Western Telematic Data/FaxModem User manual

WTI Part No.: 12548
Rev. F
RMM
Rack Mount Data/Fax Modem
User's Guide

5 Sterling ·Irvine ·California 92618-2517
[phone] ·Toll Free: 1-800-854-7226
Fax: [phone] ·http://www.wti.com

1. Introduction
The RMM Rack Mount Data/Fax Modem is designed for applications
that require a single “Industrial Strength” modem that easily installs in
equipment bays. The unit requires only 1 rack space, thus eliminating
the hassle of equipment trays and power bricks required for “Plastic
Box” modems.
The heart of the RMM is the popular and highly reliable U.S.
Robotics® Sportster® 28.8 modem card. The power supply is filtered,
fused and surge protected for operation in harsh environments. The
RMM is available in 115/230 (switchable) and 48 volt DC versions.
Features
·Requires Only One 19 Inch Rack Unit.
·High Speed ITU-T V.34+
·Filtered and Surge Protected Power Supply.
·115/220 Volt AC and 48 Volts DC Versions.
Page 1
Figure 1: Front Panel

2. Unit Description
2.1. Front Panel Indicators
LED Status Meaning
AA
(Auto Answer)
On Answer mode only: Modem is answering a call and
DIP Switch 5 is UP (Enable Auto Answer), or
register S0 is set to 1 (Auto Answer, 1 Ring).
Off No activity, or modem is originating a call.
Flash Incoming call.
CD
(Carrier Detect)
On A valid data carrier signal has been received from a
remote modem, and Dip Switch 6 is UP (Normal
Carrier Detect). Modem is ready to transmit data.
The CD Indicator will remain ON constantly if Dip
Switch 6 is DOWN (Carrier Detect Override).
RD
(Receive Data)
Flash Modem is sending result codes or passing received
data bits.
SD
(Send Data)
Flash Computer is sending data bits.
TR
(Data Terminal
Ready)
On Modem is receiving DTR signal from computer. The
TR indicator will only function when Dip Switch 1 is
UP (Normal DTR). Remains ON constantly if Dip
Switch 1 is DOWN (DTR Override).
CS
(Clear to Send)
On Hardware flow control is enabled (&H1, &H3),
modem is waiting for low CTS signal.
Page 2
RMM User’s Guide

3. Operation
The following commands can be used to display current configuration
status and various help menus:
View Modem Setup: ATI4
Basic Help Menu: AT$
Dial Command Help Menu: ATD$
Configuration Command Help Menu: AT&$
List of S-Registers: ATS$
Reset Modem to Default Profile 0: ATZ3
When the View Modem Setup command (ATI4) is invoked, the
RMM will display a status screen as shown below.
Page 3
B0 E1 F1 M1 Q0 V1 X1 Y0
BAUD=9600 PARITY=N WORDLEN=8
DIAL=PULSE ON HOOK
&A1 &B0 &C1 &D2 &G0 &H0 &I0 &K1
&M4 &N0 &P0 &R1 &S0 &T5 &Y1
S00=001 S01=000 S02=043 S03=013 S04=010 S05=008 S06=002
S07=060 S08=002 S09=006 S10=007 S11=070 S12=050 S13=000
S14=000 S15=000 S16=000 S17=000 S18=000 S19=000 S20=000
S21=010 S22=017 S23=019 S24=000 S25=005 S26=000 S27=000
S28=008 S29=020 S30=000 S31=000 S32=000 S33=000 S34=006
S35=000 S36=014 S37=000 S38=000 S44=015 S51=000
Figure 2: The Status Screen (Defaults Shown)

4. Installation
4.1. 48 Volt DC Power Option
The 48 Volt DC input is not polarity sensitive. Therefore, you can
connect either positive or negative wires from your 48 volt power
source to either input and the internal circuitry will adjust for the proper
polarity.
Input Range: 40 - 60 Volts DC, 200 milliamps maximum.
Page 4
RMM User’s Guide
Figure 3: 48 Volt DC Power Option

4.2. Dip Switch Settings
Switch Factory
Setting Function
1Data Terminal Ready (DTR) Override
lUP Normal DTR operations: Computer must
provide DTR signal for modem to accept
commands. Dropping DTR terminates call.
DOWN DTR Override: Modem ignores DTR
2Verbal/Numeric Result Codes
lUP Verbal (Word) Results
DOWN Numeric Results
3Result Code Display
UP Suppress Result Codes
lDOWN Display Result Codes
4Command Mode Local Echo Suppression
lUP Enable Echo
DOWN Suppress Echo
5Auto Answer Suppression
lUP Auto Answer On: Modem answers on first
ring, or higher if specified in NVRAM
DOWN Auto Answer Off: Disable auto answer
6Carrier Detect (CD) Override
lUP Normal: Modem sends CD signal when
connecting with another modem, drops CD on
disconnect
DOWN Override: CD always ON
7Power-On and ATZ Reset Software Defaults
UP User Defaults: Load Y or Y1 configuration
from user-defined nonvolatile memory
(NVRAM).
lDOWN Factory Defaults; Load &F0 (Generic)
template from read-only memory (ROM).
8AT Command Set Recognition
UP Dumb Mode: Disables command recognition
lDOWN Smart Mode: Enables command recognition
Page 5
Installation

Page 6
RMM User’s Guide

5. Command Summary
·Type commands in either upper or lower case. Do not use a
combination of upper and lower case characters.
·Use the Backspace key to delete errors. Note that the original AT
command is stored in the modem buffer, and cannot be deleted.
·Some commands have numeric options. If these commands are
invoked without a numeric option, the modem will assume option
0 (zero). For example, when the command ATB is invoked, the
modem will assume command ATB0 was intended.
·All commands begin with the AT prefix, and are invoked by
pressing [Enter] (Carriage Return). The only exceptions are the
A/ command (Repeat previous command) and +++ (Exit to on-
line command mode).
·The maximum command length is 40 characters. This does not
include the AT prefix, Carriage Returns, or spaces.
Note:
•All defaults are based on the &F1-Hardware Flow
Control template loaded in NVRAM.
•Defaults are marked with an asterisk (*).
Command Function/Options
$ Displays basic command list (On-line Help Menu).
A Manual Answer: goes off hook in answer mode.
Pressing any key aborts the operation.
A/ Re-executes the last issued command. Used mainly
to redial. Does not require the AT prefix or a
Carriage Return.
Any key Aborts off-hook dial/answer operation and hangs up.
AT Required prefix for all modem commands. Can also
be used to test for the “OK” result code.
Not required for the A/ command or +++ command.
BnU.S./ ITU-T answer sequence
* B0 ITU-T answer sequence
B1 U.S. answer tone
Page 7
Installation

Command Function/Options
DnDials the specified phone number.
Can also include the following command options:
L Re-dials last number dialed
* P Pulse (Rotary) Dial Mode
R Originates call using answer (reverse)
frequencies.
SnDials phone number string stored in NVRAM
at position n(n= 0-3). Phone numbers are
stored with the &Zn=s command.
T Tone Dial Mode
, (Comma) Two Second Pause. Comma
pause duration can be redefined via the
S8 Register.
; (Semicolon) Return to Command mode
after dialing
“ Dials the letters that follow (in an
alphabetic phone number)
! (Exclamation point) Flashes the
switch hook
/ Delays for 125 msec before proceeding
with dial string
W Wait for second dial tone (X3 or higher).
Linked to S6 register
@ Dials, waits for 5 seconds of silence
after detecting ringbacks, and then
continues (X2 or X4).
$ Displays a list of dial commands.
EnSets local echo. See DIP Switch 4 (Section 4.2).
E0 Echo OFF
* E1 Modem displays keyboard commands
FnSets online local echo of transmitted data ON/OFF.
F0 Local echo ON. Modem sends a copy of
data it sends to the remote system to
your screen.
* F1 Local echo OFF. Receiving system may
send a remote echo of data it receives.
HnControls ON/OFF hook.
H0 Hangs up (goes on hook)
H1 Goes off hook
Page 8
RMM User’s Guide

Command Function/Options
InDisplays the following information.
I0 Four-digit product code
I1 Results of ROM checksum
I2 Results of RAM checksum
I3 Product type
I4 Current modem settings
I5 Nonvolatile memory (NVRAM) settings
I6 Link diagnostics
I7 Product configuration
MnOperates speaker.
M0 Speaker always OFF
* M1 Speaker ON until CONNECT
M2 Speaker always ON
M3 Speaker ON after dial, until CONNECT
OnReturns online.
O0 Returns online
O1 Returns online and retrains
P Sets pulse dial (for phone lines that don’t support
touch-tone dialing).
QnDisplays/suppresses result codes. See DIP Switch 3
(Section 4.2).
* Q0 Displays result codes
Q1 Quiet mode; no result codes
Q2 Displays result codes only in Originate
mode. Cannot be stored in NVRAM.
Sr.b=n Sets bit .b of register rto value n(0/OFF or 1/ON).
Sr=n Sets register rto value n. See list of S-register
settings (Section 6).
Sr? Displays contents of S-register r.
S$ Displays a list of the S-Registers (Section 6).
T Sets tone dial.
VnDisplays verbal/numeric result codes. See DIP
Switch 2 (Section 4.2).
V0 Numeric codes
* VI Verbal codes
Page 9
Command Summary

Command Function/Options
XnSets result code displayed. Default is X4.
Xn Setting
Result Codes X0 X1 X2 X3 X4
0/OK •••••
1/CONNECT •••••
2/RING •••••
3/NO CARRIER •••••
4/ERROR •••••
5/CONNECT 1200 ••••
6/NO DIAL TONE ••
7/BUSY ••
8/NO ANSWER* ••
10/CONNECT 2400 ••••
13/CONNECT 9600 ••••
18/CONNECT 4800 ••••
20/CONNECT 7200 ••••
21/CONNECT 12000 ••••
25/CONNECT 14400 ••••
43/CONNECT 16800 ••••
85/CONNECT 19200 ••••
91/CONNECT 21600 ••••
99/CONNECT 24000 ••••
103/CONNECT 26400 ••••
107/CONNECT 28800 ••••
151/CONNECT 31200 ••••
155/CONNECT 33600 ••••
Functions
Adaptive Dialing •••
Wait for 2nd Dial Tone (W) ••
Wait for Answer (@) ••
Fast Dial ••
*Requires @ in dial string; replaces NO CARRIER
YnSelects power-on/reset default configuration.
* Y0 Default is profile 0 setting in NVRAM
Y1 Default is profile 1 setting in NVRAM
Page 10
RMM User’s Guide

Command Function/Options
ZnResets modem based on current DIP Switch settings.
Z0 Resets modem to NVRAM profile
selected by the Y command
Z1 Resets modem to NVRAM profile 0
Z2 Resets modem to NVRAM profile 1
Z3 Resets modem to factory default
profile 0 (&F0)
Z4 Resets modem to factory default
profile 1 (&F1)
Z5 Resets modem to factory default
profile 2 (&F2)
&$ Displays a list of ampersand (&) commands.
&AnEnables/disables additional result code subsets (see Xn).
&A0 ARQ result codes disabled
&A1 ARQ result codes enabled
&A2 V.32 modulation indicator added
* &A3 Protocol indicators added-
LAPM/MNP/NONE (error control) and
V42BIS/MNP5 (data compression)
&BnManages modem's serial port rate.
&B0 Variable, follows connection rate
* &B1 Fixed serial port rate
&B2 Fixed in ARQ mode, variable in
non-ARQ mode
&CnControls Carrier Detect (CD) signal.
See DIP Switch 6 (Section 4.2).
&C0 CD override
* &C1 Normal CD operations
&DnControls Data Terminal Ready (DTR) operations.
See DIP Switch 1 (Section 4.2).
* &D0 DTR override
&D1 DTR toggle causes online
Command mode
&D2 Normal DTR operations
&D3 Resets on receipt of DTR
Page 11
Command Summary

Command Function/Options
&FnLoads a read-only (non-programmable)
factory configuration.
&F0 Generic template
* &F1 Hardware flow control template
&F2 Software flow control template
&GnSets Guard Tone.
* &G0 No guard tone (U.S. and Canada)
&G1 550 Hz guard tone (some European
countries), requires B0 setting.
&G2 1800 Hz guard tone (U.K.), requires
B0 setting.
&HnSets Transmit Data (TD) flow control
&H0 Flow control disabled
* &H1 Hardware flow control, Clear to
Send (CTS)
&H2 Software flow control, XON/XOFF
&H3 Hardware and software control
&InSets Receive Data (RD) software flow control
(see also &Rn).
* &I0 Software flow control disabled
&I1 XON/XOFF signals to your modem and
remote system
&I2 XON/XOFF signals to your modem only
&KnEnables/disables data compression.
&K0 Data compression disabled
* &K1 Auto enable/disable
&K2 Data compression enabled
&K3 MNP5 compression disabled
&MnSets Error Control (ARQ) for connections at 1200 bps
and higher.
&M0 Normal mode, error control disabled
&M1 Reserved
&M2 Reserved
&M3 Reserved
* &M4 Normal/ARQ
&M5 ARQ mode
Page 12
RMM User’s Guide

Command Function/Options
&NnSets connect speed. If connection cannot be established
at this speed, the modem will hang up. Sets ceiling
connect speed if &Unis greater than 0 (See &Un).
* &N0 Variable rate
&N1 300 bps
&N2 1200 bps
&N3 2400 bps
&N4 4800 bps
&N5 7200 bps
&N6 9600 bps
&N7 12,000 bps
&N8 14,400 bps
&N9 16,800 bps
&N10 19,200 bps
&N11 21,600 bps
&N12 24,000 bps
&N13 26,400 bps
&N14 28,800 bps
&N15 31,200 bps
&N16 33,600 bps
&PnSets pulse (rotary) dial make/break ratio.
* &P0 U.S. /Canada ratio, 39% / 61%
&P1 U.K. ratio, 33%/67%
&RnSets Receive Data (RD) hardware flow control,
Request to Send (RTS) (see also &In).
&R0 Reserved
* &R1 Modem ignores RTS
&R2 Received Data to computer only on RTS
&SnControls Data Set Ready (DSR) operations.
* &S0 DSR override; always ON
&S1 Modem controls DSR
Page 13
Command Summary

Command Function/Options
&TnBegins test modes.
&T0 Ends Test in Progress
&T1 Analog Loopback
&T2 Reserved
&T3 Local Digital Loopback
&T4 Enables Remote Digital Loopback
* &T5 Prohibits Remote Digital Loopback
&T6 Initiates Remote Digital Loopback
&T7 Remote Digital with self test and
error detector
&T8 Analog Loopback with self test and
error detector
$UnSets floor connect speed when &Unis greater than 0.
&Nnis the ceiling connect speed (See &Nn).
* &U0 Disabled
&U1 300 bps
&U2 1200 bps
&U3 2400 bps
&U4 4800 bps
&U5 7200 bps
&U6 9600 bps
&U7 12,000 bps
&U8 14,400 bps
&U9 16,800 bps
&U10 19,200 bps
&U11 21,600 bps
&U12 24,000 bps
&U13 26,400 bps
&U14 28,800 bps
&U15 31,200 bps
&U16 33,600 bps
&WnWrites current configuration to NVRAM templates.
&W0 Modifies the NVRAM 0 template (Y0)
&W1 Modifies the NVRAM 1 template (Y1)
&YnSets break handling.
&Y0 Destructive, but doesn't send break
* &Y1 Destructive, expedited
&Y2 Non-destructive, expedited
Page 14
RMM User’s Guide

Command Function/Options
&Zn=s Writes phone number sto NVRAM at position n
(n= 0-3).
&Zn=L Writes last executed dial string to NVRAM at
position n(n= 0-3).
&Zn? Displays the phone number stored at position n
(n= 0-3).
&ZL? Displays the last executed dial string.
+++ Escapes to online-command mode.
Page 15

6. S-Registers
Note: To change a setting, use the ATSr=ncommand,
where ris the register and nis a decimal value from 0-255
(unless otherwise indicated).
Register Default Function
S0 1 Sets the number of rings on which to answer in Auto
Answer Mode. When set to 0, Auto Answer is
disabled. See DIP Switch 5 (Section 4.2).
S1 0 Counts and stores the number of rings from an
incoming call. Register S0 must be greater than 0.
S2 43 Stores the ASCII decimal code for the escape code
character. The default character is +. A value of 128-
255 disables the escape code.
S3 13 Stores the ASCII code for the Carriage Return
character. Valid range is 0-127.
S4 10 Stores the ASCII decimal code for the Line Feed
character. Valid range is 0-127.
S5 8 Stores the ASCII decimal code for the Backspace
character. A value of 128-255 disables the Backspace
key's delete function.
S6 2 Sets the number of seconds the modem will wait
before dialing. If Xnis set to X2 or X4, S6
determines the timeout length when no dial tone is
detected.
S7 60 Sets the number of seconds the modem will wait for a
carrier. Often used to select a longer duration when
the modem is originating an international connection.
S8 2 Sets the duration (in seconds) for the Dial command
pause option (,).
S9 6 Determines the length of time (in tenths of a second)
the remote modem’s carrier signal must continue in
order to be recognized by the RMM.
S10 7 Sets the length of time (in tenths of a second) the
modem will wait after loss of carrier before hanging
up. Allows the modem to distinguish between a line
hit (or other momentary break) from a true disconnect
(hang up) by the remote modem.
Page 16
RMM User’s Guide

Register Default Function
S10
(continued)
Although it is not recommended to connect to a line
with call waiting, the S10 register can be adjusted
upward to prevent the modem from misinterpreting
the second call signal as a remote disconnect. If call
waiting is a problem, it is preferable to contact your
phone company to determine the command to
temporarily disable call waiting (typically *70W).
For example: ATDT *70W phone number.
Note: If S10 = 255, the modem will not hang up
when the carrier is lost. Dropping DTR hangs up the
modem.
S11 70 Sets the duration and spacing (in milliseconds) for
tone dialing.
S12 50 Sets the duration (in fiftieths of a second) of the guard
time for the escape code sequence (+++).
S13 0 Bit-mapped register. Select the bit(s) you want on
and set S13 to the total of the values in the Value
Column. For example, ATS13=17 enables bit 0
(value is 1) and bit 4 (value is 16).
Bit Value Result
0 1 Reset when DTR drops.
1 2 Reset non-MNP transmit buffer
from 1.5K to 128 bytes.*
2 4 Set backspace key to delete.
3 8 On DTR signal, autodial the
number stored in NVRAM at
position 0.
4 16 At Power On/Reset, autodial the
number stored in NVRAM at
position 0.
5 32 Reserved
6 64 Reserved
7 128 Disconnect on escape code.
* The 1.5K-byte non-ARQ buffer allows data transfer with Xmodem and Ymodem
type file transfer protocols without using flow control.
The 128 Byte option allows remote users with slower modems to prevent
transmitted data from scrolling off screen. When a remote user sends an XOFF
(Ctrl-S) to your computer and transmission stops, data in transit from your modem's
buffer does not exceed the size of the remote user's screen. This is also helpful
when a remote modem/printer application is losing characters.
Page 17
S-Registers

Register Default Function
S14 0 Reserved
S15 0 Bit-mapped register setup. To set the register, see
instructions for S13.
Bit Value Result
0 1 Disable ARQ/MNP for V.22.
1 2 Disable ARQ/MNP for .22bis.
2 4 Disable ARQ/MNP V.32 / V.32bis
/ V.32terbo.
3 8 Disable MNP handshake.
4 16 Disable MNP level 4.
5 32 Disable MNP level 3.
6 64 MNP incompatibility
7 128 Disable V.42 operation.
S16 0 Bit-mapped register setup. To set the register, see
instructions for S13.
Bit Value Result
0 — Reserved.
1 2 Touch tone dialing test.
2-7 — Reserved.
S17 0 Reserved.
S18 0 Test timer for &Tnloopback testing. Sets the length
of time (in seconds) the modem will wait before
automatically timing out and terminating the test.
When set to 0, the timer is disabled.
Valid range is1-255
S19 0 Sets the duration (in minutes) for the Inactivity Timer.
The timer activates when there is no data activity on
the phone line. At time out, the modem hangs up.
S19 = 0 disables the timer.
S20 0 Reserved.
S21 10 Sets the length (in 10 millisecond units) of Breaks
sent from the modem to the computer. Applies to
MNP or V.42 mode only.
S22 17 Stores the ASCII decimal code for the XON
character.
S23 19 Stores the ASCII decimal code for the XOFF
character.
S24 0 Reserved.
Page 18
RMM User’s Guide