Western Telematic Network Card Data FaxModem User Manual

WTI Part No.: 12548  
Rev. F  
RMM  
RackMountData/FaxModem  
User's Guide  
 
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.  
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.  
·
Page 1  
 
RMM User’s Guide  
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  
Flash  
On  
No activity, or modem is originating a call.  
Incoming call.  
CD  
(Carrier Detect)  
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  
Flash  
On  
Modem is sending result codes or passing received  
data bits.  
SD  
(Send Data)  
Computer is sending data bits.  
TR  
(Data Terminal  
Ready)  
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  
 
3. Operation  
The following commands can be used to display current configuration  
status and various help menus:  
View Modem Setup:  
ATI4  
AT$  
Basic Help Menu:  
Dial Command Help Menu:  
Configuration Command Help Menu:  
List of S-Registers:  
ATD$  
AT&$  
ATS$  
ATZ3  
Reset Modem to Default Profile 0:  
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=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)  
Page 3  
 
RMM User’s Guide  
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.  
Figure 3: 48 Volt DC Power Option  
Page 4  
 
Installation  
4.2. Dip Switch Settings  
Factory  
Setting  
Switch  
Function  
1
Data Terminal Ready (DTR) Override  
UP  
Normal DTR operations: Computer must  
provide DTR signal for modem to accept  
commands. Dropping DTR terminates call.  
l
DOWN DTR Override: Modem ignores DTR  
2
3
4
5
Verbal/Numeric Result Codes  
l
UP  
Verbal (Word) Results  
DOWN Numeric Results  
Result Code Display  
UP  
Suppress Result Codes  
l
l
DOWN Display Result Codes  
Command Mode Local Echo Suppression  
UP  
Enable Echo  
DOWN Suppress Echo  
Auto Answer Suppression  
l
l
UP  
Auto Answer On: Modem answers on first  
ring, or higher if specified in NVRAM  
DOWN Auto Answer Off: Disable auto answer  
6
7
Carrier Detect (CD) Override  
UP  
Normal: Modem sends CD signal when  
connecting with another modem, drops CD on  
disconnect  
DOWN Override: CD always ON  
Power-On and ATZ Reset Software Defaults  
UP  
User Defaults: Load Y or Y1 configuration  
from user-defined nonvolatile memory  
(NVRAM).  
l
l
DOWN Factory Defaults; Load &F0 (Generic)  
template from read-only memory (ROM).  
8
AT Command Set Recognition  
UP  
Dumb Mode: Disables command recognition  
DOWN Smart Mode: Enables command recognition  
Page 5  
 
RMM User’s Guide  
Page 6  
 
Installation  
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  
AT  
Aborts off-hook dial/answer operation and hangs up.  
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.  
Bn  
U.S./ ITU-T answer sequence  
* B0  
B1  
ITU-T answer sequence  
U.S. answer tone  
Page 7  
 
RMM User’s Guide  
Command Function/Options  
Dn  
Dials the specified phone number.  
Can also include the following command options:  
L
* P  
R
Re-dials last number dialed  
Pulse (Rotary) Dial Mode  
Originates call using answer (reverse)  
frequencies.  
Sn  
Dials phone number string stored in NVRAM  
at position n (n = 0-3). Phone numbers are  
stored with the &Zn=s command.  
Tone Dial Mode  
(Comma) Two Second Pause. Comma  
pause duration can be redefined via the  
S8 Register.  
T
,
;
(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.  
En  
Fn  
Sets local echo. See DIP Switch 4 (Section 4.2).  
E0  
* E1  
Echo OFF  
Modem displays keyboard commands  
Sets 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.  
Hn  
Controls ON/OFF hook.  
H0  
H1  
Hangs up (goes on hook)  
Goes off hook  
Page 8  
 
Command Summary  
Command Function/Options  
In  
Displays the following information.  
I0  
I1  
I2  
I3  
I4  
I5  
I6  
I7  
Four-digit product code  
Results of ROM checksum  
Results of RAM checksum  
Product type  
Current modem settings  
Nonvolatile memory (NVRAM) settings  
Link diagnostics  
Product configuration  
Mn  
On  
Operates speaker.  
M0  
* M1  
M2  
Speaker always OFF  
Speaker ON until CONNECT  
Speaker always ON  
Speaker ON after dial, until CONNECT  
M3  
Returns online.  
O0  
O1  
Returns online  
Returns online and retrains  
P
Sets pulse dial (for phone lines that don’t support  
touch-tone dialing).  
Qn  
Displays/suppresses result codes. See DIP Switch 3  
(Section 4.2).  
* Q0  
Q1  
Q2  
Displays result codes  
Quiet mode; no result codes  
Displays result codes only in Originate  
mode. Cannot be stored in NVRAM.  
Sr.b=n  
Sr=n  
Sets bit .b of register r to value n (0/OFF or 1/ON).  
Sets register r to value n. See list of S-register  
settings (Section 6).  
Sr?  
S$  
T
Displays contents of S-register r.  
Displays a list of the S-Registers (Section 6).  
Sets tone dial.  
Vn  
Displays verbal/numeric result codes. See DIP  
Switch 2 (Section 4.2).  
V0  
* VI  
Numeric codes  
Verbal codes  
Page 9  
 
RMM User’s Guide  
Command Function/Options  
Xn  
Sets result code displayed. Default is X4.  
Xn Setting  
X0 X1 X2 X3 X4  
Result Codes  
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  
Yn  
Selects power-on/reset default configuration.  
* Y0  
Y1  
Default is profile 0 setting in NVRAM  
Default is profile 1 setting in NVRAM  
Page 10  
 
Command Summary  
Command Function/Options  
Zn  
Resets modem based on current DIP Switch settings.  
Z0  
Resets modem to NVRAM profile  
selected by the Y command  
Resets modem to NVRAM profile 0  
Resets modem to NVRAM profile 1  
Resets modem to factory default  
profile 0 (&F0)  
Z1  
Z2  
Z3  
Z4  
Z5  
Resets modem to factory default  
profile 1 (&F1)  
Resets modem to factory default  
profile 2 (&F2)  
&$  
Displays a list of ampersand (&) commands.  
&An  
Enables/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)  
&Bn  
Manages 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  
&Cn  
&Dn  
Controls Carrier Detect (CD) signal.  
See DIP Switch 6 (Section 4.2).  
&C0 CD override  
* &C1 Normal CD operations  
Controls 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  
 
RMM User’s Guide  
Command Function/Options  
&Fn  
Loads a read-only (non-programmable)  
factory configuration.  
&F0  
* &F1  
&F2  
Generic template  
Hardware flow control template  
Software flow control template  
&Gn  
Sets 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.  
&Hn  
&In  
Sets 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  
Sets Receive Data (RD) software flow control  
(see also &Rn).  
* &I0  
&I1  
Software flow control disabled  
XON/XOFF signals to your modem and  
remote system  
&I2  
XON/XOFF signals to your modem only  
&Kn  
&Mn  
Enables/disables data compression.  
&K0 Data compression disabled  
* &K1 Auto enable/disable  
&K2 Data compression enabled  
&K3 MNP5 compression disabled  
Sets 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  
 
Command Summary  
Command Function/Options  
&Nn  
Sets connect speed. If connection cannot be established  
at this speed, the modem will hang up. Sets ceiling  
connect speed if &Un is 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  
&Pn  
&Rn  
Sets pulse (rotary) dial make/break ratio.  
* &P0  
&P1  
U.S. /Canada ratio, 39% / 61%  
U.K. ratio, 33 % / 67%  
Sets 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  
&Sn  
Controls Data Set Ready (DSR) operations.  
* &S0  
&S1  
DSR override; always ON  
Modem controls DSR  
Page 13  
 
RMM User’s Guide  
Command Function/Options  
&Tn  
Begins test modes.  
&T0  
&T1  
&T2  
&T3  
Ends Test in Progress  
Analog Loopback  
Reserved  
Local Digital Loopback  
Enables Remote Digital Loopback  
Prohibits Remote Digital Loopback  
Initiates Remote Digital Loopback  
Remote Digital with self test and  
error detector  
&T4  
* &T5  
&T6  
&T7  
&T8  
Analog Loopback with self test and  
error detector  
$Un  
Sets floor connect speed when &Un is greater than 0.  
&Nn is 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  
&Wn  
&Yn  
Writes current configuration to NVRAM templates.  
&W0 Modifies the NVRAM 0 template (Y0)  
&W1 Modifies the NVRAM 1 template (Y1)  
Sets break handling.  
&Y0 Destructive, but doesn't send break  
* &Y1 Destructive, expedited  
&Y2 Non-destructive, expedited  
Page 14  
 
Command Function/Options  
&Zn=s  
&Zn=L  
&Zn?  
Writes phone number s to NVRAM at position n  
(n = 0-3).  
Writes last executed dial string to NVRAM at  
position n (n = 0-3).  
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  
 
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).  
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  
S2  
0
Counts and stores the number of rings from an  
incoming call. Register S0 must be greater than 0.  
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  
S4  
S5  
13  
10  
8
Stores the ASCII code for the Carriage Return  
character. Valid range is 0-127.  
Stores the ASCII decimal code for the Line Feed  
character. Valid range is 0-127.  
Stores the ASCII decimal code for the Backspace  
character. A value of 128-255 disables the Backspace  
key's delete function.  
S6  
S7  
2
Sets 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.  
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  
S9  
2
6
Sets the duration (in seconds) for the Dial command  
pause option (,).  
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  
 
S-Registers  
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  
S12  
S13  
70  
50  
0
Sets the duration and spacing (in milliseconds) for  
tone dialing.  
Sets the duration (in fiftieths of a second) of the guard  
time for the escape code sequence (+++).  
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  
0
1
Value  
Result  
1
2
Reset when DTR drops.  
Reset non-MNP transmit buffer  
from 1.5K to 128 bytes.*  
Set backspace key to delete.  
On DTR signal, autodial the  
number stored in NVRAM at  
position 0.  
2
3
4
8
4
16  
At Power On/Reset, autodial the  
number stored in NVRAM at  
position 0.  
5
6
7
32  
64  
128  
Reserved  
Reserved  
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  
 
RMM User’s Guide  
Register  
Default  
Function  
S14  
S15  
0
0
Reserved  
Bit-mapped register setup. To set the register, see  
instructions for S13.  
Bit  
0
1
Value  
Result  
1
2
4
Disable ARQ/MNP for V.22.  
Disable ARQ/MNP for .22bis.  
Disable ARQ/MNP V.32 / V.32bis  
/ V.32terbo.  
2
3
4
5
6
7
8
Disable MNP handshake.  
Disable MNP level 4.  
Disable MNP level 3.  
MNP incompatibility  
Disable V.42 operation.  
16  
32  
64  
128  
S16  
0
Bit-mapped register setup. To set the register, see  
instructions for S13.  
Bit  
0
Value  
Result  
Reserved.  
1
2-7  
2
Touch tone dialing test.  
Reserved.  
S17  
S18  
0
0
Reserved.  
Test 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 is 1 - 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  
S21  
0
Reserved.  
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  
S23  
S24  
17  
19  
0
Stores the ASCII decimal code for the XON  
character.  
Stores the ASCII decimal code for the XOFF  
character.  
Reserved.  
Page 18  
 
S-Registers  
Register  
Default  
Function  
S25  
5
Sets 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.  
Reserved.  
S26  
S27  
0
0
Bit-mapped register setup. To set the register see the  
instructions for S13.  
Bit  
0
Value  
1
Result  
Enables 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)  
Enables un-encoded (non-trellis  
coded) modulation in V.32 mode.  
Disables V.32 modulation.  
Disables 2100 Hz answer tone to  
allow two V.42 modems to  
connect more quickly.  
1
2
2
3
4
8
4
5
6
7
16  
32  
64  
128  
Enables V.23 fallback mode.  
Disables V.32bis mode.  
Reserved.  
Software 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.  
S28  
0
Eliminates the V.32 answer tones for a faster  
connection.  
8
255  
Default item, all times are in tenths of a second.  
Disables all connections except V.32 at 9600 bps.  
Page 19  
 
RMM User’s Guide  
Register  
Default  
Function  
S29  
20  
Sets the duration (in tenths of a second) of the V.21  
answer mode fallback timer.  
S30  
S31  
S32  
0
128  
2
Reserved.  
Reserved.  
Bit mapped register setup for 28.8 modems only. To  
set the register, see the instructions for S13.  
Bit  
0
1
3
4
5-7  
Value  
1
2
8
16  
Result  
V.8 Call Indicate enabled.  
Enables V.8 mode.  
Disable V.34 modulation  
Disable 33.6 Kbps support.  
32-128 Reserved  
S33  
0
Bit mapped register setup for 28.8 modems only. To  
set the register, see the instructions for S13.  
Bit  
0
1
2
3
4
5
6
7
Value  
1
2
4
8
16  
32  
64  
128  
Result  
Disable 2400 symbol rate  
Disable 2743 symbol rate  
Disable 2800 symbol rate  
Disable 3000 symbol rate  
Disable 3200 symbol rate  
Disable 3429 rate  
Reserved  
Disable shaping.  
S34  
0
Bit mapped register for 28.8 modems only. To set  
registers, see instructions for S13.  
Bit  
0
1
2
3
4
5
6
7
Value  
1
2
4
8
16  
32  
64  
128  
Result  
Disable 8S-2D trellis encoding.  
Disable 16S-4D trellis encoding.  
Disable 32S-2D trellis encoding.  
Disable 64S-4D trellis encoding.  
Disable nonlinear coding.  
Disable TX level deviation.  
Disable Pre-emphasis.  
Disable Pre-coding.  
S35-S37  
Reserved.  
Page 20  
 
S-Registers  
Register  
Default  
Function  
S38  
0
Sets 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.  
Page 21  
 
RMM User’s Guide  
7. Specifications  
Compatibility:  
ITU-T V.34+: 33.6 Kbps  
ITU-T V.34: 28.8 Kbps  
ITU-T V.32 bis: 14.4 Kbps  
ITU-T V.32: 9600 bps  
ITU-T V.22 bis: 2400 bps  
Bell: 212 / V.22, 103 / V.21  
Supports: V.42 / MNP 2-4 Error Control  
V.42 bis / MNP 5 Data Compression.  
Command Set: Industry Standard “AT” Commands  
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" (H x W x D)  
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  
Page 23  
 
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.  
© Copyright Western Telematic, Inc. 1998  
Printed in the United States of America  
September 1998  
Part Number: 12548 Revision: F  
Page 24  
 

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