remote DLB w Self-Test Disabled

1 = Remote DLB w Self-Test Enabled
Bit 6

0 = Local ALB w Self-Test Disabled

1 = Local ALB w Self-Test Enabled
Bit 7 Not Used

S18 Test Timer: S18 determines the duration of

any test mode. If S18 equals 0, the AT&T0
command terminates the test.

Range: 0 to 255
Units Seconds
Default 0

S21 General Bit-Mapped Options: S21 reflects

the state of several "AT" commands.
Bit 0-2 Not Used
Bit 3,4 0 = DTR ignored (AT&D0)

1 =

Enter command mode on DTR off

(AT&D1)
2 = Disconnect on DTR off (AT&D2)
3 = Reset on DTR off (AT&D3)

Bit 5 0 = DCD always active (AT&C0)

1 = DCD on with Carrier (AT&C1)

Bit 6 0 = DSR always active (AT&C0)

1= DSR on when modem ready

(AT&C1)

Bit 7 0 = No disconnect on Space (ATY0)

1 = Disconnect on Space (ATY1)

XE3301 AT Commands (continued)

XECOM (14) XE3301

S22 General Bit-Mapped Options: S22 reflects

the state of several "AT" commands.
Bit 0-1 0 = Low speaker volume (ATL0)

1 = Low speaker volume (ATL1)
2

= Moderate speaker volume (ATL2)

3 = High speaker volume (ATL3)

Bit 2-3 0 = Speaker off (ATM0)

1 = Speaker off with carrier (ATM1)
2 = Speaker always on (ATM2)
3 = Speaker on during handshake

(ATM3)

Bit 4-6 0 = Basic Result codes (ATX0)

4

= Connect speed result codes (ATX1)
5 = No Blind Dial (ATX2)
6 = Busy Detection (ATX3)
7 = Full result codes (ATX4)

Bit 7 Not Used

S23 General Bit-Mapped Options: S23 reflects

the state of several "AT" commands.

Bit 0 0 = Remote DLB Disabled (AT&T5)

1 = Remote DLB Allowed (AT&T4)

Bit 1-3 0 = Host Interface at 300 bps

1 = Host Interface at 600 bps
2 = Host Interface at 1200 bps
3 = Host Interface at 2400 bps
4 = Host Interface at 4800 bps
5 = Host Interface at 9600 bps
6 = Host Interface at 19200 bps
7 = Host I/F at 38400 bps or higher

Bit 4-5 0 = Even parity in use

1 = Not used
2 = Odd Parity in use
3 = No Parity in use

Bit 6-7 0 = No Guard Tone (AT&G0)

1 = No Guard Tone (AT&G1)
2 = 1800 Hz guard tone (AT&G2)
3 = Not Used

S24 Sleep Inactivity Timer: S24 sets the length

of time the modem will remain inactive
before it enters the low power sleep mode.
If S24 equals 0 sleep mode is disabled.

Range: 0 to 255
Units 1 Seconds
Default 0

S27 General Bit-Mapped Options: S27 reflects

the state of several "AT" commands.
Bit 0 1 3

0 0 0 = Normal Mode (AT&Q0)
1 0 1

= Error control enabled (AT&Q5)

0 1 1

= Direct Mode (AT&Q6)
Bit 2 Not Used
Bit 4-5 Not Used
Bit 6 0 = CCITT Protocols (ATB0)

1 = Bell Protocols (ATB1)

Bit 7 Not Used

S28 Pulse Dialing Bit-Mapped Options: S28

stores the modem's pulse dialing
configuration.

Bit 0-2 Not Used
Bit 3-4 0 = Make/Break ratio 39%/61%; 10

pulses per second (AT&P0)

1 = Make/Break ratio 33%/67%; 10

pulses per second (AT&P1)

2 = Make/Break ratio 39%/61%; 20

pulses per second (AT&P2)

3 = Make/Break ratio 33%/67%; 20

pulses per second (AT&P3)

Bit 5-7 Not Used

S29 Hook Flash Timer: S29 determines the

length for time the modem will close its off­hook relay on reciept of the "!" dial modifier
to simulate a switch hook flash.

Range: 0 to 255
Units 10 milliseconds
Default 70

XE3301 AT Commands (continued)

XECOM (15) XE3301

XE3301 AT Commands (continued)

S30 Disconnect on Inactivity Timer: S30 sets

the modem to disconnect after the given
time period with no data being sent or

received. A 0 disables the inactivity timer.
Range: 0 to 255

Units 10 Seconds

Default 0

S31 General Bit-Mapped Options: S31 stores

the status of various AT commands.

Bit 0 0 =

No single-line Connect messages

(AT\V0)

1 =

Use single-line connect messages
(AT\V1)

Bit 1 0 = No Automode detection (ATN0)

1 =

Automode detection active (ATN1)

Bit 2-3 0 = Report host speed (ATW0)

1 = Report all parameters (ATW1)
2 =

Report modem speed only (ATW2)

Bit 4-7 Not Used

S32 XON Character: S32 determines the ASCII

character to be sent as XON for in-band flow
control.

Range: 0 to 255
Units ASCII Character
Default 11 (VT)

S33 XOFF Character: S32 determines the

ASCII character to be recognized as XOFF
for in-band flow control.

Range: 0 to 255
Units ASCII Character
Default 19 (DC3)

S36 LAPM Failure: S36 instructs the modem

what to do if the error control negotiations
fail.

Bit 0-2 0 = Modem Disconnects

1 = Establish Direct Connection
3 = Establish normal Connection
4 = Disconnect if MNP handshake

fails

5 = Establish Direct Connection if

MNP handshake fails.

7 = Establish Normal Connection if

MNP handshake fails.

Bit 3-7 Not Used

S38 Forced Disconnect Timer: S38 sets the

delay between receipt of the command to
disconnect and the actual opening of the
switch hook. If S38 is set to 255 the modem
disconnects only after its buffers are empty.

Range: 0 to 255

Units 1 Second
Default 20

S39 Flow Control Bit-Mapped Options: S39

shows the status of the modem's flow
control options, AT&K.

Bit 0-2 0 = Flow Control Disabled

3 =

Hardware Flow Control, RTS/CTS

4 =

In-Band Flow Control XON/XOFF

5 =

Transparent In-Band Flow Control

6 = Both Harware and In-Band Flow

Control

Bit 3-7 Not used

XECOM (16) XE3301

XE3301 AT Commands (continued)

S40 MNP Bit-Mapped Options: S40 shows the

status of the modem's MNP commands, .
Bit 0-1 0 = No LAPM to MNP10 conversion

(AT-K0)

1 = Enable LAPM to MNP10

conversion (AT-K1)

2 = Enable LAPM to MNP10

conversion except for LAPM
answer mode (AT-K1)

Bit 2 Not Used

Bit 3-5 0 = AT\K0 break handling selected

1 = AT\K1 break handling selected
2 = AT\K2 break handling selected
3 = AT\K3 break handling selected
4 = AT\K4 break handling selected
5 = AT\K5 break handling selected

Bit 6-7 0 = MNP Block size 64 characters

1 = MNP Block size 128 characters
2 = MNP Block size 192 characters
3 = MNP Block size 256 characters

S41 General Bit-Mapped Options: S41 stores

the condition of various "AT" commands.
Bit 0-1 0 = No Data Compression (AT%C0)

1 = MNP5 Data Compression

(AT&C1)

2 = V.42bis Data Compression

(AT&C2)

3 = Either MNP5 or V.42bis Data

Compression (AT&C3)

Bit 2, 6

0 0 = No Fallback/Forward (AT%E0)
1 0 = Retrain Enabled (AT%E1)
0 0 = Fallback/Forward Enabled

(AT%E2)

Bit 3-5, 7 Not Used

S46 Data Compression Control: S46 selects

whether or not the modem will support data
compression with error control.

S46=136 No data compression
S46=138 Data Compression selected

Default 138

S48 V.42 Negotiations: S48 determines the

modem's V.42 negotiation process.

S48=0 Proceed with LAPM
S48=7 Negotiate per V.42

S48=128 Assume LAPM failure

Default 7

S86 Call Failure Code: S86 shows why the last

"NO CARRIER response was issued.

S86=0 Normal Disconnect
S86=4 Loss of Carrier
S86=5 V.42 Negotiation Failure
S86=9 Modem Handshake Failure

S86=12 Disconnect Initiated by remote

modem
S86=13 No response after 10 retries
S86=14 Protocol Violation

S95 Extended Result Codes: S95 permits the

user to customize the extended result
codes.
Bit 0 Connect result code shows link

speed
Bit 1 Add /ARQ to connect response
Bit 2 Add /VFC to Carrier response
Bit 3 Enable Protocol response
Bit 4 Not Used
Bit 5 Enable Compression Result Code
Bit 6 Not used
Bit 7 Not Used

XECOM (17) XE3301

XE3301 Result Codes

Digits Verbose Description

0 OK Successfully executed

command line
1 CONNECT 300 bps connection
2 RING Ring signal detected
3 NO CARRIER Carrier not detected/lost
4 ERROR Error in command line
5 CONNECT 1200 1200 bps connection
6 NO DIAL TONE No dial tone detected
7 BUSY Busy signal detected
8 NO ANSWER 5 second silence not

detected

10 CONNECT 2400 2400 bps Connection
11 CONNECT 4800 4800 bps Connection
12 CONNECT 9600 9600 bps Connection
13 CONNECT 7200 7200 bps Connection
14 CONNECT 12000 12,000 bps Connection
15 CONNECT 14400 14,400 bps Connection
16 CONNECT 19200 19,200 bps Connection
17 CONNECT 38400 38,400 bps Connection
18 CONNECT 57600 57,600 bps Connection
19 CONNECT 115200 115200 bps Connection
22 CONNECT 75TX/1200RX

V.23 originate connection

23 CONNECT 1200TX/75RX

V.23 answer connection

33 FAX Fax connection
35 DATA Data connection in Fax

mode

40 CARRIER 300 300 bps carrier received
44 CARRIER 1200/75 V.23 reverse channel

carrier received

45 CARRIER 75/1200 V.23 forward channel

carrier received

46 CARRIER 1200

1200 bps carrier received

47 CARRIER 2400

2400 bps carrier received

Digits Verbose Description

48 CARRIER 4800

4800 bps carrier received

49 CARRIER 7200

7200 bps carrier received

50 CARRIER 9600

9600 bps carrier received

51 CARRIER 12000

12,000 bps carrier received

52 CARRIER 14400

14,400 bps carrier received

53 CARRIER 16800

16,800 bps carrier received

54 CARRIER 19200

19,200 bps carrier received

55 CARRIER 21600

21,600 bps carrier received

56 CARRIER 24000

24,000 bps carrier received

57 CARRIER 26400

26,400 bps carrier received

58 CARRIER 28800

28,800 bps carrier received
59 CONNECT 16800 16,800 bps Connection
61 CONNECT 21600 21,600 bps Connection
62 CONNECT 24000 24,000 bps Connection
63 CONNECT 26400 26,400 bps Connection
64 CONNECT 28800 28,800 bps Connection
66 COMPRESSION: CLASS 5

MNP5 data compression

67 COMPRESSION: V.42bis

V

.42bis data compression

69 COMPRESSION: NONE

No data compression
76 PROTOCOL: NONE No error correction
77 PROTOCOL: LAPM LAPM error correction
80 PROTOCOL: ALT MNP error correction
81

PROTOCOL: ALT CELLULAR

MNP10 error correction

+F4 +FCERROR Fax carrier error

XECOM (18) XE3301

Using the XE3301 in the US

All equipment connected to the public telephone network
in the United States must have FCC Part 68
Registration. Part 68 registration certifies that the device
will not cause harm to the telephone network. The
XE3301 provides a user transferable FCC Registration.
This permits XE3301 customers to use our FCC
registration number without submitting their systems for
additional testing. Call Xecom technical support at 408­945-6640 with any questions on whether your system
qualifies to use Xecom's FCC Registration Number.

In your operating instructions you must provide certain
information to the end user of the modem. The
instructions should include most of the instructions
shown below. Only the information regarding the
mounting of the device in the final assembly should be
omitted.

FCC Instructions:

T

his product complies with Part 68 of the FCC Rules and
Regulations. On each device shipped, there is a label
which contains, among other information, the FCC
Registration Number and Ringer Equivalence Number
(REN) for this product. You must, upon request, provide
this information to your telephone company.

The mounting of this device in the final assembly must
be made in such a manner as to preserve the high
voltage protection between the TIP/RING Connection
and the rest of the system. Typically, this may be
accomplished by maintaining a minimum spacing .100
mils between the TIP/RING Traces to the RJ-11C Jack
and low voltage portion of the system. No additional
circuitry may be attached between TIP/RING and the
telephone line connection, unless specifically allowed in
the rules.

The REN is useful to determine the quantity of devices
you may connect to a telephone line and still have all of
these devices ring when the number is called. In most,
but not all areas, the sum of the RENs of all devices
connected to one line should not exceed five (5.0). To be
certain of the number of devices you may connect to the
line, as determined by the REN, you should contact the
local telephone company to determine the maximum
REN for your calling area.

If your system causes harm to the telephone network,
the telephone company may discontinue service
temporarily. If possible, they will notify you in advance. If
advance notification is not practical, you will be notified
as soon as possible.

Your telephone company may make changes in its
facilities, equipment, operations or procedures that could
affect proper functioning of your equipment. If they do,
you will be notified in advance to give you an opportunity
to maintain uninterrupted telephone service.

If you experience trouble with this device, please contact
XECOM at [phone] for assistance. The
telephone company may ask you to disconnect this
device from the network until the problem has been
corrected or until you are sure that the device is not
malfunctioning.

The device may not be used on coin service lines
provided by the telephone company (this does not apply
to private coin telephone applications which use
standard telephone lines). Connection to party lines is
subject to state tariffs.

FCC Labels:

FCC rules also require a label which is visible from the
outside of the equipment. The label should display
Xecom's name as holder of the FCC Registration, the
FCC Registration Number and Ringer Equivalence of the
modem. This is the same information which appears on
the top of each XE3301 module.

XECOM (19) XE3301

Devices sold by XECOM are covered by the warranty provisions appearing in its Terms of Sale only. XECOM
makes no warranty, express, statutory, implied, or by description regarding the information set forth herein, or
regarding the freedom of the described devices from patent infringement. XECOM makes no warranty of

merchantability or fitness for any purposes. XECOM reserves the right to discontinue production and change
specifications and prices at any time and without notice. This product is intended for use in normal commercial
applications. Applications requiring extended temperature range, unusual environmental requirements, or high

reliability applications, such as military, medical life-support or life-sustaining equipment, are specifically not

recommended without additional processing and authorization by XECOM for such application.

Xecom assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xecom product. No
other circuits, patents, or licenses are implied.

Xecom's products are not authorized for use as Critical Components in Life Support Devices or Systems.

Life Support Devices or Systemsare devices or systems which, (a) are intended for surgical implant into the

body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions
provided in the labeling, can be reasonably expected to result in significant injury to the user.

A Critical Component is any component of a life support device or system whose failure to perform can be
reasonably expected to cause failure of the life support device or system, or to affect its safety or effectiveness.

Terms of Sale

Life Support Policy

Copyright, Xecom © 1996
While Xecom, Inc. has made every effort to ensure that the information presented here is accurate, Xecom will not
be liable for any damages arising from errors or omission of fact. Xecom reserves the right to modify specifications
and/or prices without notice. Product mentioned herein are used for identification purposes only and may be
trademarks and/or registered trademarks of their respective companies.

Xecom Incorporated

374 Turquoise Street,Milpitas, CA 95035

Ph:408-945-6640 Fax:[phone]

xecom