Datasheet XE1414C-ITR, XE1414C Datasheet (XECOM)

XE1414C

Worldwide 14.4 KBPS Modem Module for Embedded Applications

5/2002

Description

Xecom's XE1414C is a complete, 14.4 Kbps modem in a
single component. Xecom designed the XE1414C for
use throughout North America, Europe and Japan. It
includes user transferrable FCC Part 68 Registration for
direct connection to telephone lines in the United States
and is compliant with CTR21.

The XE1414C is a complete modem packaged in a
compact module. The XE1414C includes all required
modem circuits including the DAA. XE1414C users do
not need to add RAM, ROM, Crystals, low distortion
transformer, or switches to complete the modem design.
The user only needs to provide the TTL level, serial
interface and the telephone line connection.

The XE1414C is pin compatible with Xecom's XE3314C
modem. This family of modems permits a simple
upgrade path from 14,400 bps to 33,600 bps for
international embedded modem applications.

Features

Meets telecom requirements for Europe, North

•

America, and Japan: Includes User Transferrable FCC
Part 68 Registration and CTR21 compliance

Small Size: 2.75 inches by 1.38 inches by 0.42 inches;

•

Modem Protocols support data transfer from 300

•

BPS to 14.4 KBPS: V.32bis, V.32, V.22bis, V.22, V.21,
Bell 212A and 103;

• Modem Control and Configuration via AT Commands

Fax Protocols: V.17, 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 57,600 bps.
Non-Volatile Memory included for storing telephone

•

numbers and modem configuration.

• Standard operating temperature range 0C to 70C.

Extended range of -40C to +85C is available.

• Supports Leased Line Applications.

Serial I/O

/DTR

/RTS
/CTS
/DSR

TXD

RXD

/DCD

Auxiliary I/O

RESET

AR

LCS

OH

AMP

L1
L2

Modem

Controller

Block Diagram

ROM

NVRAM

Analog

Front

End

DAA

Tip

Ring

XECOM (1) XE1414C

XE1414C Mechanical Specifications

INCHES METRIC(MM)

PIN MIN MAX MIN MAX

A 2.74 2.760 69.60 70.10
B 1.370 1.390 34.80 35.31
C 0.420 0.430 10.67 10.92
D 1.190 1.210 30.23 30.73
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

Pins = 0.025 inch square pin; All pins tin-plated

A

B

Denotes Pin 1

C

G

G

D

XE1414C PIN CONFIGURATION

NC
AR

RXD

NC
NC
NC
NC
NC

/DTR

LCS

/CTS

NC

TXD

/RTS

NC
/RI

1
2
3

4
5
6
7
8

9
10
11
12
13
14
15
16

F

K

H

40
39
38
37
36
35
34
33

32

31
30
29
28
27

E

VCC
/DSR
/DCD
NC
RESET
NC
NC
NC
NC
NC
OH
NC
L2
L1

J

H

TIP

RING

18

20

22
21

AMP
GND

XECOM (2) XE1414C

XE1414C PIN DESCRIPTIONS

PIN NAME DESCRIPTION

1 NC No Internal Connection
2 AR Auxiliary Data/Voice Relay, Active High Output, TTL/CMOS. The AR signal goes high when ever the mo-

dem is in the on-hook state. It can be connected to an external relay to switch control of the telephone line
between the modem and an auxiliary handset when.

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".

4-8 NC No Internal Connection

9 \DTR Data Terminal Ready, Input, active Low, TTL. The "AT&D" command sets the function of \DTR. The de-

fault, 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 reasserted.

10 LCS Loop Current Sense, input, active High, TTL/CMOS. LCS provides an input to the modem from an ex-

ternal loop current sensor. The Loop Current Sensor may be required for some applications in which the
modem shares a telephone line with a telephone handset.

11 \CTS Clear to Send, Output, active Low, TTL/CMOS. \CTS provides the flow control output from the modem

when hardware flow control is selected. The modem revokes \CTS when the modem's input buffer is

full. The modem reasserts \CTS when the buffer can accept more data without a buffer overflow.
12 NC No Internal Connection
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 XE1414C uses \RTS for hardware flow control. When

\RTS is revoked; hardware flow control is activated, and the modem will not place data on 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 pin 3) from the internal DAA. The XE1414C is not sensitive to

the battery voltage polarity across Tip and Ring.
20 RING Ring connection to the phone line (RJ11 pin 4) from the internal DAA.
21 GND Ground (0 volts)
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.

27-28 L1, L2 L1 and L2 provide the control the performance of the loop current holding circuit. When a jumper is applied

between L1 and L2, the CTR21 current limiting circuit is active and DC loop current is limited to 60

milliamps. When no jumper is provided, a full 100 milliamps of loop current is supported.
29 N/C No Internal Connection
30 OH Off-Hook, Output, active High. OH indicates the modem's hookswitch relay is closed. Hookswitch closure

connects the modem to the telephone line.

31-35 N/C No Internal Connection

36 RESET Hardware reset pin, Input, active High, TTL. A high on Pin 36 initiates a hardware reset. An external reset

is not required or recommended. The Reset pulse must be held a minimum of 100 milliseconds.
37 N/C No Internal Connection

XECOM (3) XE1414C

XE1414C PIN DESCRIPTIONS

PIN NAME DESCRIPTION

38 \DCD Data Carrier Detect, Output Active Low, TTL/CMOS. The &C command sets the function of \DCD. In the

default state \DCD activates when a valid carrier is detected.
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

XE1414C 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

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

1

Extended Operating Temperature (-40° to +85° C) available. Order XE1414C-ITR

1

0 TO 70° C

XE1414C ELECTRICAL SPECIFICATIONS

Parameter M in Typ Max Units Comments

VCC 4.75 5.25 Volts
ICC 140 160 180 ma On Line

4 0 ma Sleep Mode
Ring Voltage Detected 38 150 RMS Type B Ringer
Ring Frequency Detected 15.3 68 Hz T ype B Ringer
Telephone Loop Current 20 100 ma Off-Hook
Data Transmit level -11.0 -10.0 -9.0 dBm
DTMF Transmit Level -2.5 0 dBm Avg over 3 second interval

XECOM (4) XE1414C

XE1414C Typical Connection Diagram

L1

L2

XE1414C

/RXD
/TXD
/DTR

/RTS
/CTS

/DSR

/DCD

/RI

16C550

UART

J1

C1

C2

FB1

FB2

Ring

Tip

AMP
GND

.2 ufd

50K

LM386

.05 ufd

10 ohms

250 ufd

8 ohm,
.5 W
speaker

Recommended Parts

Reference Designation Description Recommended Part Number

FB1, FB2 Ferrite Beads TDK ACB2012L-120-X

C1, C2 Capacitors Panasonic ECKDRS471, 470 pfd, 2600 Volts

J 1 RJ11 Jack Stewart SS6446NF

Notes: 1) RJ11 Pin assignments reflect a 6-pin connector. Tip and Ring are always the center pins of the RJ11

Jack.

2) CTR21 requires the modem to be able to dissapate over two Watts in come applications where the integral
current limiting circuit is activated. The XE1414C requires a heat sink to be added to dissapte this addi­tional power.

XECOM (5) XE1414C

Country Selection

Xecom has designed the XE1414C to the Telephone standards of a wide variety of countries
throughoput the world. Below is a list of the country standards which Xecom has found the XE1414C
to comply . Please contact Xecom if you have questions regarding a country not on this list.

Countries Supported:

COUNTRY AT COMMAND

Austria A T+GCI=0A

Belgium A T+GCI=0F

Denm ark A T+GCI=31

Finland A T+GCI=3C

France AT+GCI=3D

Germ any A T+GCI=42

Greece AT+GCI=46

Holland A T+GCI=7B

Ireland A T+GCI=57

Italy A T+GCI=59

Japan AT+GCI=00

Korea AT+GCI=B5
Norway AT+GCI=82
Portugal AT+GCI=8B

Singapore A T+GCI=B5

Spain A T+GCI=A0

Sweden AT+GCI=A5

Switzerland AT+GCI=A6

T aiwan AT+GCI=B5

United Kingdom A T+GCI=B4

United States AT+GCI=B5

NOTE: Country regulations permit Xecom to offer transferrable registration only in the United
States, FCC Part 68 only . All other required certifications of systems using the XE1414C are the
responsibility of Xecom’s customer. Xecom will assist our customers with any of these
certifications.

XECOM (6) XE1414C

Application Note: XE1414C Leased Line Operation

The XE1414C can support leased line applications. Because newer chipsets do not support automatic leased line
operation, the leased line handshake must be controlled by the local host.

Before attempting to establish the leased line connection, one modem must be defined as the originating modem and
one as the answering modem. The local host issues an A TD to initiate handshaking on the originating modem and AT A
to intiate the handshake on the answering modem. If the leased line connection is broken both local hosts must act to re­initiate the handshake sequence.

No special configuration is required for leased line operation. Any modem configuration for error correction, data
compression, and flow control will work. Decribed below are some configuration options which may be beneficial in
your leased line application.

A T&C1 This command sets the operation of the Data Carrier Detect signal. With the &C1 setting Data Carrier Detect

becomes active whenever the modem detects a valid carrier signal and becomes inactive when that carrier
signal is lost. The local host can monitor Data Carrier Detect to determine whether or not the leased line
connection is intact.

A T+MS This command controls the modem handshaking options. It can be used to limit the modem handshake to a

particular speed or protocol. The +MS command includes four selectable parameters; modulation, automatic
fallback during negotiations, minimum accepted data rate and maximum data rate. Setting the maximum and
minimum data rates to the same value will require the modem to connect at only the desired data rate. The
format and codes for the +MS command are shown below .

AT+MS modulation, auto negotiation, minimum data rate, maximum data rate<ENTER>

Modualtion T ype V21 - V.21(300 BPS)

V22 - V.22 (1200 BPS)
V22B - V.22bis (2400 BPS)
V23 - V.23 (1200 BPS Half Duplex)
V32 - V.32 (9600 BPS)
V32B - V.32bis (14,400 BPS)
B103 - Bell 103 (300 BPS)
B212 - Bell 212 (1200 BPS)

Auto Negotiation 0 - Automode disabled

1 - Automode enabled

Minimum Data Rate 300 - 300 BPS
or 1200 - 1200 BPS
Maximum Data Rate 2400 - 2400 BPS

4800 - 4800 BPS
7200 - 7200 BPS
9600 - 9600 BPS
12000 - 12,000 BPS
14400 - 14,400 BPS

XECOM (7) XE1414C

XE1414C AT COMMANDS

Modes of Operation

The XE1414C uses "A T" commands for modem control
and configuration. The XE1414C 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
establishing a modem link and issues a "CONNECT"
result code. In Data Mode the modem modulates all
signals presented 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 XE1414C 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 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 a
maximum of 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 line any time before it is executed.
The backspace character 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 XE1414C 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.

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 "+++."

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.

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.

XECOM (8) XE1414C

XE1414C AT COMMANDS (continued)

List of Commands

An asterisk indicates the default setting of the command for the
XE1414C.

A - Answer Command - ATA forces the modem to immedi­ately go off-hook and begin transmitting 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

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

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.

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*

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

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 Respond "CONNECT XXXX" where XXXX is

the DTE Rate*
n=1 Report line speed, DTE speed and Link protocol
n=2 Respond "CONNECT XXXX " where XXXX

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*

XECOM (9) XE1414C

XE1414C AT COMMANDS (continued)

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

&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

&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

&Vn - View Configuration Profiles - AT&V permits the user
to check on the modem’s current configuration.

n=0 View current active and user profiles *
n=1 View statistics from last connection

&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 phone number "x" in memory location
"n"

%Cn - Data Compression - This command sets the modems

data compression negotiations.

n=0 No Data Compression
n=1 Enables MNP5 Data Compression
n=2 Enables V.42bis Data Compression
n=3 Enables both MNP5 and V.42bis *

%En - Line Quality Monitor/Auto Retrain - AT%En
determines if the modem will monitor line quality during a
connection and initiate a retrain if quality drops below
acceptable levels.

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

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

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

%L - Read Received Signal Level - AT%L
to read the magnitude of the receive signal in dBm.

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

permits

XECOM (10) XE1414C

the user

XE1414C AT COMMANDS (continued)

\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 received from the host.

Break received from host in data transfer mode.

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 the host during the on-line com­mand mode.

n=0 Purge buffers, immediately transmit break
n=1 Same as n=0
n=2 Immediately send break
n=3 Same as n=2
n=4 Send break in sequence with data
n=5 same as n=4 *

Break received from modem during a non-error cor­rected link

n=0 Purge buffers, Immediately send break to 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*

\Nn - Error Control Selection - AT\Nn determines 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
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

/V<value> - Single Line Connect Messages - This command
allows users to select single line connect messages in the for­mat shown below.
<DTE Speed> <Modulation> <Protocol> <Compression>
<Line Speed> <Voice & Data>

n=0 No single Line Connect Messages
n=1 Issue a complete response in a single line

-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 no MNP Extended

Service during V.42 LAPM answer mode detect.

+GCI=nn - Country Code - The AT+GCI command sets the
country code to be sued by the modem. See the country listing
on Page 6 for the appropriate country code for your application.
The Default country code is B5, United States.

+MS - Select Modulation - AT+MS sets the modulation and
data rates to be supported by the modem. The format for the
+MS command is shown below.

AT+MS=a, b, c, d, e, f<CR>
a - modulation type

B103 - Bell 103 (300 BPS)
B212 - Bell 212A (1200 BPS)
V21 - V.21 (300 BPS)
V22 - V.22 (1200 BPS)
V.22B - V.22bis (1200 or 2400 BPS)
V23 - V.23 (1200 Tx / 75 RX or 75 Tx / 1200 Rx)
V32 - V.32 (4800 or 9600 BPS)
V32B - V.32bis (4800 to 14,400 BPS)

b - Automode Detection

0 - Automatic Negotiation Disabled

1 - Automatic Negotiation Enabled
c - Minimum Receive Data Rate (300 to 14400 BPS)
d - Maximum Receive Data Rate (300 to 14400 BPS)
e - Minimum Transmit Data Rate (300 to 14400 BPS)
f - Maximum Transmit Data Rate (300 to 14400 BPS)

Default: AT+MS=V32B, 1, 300, 300, 300, 14400

XECOM (11) XE1414C

XE1414C Modem Registers

S0 Answer on nth Ring: S0 sets the modem to auto-

matically 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 showing the

number of rings detected. If a ring is not detected
within 8 seconds, S1 is reset to zero.
Range: 0 to 255
Units Rings
Default 0

S2 Escape Character: S2 sets the ASCII escape

character. 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 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)

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 2

S9 Reserved:

S10 Carrier Off Disconnect Delay: S10 selects how long

carrier must be lost before the modem disconnects.
Note: If the value of 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: S11 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

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

XECOM (12) XE1414C

XE1414C Modem Registers (continued)

S14 General Bit-Mapped Options: S14 reflects the state

of several "AT" commands.

Bit 0,4,6 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 5 0 = Tone Dialing Selected (T)

1 = Pulse Dialing Selected (P)

Bit 7 0 = Answer

1 = Originate

S16 Test Status: S16 shows the modem test status.

Bit 0 0 = No Local Analog Loopback

1 = Local ALB Active

Bit 1-7 Not Used

S21 General Bit-Mapped Options: S21 reflects the state

of several "AT" commands.
Bit 0-1 Not Used
Bit 2 Always On
Bit 3,4 0 = DTR ignored (&D0)

1 =

Enter command mode on DTR off
2 = Disconnect on DTR off (&D2)
3 = Reset on DTR off (&D3)

Bit 5 0 = DCD always active (&C0)

1 = DCD on with Carrier (&C1)

Bit 6 0 = DSR always active (&C0)

1= DSR on when modem ready (&C1)

Bit 7 Not Used

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

(&D1)

S23 General Bit-Mapped Options: S23 reflects the state

of several "AT" commands.

Bit 0-5 Not used
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 Mode Timer: S24 sets the length of time in

seconds that the modem must be idle befor entering the
low power, sleep mode. When set to 0, Sleep Mode is

disabled.
Range: 0 to 255
Units 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)
101

011
Bit 2, 4-5, 7 Not Used
Bit 6 0 = CCITT Protocols (ATB0)

S28 Pulse Dialing Bit-Mapped Options: S28 stores the

modem's pulse dialing configuration.

Bit 0-2, 5-7 Not Used
Bit 3-4 0 = Make/Break ratio 39%/61%; 10

S29 Hook Flash Timer: S29 determines the length for

time the modem closes its off-hook relay on receipt of
the "!" dial modifier to simulate a switch hook flash.

Range: 0 to 255
Units 10 milliseconds
Default 70

= Error control enabled (AT&Q5)

= Direct Mode (AT&Q6)

1 = Bell Protocols (ATB1)

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)

XECOM (13) XE1414C

XE1414C Modem Registers (continued)

S30 Disconnect on Inactivity Timer: S30 sets the

periond the modem is idle before it disconnects. 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 =

Bit 1 Not Used
Bit 2-3 0 = Report host speed (ATW0)

Bit 4-7 Not Used

S36 LAPM Failure: S36 instructs the modem what to do

if the error control negotiations fail.

Bit 0-2 0 = Modem Disconnects

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

modem's flow control status, AT&K.

Bit 0-2 0 = Flow Control Disabled

Bit 3-7 Not used

No single-line Connect messages

1 =

Use single-line connect messages

1 = Report all parameters (ATW1)
2 =

Report modem speed only (ATW2)

1 = Establish Direct Connection
2 = Reserved
3 = Establish normal Connection
4 = Disconnect if MNP handshake fails
5 = Establish Direct Connection if
MNP handshake fails.
6 = Reserved
7 = Establish Normal Connection if
MNP handshake fails.

1 = Reserved
2 = Reserved
3 =

Hardware Flow Control, RTS/CTS

4 =

In-Band Flow Control XON/XOFF

5 =

Transparent In-Band Flow Control
6 = Reserved
7 = Reserved

(AT\V1)

(AT\V0)

S40 MNP Bit-Mapped Options: S40 shows the status of

the modem's MNP commands, .

Bit 0-1 0 = No LAPM/MNP10 conversion (AT-K0)

1 = Enable LAPM/MNP10 conversion

(AT-K1)

2 = Enable LAPM to MNP10 conversion ex

cept 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 Not Used

S41 General Bit-Mapped Options: S41 stores the condi-

tion 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 (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.

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

XECOM (14) XE1414C

XE1414C Modem Registers (continued)

S86 Call Failure Code: S86 shows why the last "NO CAR-

RIER response was issued.
S86=0 Normal disconnect
S86=3 Call Waiting caused disconnect
S86=4 Loss of Carrier
S86=5 Error Correction negotiation failure
S86=6 No response to feature negotiation
S86=7 The other modem was synchronous
S86=8 No common framing technique
S86=9 No common modem protocol
S86=10 Bad response to feature negotiation
S86=12 Disconnect initiated by remote modem
S86=13 No response after 10 retries
S86=14 Protocol violation
S86=15 DTR deactvated by host
S86=16 Received GSTN cleardown
S86=17 Inactivity timeout
S86=18 Data Rate not supported
S86=19 Long Space Disconnect
S86=20 Key abort disconnect
S86=21 Clear previous disconnect cause
S86=22 No Connection established
S86=23 Disconnect after 3 retrains
S86=24 Call Waiting tone detected
S86=25 Extension pickup detected
S86=26 Remote hang-up detected

S95 Extended Result Codes: S95 permits the user to cus-

tomize the extended result

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

codes.

XE1414C Class 1 Fax Commands

AT+FCLASS? - Service Class Indication

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

AT+FCLASS=? - Service Class Capability

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

AT+FCLASS=n - Set Service Class

AT+FRM<mod> - Receive Fax

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

AT+FRS<time> - Receive Silence

AT+FAE=n - Data/Fax Auto Answer

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

AT+FRTn - Receive Test Data
AT+FTH<mod> - Transmit HDLC Data

AT+FF - Enhanced Flow Control
AT+FRH<mod> - Receive HDLC Data

3 V.21 Channel 2, 300 bps
24 V.27ter, 2400 bps
48 V.27ter, 4800 bps
72 V.29, 7200 bps

AT+FTM<mod> - Transmit Fax

(see AT+FRH for "mod" values)

A T+FTS<time> - Transmit Silence
AT+FTTn - Transmit Test Data

XECOM (15) XE1414C

96 V.29, 9600 bps
97 V.17, 9600 bps
98 V.17 short train, 9600 bps
121 V.17, 12,000 bps
122 V.17 short train, 12,000 bps
145 V.17, 14,400 bps
146 V.17 short train, 14,400 bps

(see AT+FRH for "mod" values)

(see AT+FRH for "mod" values)

XE1414C Modem 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 .23 originate connection
23 CONNECT 1200TX/75RX V.23 answer connection
33 FAX Fax connection
35 DATA Data connection in Fax mode
40 +MRR: 300 300 bps carrier received
44 +MRR: 1200/75 V.23 reverse channel carrier received
45 +MRR: 75/1200 V.23 forward channel carrier received
46 +MRR: 1200 1200 bps carrier received
47 +MRR: 2400 2400 bps carrier received
48 +MRR: 4800 4800 bps carrier received
49 +MRR: 7200 7200 bps carrier received
50 +MRR: 9600 9600 bps carrier received
51 +MRR: 12000 12,000 bps carrier received
52 +MRR: 14400 14,400 bps carrier received

igits Verbose Description

66 +DR: Alt MNP5 data compression
67 +DR: V42B V.42bis data compression
69 +DR: NONE No data compression
70 +ER: NONE No error correction
77 +ER: LAPM LAPM error correction
80 +ER: ALT MNP error correction
81 +ER: ALT CELLULAR MNP10 error correction
84 CONNECT 33600 33,600 bps Connection

91 CONNECT 31200 31,200 bps Connection
134 +MCR: B103 Bell 103 Connection
135 +MCR: B212 Bell 212A Connection
136 +MCR: V21 V.21 Connection
137 +MCR: V22 V.22 Connection
138 +MCR: V22B V.22bis Connection
139 +MCR: V23 V.23 Connection
140 +MCR: V32 V.32 Connection
141 +MCR: V32B V.32bis Connection
+F4 +FCERROR Fax carrier error

XECOM (16) XE1414C

XE1414C FCC Registration

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 XE1414C provides a user transferable
FCC Registration. This permits XE1414C 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:

his product complies with Part 68 of the FCC Rules and

T
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.

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 XE1414C
module.

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.

XECOM (17) XE1414C

Terms of Sale

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 t he
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.

Life Support Policy

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

Life Support Devices or Systems are 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.

Copyright, Xecom © 2002
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 Inco rporate d

374 Turquoise Street, Milpitas, CA 95035

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

XECOM (18) XE1414C