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.
Figure 1: Front Panel
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.
·
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RMM User’s Guide
2.Unit Description
2.1.Front Panel Indicators
LEDStatusMeaning
AA
(Auto Answer)
CD
(Carrier Detect)
RD
(Receive Data)
SD
(Send Data)
TR
(Data Terminal
Ready)
CS
(Clear to Send)
OnAnswer 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).
OffNo activity, or modem is originating a call.
FlashIncoming call.
OnA 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).
FlashModem is sending result codes or passing received
data bits.
FlashComputer is sending data bits.
OnModem 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).
OnHardware flow control is enabled (&H1, &H3),
modem is waiting for low CTS signal.
Page 2
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.
B0 E1 F1 M1 Q0 V1 X1 Y0
BAUD=9600PARITY=N WORDLEN=8
DIAL=PULSE ON HOOK
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.
&WnWrites current configuration to NVRAM templates.
&W0Modifies the NVRAM 0 template (Y0)
&W1Modifies the NVRAM 1 template (Y1)
&YnSets break handling.
&Y0Destructive, but doesn't send break
* &Y1Destructive, expedited
&Y2Non-destructive, expedited
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CommandFunction/Options
&Zn=sWrites phone number s to NVRAM at position n
(n = 0-3).
&Zn=LWrites 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.
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RMM User’s Guide
6.S-Registers
Note: To change a setting, use the ATSr=n command,
where r is the register and n is a decimal value from 0-255
(unless otherwise indicated).
RegisterDefaultFunction
S01Sets 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).
S10Counts and stores the number of rings from an
incoming call. Register S0 must be greater than 0.
S243Stores the ASCII decimal code for the escape code
character. The default character is +. A value of 128255 disables the escape code.
S313Stores the ASCII code for the Carriage Return
character. Valid range is 0-127.
S410Stores the ASCII decimal code for the Line Feed
character. Valid range is 0-127.
S58Stores the ASCII decimal code for the Backspace
character. A value of 128-255 disables the Backspace
key's delete function.
S62Sets the number of seconds the modem will wait
before dialing. If Xn is set to X2 or X4, S6
determines the timeout length when no dial tone is
detected.
S760Sets 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.
S82Sets the duration (in seconds) for the Dial command
pause option (,).
S96Determines 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.
S107Sets 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
S-Registers
RegisterDefaultFunction
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.
S1170Sets the duration and spacing (in milliseconds) for
tone dialing.
S1250Sets the duration (in fiftieths of a second) of the guard
time for the escape code sequence (+++).
S130Bit-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).
BitValueResult
01Reset when DTR drops.
12Reset non-MNP transmit buffer
from 1.5K to 128 bytes.*
24Set backspace key to delete.
38On DTR signal, autodial the
number stored in NVRAM at
position 0.
416At Power On/Reset, autodial the
number stored in NVRAM at
position 0.
532Reserved
664Reserved
7128Disconnect 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.
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RMM User’s Guide
RegisterDefaultFunction
S140Reserved
S150Bit-mapped register setup. To set the register, see
instructions for S13.
ValueResult
Bit
01Disable ARQ/MNP for V.22.
12Disable ARQ/MNP for .22bis.
24Disable ARQ/MNP V.32 / V.32bis
S160Bit-mapped register setup. To set the register, see
instructions for S13.
ValueResult
Bit
0—Reserved.
12Touch tone dialing test.
2-7—Reserved.
S170Reserved.
S180Test timer for &Tn loopback 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
S190Sets 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.
S200Reserved.
S2110Sets the length (in 10 millisecond units) of Breaks
sent from the modem to the computer. Applies to
MNP or V.42 mode only.
S2217Stores the ASCII decimal code for the XON
character.
S2319Stores the ASCII decimal code for the XOFF
character.
S240Reserved.
Page 18
S-Registers
RegisterDefaultFunction
S255Sets the duration (in hundredths of a second) that
DTR must be dropped in order to be interpreted as a
DTR loss. Allows the modem to differentiate
between a random glitch and a true DTR loss.
In most cases, the default value can be used. The S25
register is useful for setting compatibility with older
systems running under older operating software.
S260Reserved.
S270Bit-mapped register setup. To set the register see the
instructions for S13.
ValueResult
Bit
01Enables ITU-T V.21 modulation at
300 bps for overseas calls; in V.21
mode, the modem answers both
overseas and domestic (U.S. And
Canada) calls, but only originates
V.21 calls. (Default Bell 103)
12Enables un-encoded (non-trellis
coded) modulation in V.32 mode.
24Disables V.32 modulation.
38Disables 2100 Hz answer tone to
allow two V.42 modems to
connect more quickly.
416Enables V.23 fallback mode.
532Disables V.32bis mode.
664Reserved.
7128Software compatibility code. This
setting disables the codes and
displays the 9600 code instead.
The actual rate of the call can be
viewed on the ATI6 screen. Used
for unusual software
incompatibilities. Some software
may not accept 7200, 12000 and
14400 bps or greater result codes.
S280Eliminates the V.32 answer tones for a faster
connection.
8Default item, all times are in tenths of a second.
255Disables all connections except V.32 at 9600 bps.
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RMM User’s Guide
RegisterDefaultFunction
S2920Sets the duration (in tenths of a second) of the V.21
answer mode fallback timer.
S300Reserved.
S31128Reserved.
S322Bit mapped register setup for 28.8 modems only. To
S380Sets an optional delay (in seconds) before a forced
hang-up and clearing of the Transmit buffer when
DTR drops during an ARQ call. This allows time for
a remote modem to acknowledge receipt of all
transmitted data before it is disconnected.
When set at the default (0), the modem immediately
hangs up when DTR drops.
This option applies only to connections terminated by
dropping DTR. If the modem receives the ATH
command, it ignores S38 and immediately hangs up.
Status/Help: Status display shows current settings and stored
numbers. A Help display summarizes the command set and
S-Register functions.
FCC Reg. No.: CJEUSA-24375-M5-E
Ringer Equivalence: 0.9 B
Compliance: FCC Part 68 / Part 15 Class B
Temperature: 0
° to 50° C (operating)
Power:
AC Model: 115/230 VAC, 50/60 Hz, 10 Watts (switchable)
DC Model: 40 - 60 VDC, 10 Watts Maximum
Size: 1.75" x 19.00" x 4.5" (HxWxD)
Weight: 4 pounds shipping weight
Page 22
8.Customer Service
Customer Service hours are from 8:00 AM to 5:00 PM, PST, Monday
through Friday. When calling, please be prepared to give the name and
make of the unit, its serial number and a description of its symptoms. If
the unit should need to be returned for factory repair it must be
accompanied by a Return Authorization number from Customer
Service.
WTI Customer Service
5 Sterling
Irvine, California 92618
949-586-9950
Toll Free: 1-800-854-7226
Fax: 949-583-9514
http://www.wti.com
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RMM User’s Guide
Trademark and Copyright Information
WTI and Western Telematic are trademarks of Western Telematic, Inc.
All other product names mentioned in this publication are trademarks
or registered trademarks of their respective companies.
Information and descriptions contained herein are the property of
Western Telematic, Inc. Such information and descriptions may not be
copied disseminated or distributed without the express written consent
of Western Telematic, Inc.