s
9600 bps PSTN Modem
Used with:
ControlWave Corrector
ControlWave ExpressPAC
ControlWave GFC
ControlWave GFC Plus
Instruction Manual
Doc Number D301734X012
December 2013
Remote Automa ti on Solution
www.EmersonProcess.com/Remote
Be sure that these instructions are carefully read and understood before any operation is
attempted. Improper use of this device in some applications may result in damage or injury. The
user is urged to keep this book filed in a convenient location for future reference.
These instructions may not cover all details or variations in equipment or cover every possible
situation to be met in connection with installation, operation or maintenance. Should problems arise
that are not covered sufficiently in the text, the purchaser is advised to contact Emerson Process
Management, Remote Automation Solutions for further information.
IMPORTANT! READ INSTRUCTIONS BEFORE STARTING!
EQUIPMENT APPLICATION WARNING
The customer should note that a failure of this instrument or system, for whatever reason, may
leave an operating process without protection. Depending upon the application, this could result in
possible damage to property or injury to persons. It is suggested that the purchaser review the
need for additional backup equipment or provide alternate means of protection such as alarm
devices, output limiting, fail-safe valves, relief valves, emergency shutoffs, emergency switches,
etc. If additional information is required, the purchaser is advised to contact Remote Automation
Solutions.
RETURNED EQUIPMENT WARNING
When returning any equipment to Remote Automation Solutions for repairs or evaluation,
please note the following: The party sending such materials is responsible to ensure that the
materials returned to Remote Automation Solutions are clean to safe levels, as such levels are
defined and/or determined by applicable federal, state and/or local law regulations or codes. Such
party agrees to indemnify Remote Automation Solutions and save Remote Automation Solutions
harmless from any liability or damage which Remote Automation Solutions may incur or suffer due
to such party's failure to so act.
ELECTRICAL GROUNDING
Metal enclosures and exposed metal parts of electrical instruments must be gr ounded in
accordance with OSHA rules and regulations pertaining to "Design Safety Standards for Electrical
Systems," 29 CFR, Part 1910, Subpart S, dated: April 16, 1981 (OSHA rulings are in agreement
with the National Electrical Code).
The grounding requirement is also applicable to mechanical or pneumatic instruments that
include electrically operated devices such as lights, switches, relays, alarms, or chart drives.
EQUIPMENT DAMAGE FROM ELECTROSTATIC DISCHARGE VOLTAGE
This product contains sensitive electronic components that can be damaged by exposure to an
electrostatic discharge (ESD) voltage. Depending on the magnitude and duration of the ESD, this
can result in erratic operation or complete failure of the equipment. Read supplemental document
S14006 for proper care and handling of ESD-sensitive components.
9600 bps PSTN Modem Instruction Manual
Contents
Chapter 1 – Introduction 1-1
1.1 General Description .................................................................................................................. 1-1
1.2 Modem Component Identification ............................................................................................. 1-3
Chapter 2 – PC Configurable Options 2-1
2.1.1 14.4 Kbps Operation ..................................................................................................... 2-2
Chapter 3 – Modem Installation and Setup Procedures 3-1
3.1 Installing a 9600 bps Modem into the ControlWave unit .......................................................... 3-1
3.2 PSTN Hookup ......................................................................................................................... 3-10
3.2.1 If Telephone Equipment Problems Arise .................................................................... 3-11
Chapter 4 – Modem Diagnostics 4-1
4.1 Escape Code Sequence ........................................................................................................... 4-1
4.2 Loopback and Line Signal Tests ............................................................................................... 4-1
4.2.1 Line Signal Level Command (%L) ................................................................................ 4-1
4.2.2 Line Signal Quality Command (%Q) ............................................................................. 4-2
4.2.3 Connection Failure Reason Code Register (S86) ........................................................ 4-2
4.2.4 Test and Diagnostic Command (&Tn) ........................................................................... 4-5
4.3 Modem LEDs ............................................................................................................................. 4-7
Chapter 5 – Specifications 5-1
5.1 Operating Specifications ........................................................................................................... 5-1
5.2 Environmental Specifications .................................................................................................... 5-1
5.3 FCC & UL Approvals ................................................................................................................. 5-2
5.4 Modem Connectors ................................................................................................................... 5-2
5.4.1 Connector J1 ................................................................................................................. 5-2
5.4.2 Connector TB1 .............................................................................................................. 5-2
5.4.3 Connector J2 ................................................................................................................. 5-2
5.4.4 Connector TB2 .............................................................................................................. 5-3
5.4.5 Connector TB4 .............................................................................................................. 5-3
Glossary G-1
Revised Dec-2013 Contents iii
This page is intentionally left blank
Chapter 1 – Introduction
1.1 General Description
Emerson Remote Automation Solutions’ 9600 bps - PSTN modem
transmits and receives digital data at 9600 bps over "public switched
telephone networks" (PSTN). The modem transfers data synchronously
or asynchronously and supports the modulation schemes listed in Table
1-1.
This modem is used with the following ControlWave devices:
ControlWave GFC
ControlWave GFC Plus
ControlWave Corrector
ControlWave ExpressPAC (EPAC)
Table 1-1 - Configurations, Signaling Rates & Data Rates
9600 bps PSTN Modem Instruction Manual
Carrier Freq.
Configuration Modulation
V.32 bis 9600 TCM 1800 9600 2400 4 1 32
V.32 bis 7200 TCM 1800 7200 2400 4 1 16
V.32 bis 4800 QAM 1800 4800 2400 4 1 4
V.32 9600 QAM 1800 9600 2400 4 1 16
V.32 4800 QAM 1800 4800 2400 4 1 4
V.22 bis 2400 QAM 1200/2400 2400 600 4 1 16
V.22 bis 1200 DPSK 1200/2400 1200 600 4 1 4
V.22 1200 DPSK 1200/2400 1200 600 4 1 4
V.22 600 DPSK 1200/2400 600 600 4 1 4
V.21 300 FSK 1080/1750 300 300 4 1 Bell 212A DPSK 1200/2400 1200 600 4 1 4
Bell 103J FSK
(Hz) 0.01%
2225/1270(M)
2025/1070(S)
Data Rate
(bps)
0.01%
0-300 300 4 1 -
Baud
Symbols/Sec.
Bits Per
Symbol
Data TCM
Constellation
Points
A typical example of where these modems are used in a PSTN is shown
in Figure 1-1. This network contains four ControlWave flow computers
equipped with 9600 bps - PSTN modems operating in a master/slave
configuration. During operation, the master controller dials up and
communicates with each slave (remote) at prescribed intervals to send
and receive data. The interval of dialing is a function of the application
software that is executed by the master device.
Revised Dec-2013 Introduction 1-1
9600 bps PSTN Modem Instruction Manual
The modem's transmitter output, as measured with 600-ohm termination
(typical for telephone lines) is -10 dBm (fixed). This qualifies the
modem for use with any voice grade PSTN hookup in compliance with
FCC loop start requirements.
The 9600 bps - PSTN modem provides the following features:
Operates on 2-wire (loop start) switched networks (PSTN) only.
CCITT compatibility (see Table 1-1.)
Compatible with Bell 212A @ 1200 bps (600 baud) and Bell 103J
@ 0-300 bps.
Autodial/Auto-answer operation.
Smart programming based on the Hayes “AT” command set.
Storage of all parameters in non-volatile memory.
Standby Mode - Consumes minimal power until activated by phone
or DTE.
MNP Class 2-4, MNP 10 & V.42 error correction.
MNP 5 & V.42 bis data compression.
Data access arrangement (DAA) with 1000 Vac Isolation.
Surge withstand of 100A with 10 x 160S waveform.
FCC Part 68 approved.
0.5 Ampere fast blow fuse (F1)
Figure 1-1. Typical 9600 BPS - PSTN Modem Network
1-2 Introduction Revised Dec-2013
1.2 Modem Component Identification
Modem components discussed in this manual are previewed below.
These components include connectors, configuration jumpers, LEDs,
fuse F1 and switch SW1.
Interconnection connectors are listed in Table 1-2. Specific connector
pin number and signal name descriptions are provided in Chapter 5.
9600 bps PSTN Modem Instruction Manual
Figure 1-2. 9600 PSTN Modem Assembly - P/N 400000-01-6
Revised Dec-2013 Introduction 1-3
9600 bps PSTN Modem Instruction Manual
Table 1-2. 9600 bps Modem Connector Identification
ID Purpose # of Pins Notes
J1 Telco interface 6 RJ11 pins 3 & 4 Used
J2
TB1 Telco interface 2-Pin TB TB1-1 = tip, TB1-2 = ring0
TB2 DAA Iso. Gnds. 2-Pin TB
TB4 Input Power 2-Pin TB
RS232 interface &
configuration
9-Pin D-Type
Connector
Standard RS-232 port
TB2-1 or TB2-2
To ControlWave GFC ground lug
6V or 12V (dc) from ControlWave GFC
CPU/system controller board
PSTN RJ11 modem connector (J1) provides the interface to the
PSTN network via a modular phone cord and the telephone
company RJ11 jack.
A 9-pin D-type connector (J2) is used for configuring the modem
and as the RS-232 interface data port.
Terminal block (TB1) (2-pin) provides the interface to the PSTN in
lieu of an RJ11 cable connector.
Terminal block (TB2) (2-pin). TB2-1 is shorted to TB2-2. TB2-1
provides the ground connection between the ControlWave device’s
ground lug and the modem.
Terminal block (TB4) accommodates input power (+6/12Vdc and
ground).
The 9600 bps PSTN modem contains up to three factory-set
configuration jumpers. These are described in Table 3-1.
1-4 Introduction Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
Chapter 2 – PC Configurable Options
The modem ships from the factory pre-configured with stored profile
information.
If you want to view or change any modem parameters in the profile, you
must do this using software. Configuration requires an ASCII terminal
(or a PC equipped with terminal emulator software such as
HyperTerminal or PROCOMM) and the modem's RS-232
configuration/data which is the 9-pin D-type connector (J2).
Notes:
Use a standard RS-232 cable, i.e., pin 1 to pin 1, pin 2 to pin 2, etc.
The RS-232 configuration/data port will not respond to
configuration messages during an active phone connection
The PC/terminal emulator must be set for 9600 bps DTE speed
while configuring the modem. The modem remembers the last DTE
speed at which it communicated with the terminal.
The modem will normally (by default) force stored profile 0 to
become active on power-up.
To view/verify the active and stored profiles follow these steps:
1. With the cable connected and the terminal emulation software
running, type AT&V, then press ENTER. The following data should
appear on screen.
ACTIVE PROFILE:
(Should match the stored profile below. Other "S" registers may be
included)
STORED PROFILE 1:
B1 E0 L1 M1 N0 Q0 T V1 W0 X4 Y0 &C1 &D0 &G0 &J0 &K0
&Q5 &R1 &S0 &T5 &X0 &Y1 (note: &Y1 in Active Profile
ONLY) S00:001 S02:043 S06:002 S07:050 S08:002
S09:006 S10:014 S11:095 S12:050 S18:000 S36:007
S40:104 S41:192 S46:136 S95:000
If you see this profile, you can skip the remaining steps.
2. If the NVRAM is not installed or is not operational as detected by
the NVRAM test, the following message is displayed:
NVRAM FAILED OR NOT INSTALLED.
If different profile data appears, the you must enter the following
3.
command string to re-profile the modem:
AT&F S0=1 &C1 &D0 &K0 %C0 E0\V1 (press ENTER)
AT +A8E=,,,0 (press ENTER)
AT&Y1 &W1 ENTER
Revised Dec-2013 PC Configurable Options 2-1
9600 bps PSTN Modem Instruction Manual
4. Power down the modem and then re-apply power to ensure that
Stored Profile 1 is placed into the Active Profile.
5. If re-profiling was performed repeat step 1 to observe and verify the
correct profile data.
2.1.1 14.4 Kbps Operation
If desired, you can increase network performance somewhat by
allowing a maximum modem line speed of 14.4 Kbps without reprofiling. You can modify the master and any or all slave nodes for this
feature. Follow steps 1 through 3 below to achieve this capability:
1. Using the Flash Configuration utility, modify the speed of the
ControlWave port used by the modem to at least 19.2 Kbps (38.4
Kbps maximum).
Using a PC running terminal emulation software such as
2.
HyperTerminal, PROCOMM, or using an ASCII terminal connected
to the modem’s configuration port, access each modem at the
network speed specified in the flash configuration using the AT&V
ENTER command.
3. If possible, configure the cold start default rate for each slave node,
so that cold-downloads via the PSTN network are possible.
2-2 PC Configurable Options Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
Chapter 3 – Modem Installation and Setup Procedures
Printed circuit board (PCB) components can be damaged by
Caution
electrostatic discharge (ESD) during handling (disassembly,
reassembly, test) Use grounded wrist straps and surface pads when
working near or handling any PCB. Refer to supplement document
S14006 for proper ESD grounding and handling techniques.
The 9600 bps - PSTN modem is intended for use on the public switched
telephone network (PSTN) operating in North America as illustrated in
Figure 1-1.
The auxiliary power output connector on the CPU/system controller
board of the ControlWave device powers the modem. Units shipped
from the factory with a modem installed have the auxiliary power output
set ON in the standard application.
If you want the modem powered continuously, and you have since redownloaded your standard load, -or- you are installing a modem for a
unit which originally shipped without a modem, then you must set the
auxiliary power output to ON. This can be accomplished, for standard
applications, on the Radio Control Configuration page by setting the
Radio Control Mode to Always On (See the ControlWave Flow
Measurement Applications Guide (D5137)).
3.1 Installing a 9600 bps Modem into the ControlWave unit
For a ControlWave GFC (Figure 3-3), ControlWave Corrector (Figure
3-4), or ControlWave Express PAC (Figure 3-5), the 9600 bps PSTN
modem mounts on a modem mounting plate which in turn is installed on
a battery cover/radio mounting plate. See Figure 3-1 and Figure 3-2 to
see the mounting location.
For a ControlWave GFC Plus, the 9600 bps PSTN modem mounts on a
universal radio/mounting plate which in turn mounts to the fabrication
panel. See Figure 3-6 and Figure 3-7 to see the mounting location.
To install the modem into any of these units, follow steps 1 through 14
below.
Shut down or place under manual control any critical processes
Caution
controlled by the ControlWave unit.
1. Disconnect power from the ControlWave unit.
2. Open the unit’s front cover.
3. GFC, Corrector, EPAC: Loosen the four screws that secure the
battery cover/radio mounting plate to the one piece/battery mounting
bracket; then slide the battery cover/radio mounting plate upward
and remove it. Now proceed to step 4.
GFC Plus only: Skip to Step 4 (GFC Plus only)
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9600 bps PSTN Modem Instruction Manual
4. GFC, Corrector, EPAC: Align the modem with the four standoffs on
the modem mounting plate and secure it via four screws. Install the
modem mounting plate (with modem installed) onto the battery
cover/radio mounting plate (using four 4-40 x 1/4 screws). Install
the battery cover/radio mounting plate (with modem installed) onto
the one piece/battery mounting bracket (removed in step 3). Tighten
the screws loosened in step 3.
GFC Plus only: Align the modem with the four standoffs on the
modem mounting plate and secure it via four (4) 4-40 x ¼” pan head
screws. Install the modem mounting plate (with modem installed)
onto the universal radio/modem mounting plate (using four 6-32 x
5/16 SEM screws).
5. Configure the modem’s jumpers (if not already configured) as
follows:
Table 3-1. Configuration Jumpers
ID Purpose Jumper Position Notes
JP1 Modem Sleep
(Power Save)
selection
JP2
JP3 LED enable
RTS to CTS
Loopback
Selection (field
configurable)
selection (field
configurable)
Installed = Enable Sleep
(Power Save Mode)
Removed = Disable Power
Save Mode
JP2-1 to JP2-2 CTS from
modem (factory default)
JP2-2 to JP2-3 CTS
connected to RTS
Installed = Enable LEDs
(factory default)
Removed = Disable LEDs
(low power mode)
With JP1 installed, the modem shuts off power
if there is no activity for 10 seconds. The
modem’s power reconnects if it detects pulses
at the ring indicator pin or if it detects activity at
the DTR pin. Note: The modem requires 2-3
seconds after power restoration before it can
receive AT commands.
6. GFCPlus only: Using two (2) 10-32 x 3/8 pan head screws, install
the universal radio/modem mounting plate (with modem installed)
to the fabrication panel. Now proceed to step 7.
GFC, Corrector, EPAC: Skip to step 7.
7. Connect the modem interface cable to TB3 (COM2) on the
ControlWave’s CPU/system controller board (see Table 3-2).
8. Connect the other end of the modem interface cable to its mating 9-
pin D-type connector (J2) on the modem.
9. Connect the modem power cable to the modem as follows:
Red wire = modem board connector TB4-1
Blk wire = modem board connector TB4-2
3-2 Modem Installation Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
10. Connect the other end of the modem power cable to the CPU/system
controller board’s power connector as follows:
Red wire = to J1-5 = AUX PWR
Blk wire = to J1-6 = GND
11. Circuitry associated with the telephone line interface provides over
voltage and surge protection to Earth ground (via the ControlWave
unit’s ground lug) at modem connector TB2-1.
connector TB2-1 to the ground lug (see ). Use a separate #16 AWG wire
(green) to connect to the local Earth ground (see Supplement Guide
S1400CW - ControlWave Site Considerations for Equipment Installation,
Grounding & Wiring.)
Route the phone cord through the 1/2”(GFC, GFC Corrector, EPAC)
12.
Connect modem
1” (GFCPlus) on conduit fitting on the bottom of the ControlWave
unit. Install the cord far enough to accommodate connection of the
wires to the modem.
13. Connect one end of the modular phone cord to the modem’s
modular RJ-11 connector J1. Connect the other end of the modular
phone cord to the wall jack provided by the phone company (see
Section 3.2). Connections to the modem are J1-3 = PSTN-tip and J14 = PSTN-ring. If the unit is to be hardwired to the phone line, use
connector TB1 as follows: TB1-1 = PSTN-tip, TB1-2 = PSTN-ring.
Install the violet jumper wire between TB3-7 and TB3-8 on the
14.
CPU/system controller board (RTS to CTS loopback).
Revised Dec-2013 Modem Installation 3-3
9600 bps PSTN Modem Instruction Manual
Figure 3-1. Modem Mounting Plate and Battery Cover/Radio Mounting Plate (GFC,
Corrector, EPAC)
Figure 3-2. Modem Installed on Battery Cover/Radio Mounting Plate (GFC, Corrector, EPAC)
3-4 Modem Installation Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
Figure 3-3. 9600 bps - PSTN Modem Installed in ControlWave GFC (Front View)
Revised Dec-2013 Modem Installation 3-5
9600 bps PSTN Modem Instruction Manual
Figure 3-4. 9600 bps - PSTN Modem Installed in ControlWave Corrector (Front View)
3-6 Modem Installation Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
Figure 3-5. 9600 PSTN Modem Installed in ControlWave EPAC (Front View)
Revised Dec-2013 Modem Installation 3-7
9600 bps PSTN Modem Instruction Manual
Figure 3-6. Modem Installation Diagram (GFC Plus) - Modem mounted to Modem Mounting Plate,
Modem Mounting Plate mounted to Universal Radio/Modem Mounting Bracket which in
turn is mounted to the Fabrication Panel
3-8 Modem Installation Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
Figure 3-7. 9600 bps - PSTN Modem Installed in ControlWave GFC Plus (Front View)
Revised Dec-2013 Modem Installation 3-9
9600 bps PSTN Modem Instruction Manual
Table 3-2. Wiring Listing
CW CPU Board Connector & Signal Signal
Direction
TB3-3 (TXD) To Modem J2-3 (TXD) RS-232 Brown
TB3-2 (RXD) From Modem J2-2 (RXD) RS-232 Blue
TB3-4 (DTR) To Modem J2-4 (DTR) RS-232 Yellow
TB3-7 (RTS) To Modem J2-7 (RTS) RS-232 Orange
TB3-8 (CTS) RS-232 *
TB3-1 (DCD) From Modem J2-1 (CD) RS-232 Gray
TB3-5 (GND) J2-5 (GND) Ground Green
TB1-5 (AUXPWROUT) To Modem TB4-1 (EXTVDC) Power Red
TB1-6 (PWRGND) TB4-2 (GND) Pwr Gnd Black
Modem Connector
& Signal
Port Usage Wire Color
* Note: Install a jumper wire between RTS and CTS on the CPU/system
controller board.
3.2 PSTN Hookup
A PSTN using a master and three (3) remote ControlWave flow
computers (each equipped with a 9600 bps - PSTN modem) is shown in
Figure 1-1. You typically make the connection to the PSTN using a
cable that has standard telephone connectors at both ends. Plug one end
of the cable into connector J1 of the modem and plug the other end into
a telephone wall receptacle. In some cases wires associated with a
phone cable (un-terminated at one end - see Figure 3-8) may be plugged
into modem connector TB1 (TB1-1 = PSTN-tip & TB1-2 = PSTN-ring).
The telephone company provides the necessary subscriber loops at its
central system along with the phone numbers for each destination.
Only connect one modem to each drop. If you attempt to make connect
Caution
two or more modems in parallel across a single drop, the impedance
mismatch will adversely affect the signal quality. Modems will not
provide reliable communications under these conditions.
An application consisting of a single master and a single remote
requires only one of the remote connections shown in Figure 1-1.
The 9600 bps - PSTN modem is FCC-approved for use with public
telephone lines. Before placing a modem in operation, check the
following items to ensure that all FCC requirements are met:
Connections to party line service is subject to state tariffs.
Connection to telephone company provided coin service (central
office implemented systems) is prohibited.
The equipment compliance information is summarized as follows:
Complies with Part 68 FCC Rules.
3-10 Modem Installation Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
Contains device with FCC Registration Number: B46USA-30667-FA-E
Ringer Equivalence Number (REN): 6B
Note: The sum of all the RENs on your telephone lines should be less
than five in order to assure proper service from the telephone
company. In some cases, a sum of five may not be usable on a
given line.
Figure 3-8. Wiring for Phone Connector
Any direct connections to PSTN lines must be made through
standard plugs and jacks as specified in the FCC rules. The PSTN
line is connected to the modem via either a cable equipped with an
appropriate phone plug (into modem connector J1) or an open-ended
cable that is hardwired to modem connector TB1. Notify your
telephone company that the jack required for your device is one of
the following:
USOC: FJ45S
USOC: RJ11C
Note: The Jack provided on the Modem (J1) is a 6-Pin TelCo RJ-11.
Connections to the modem are Pin 3 PSTN-tip, and Pin 4 PSTNring. Two position terminal block (TB1) is also provided;
connections to the modem are TB1-1 = PSTN-tip & TB1-2 =
PSTN-ring.
After the telephone company installs the above jack, connect the
modem to your equipment by inserting the appropriate equipment
interface cable (plugs) into the modem jack (or terminal block) and
the wall jack.
3.2.1 If Telephone Equipment Problems Arise
If any of your telephone equipment is not operating properly, you
should immediately remove it from your telephone line, as it may cause
harm to the telephone network. If the telephone company notes a
problem, they may temporarily disconnect service. When practical, they
will notify you in advance of this disconnection. If advance notice is not
feasible, you will be notified as soon as possible. When you are notified,
Revised Dec-2013 Modem Installation 3-11
9600 bps PSTN Modem Instruction Manual
you will be given the opportunity to correct the problem and informed
of your right to file a complaint with the FCC. Contact your telephone
company if you have any questions about your phone line. In the event
that repairs are ever needed on the 9600 bps - PSTN modem, contact
Emerson Remote Automation Solutions for a return authorization (RA)
number.
3-12 Modem Installation Revised Dec-2013
Chapter 4 – Modem Diagnostics
Printed circuit board (PCB) components can be damaged by
Caution
4.1 Escape Code Sequence
electrostatic discharge (ESD) during handling (disassembly,
reassembly, test) Use grounded wrist straps and surface pads when
workingnear or handling any PCB. Refer to supplement document
S14006 for proper ESD grounding and handling techniques.
When the modem establishes a connection and enters on-line data mode,
it is possible to break into the data transmission in order to issue further
commands to the modem in an on-line command mode. This is achieved
by the DTE sending the modem a sequence of three (3) ASCII
characters specified in register S2. The default character is '+'. The
maximum time allowed between receipt of the last character of the three
escape character sequence from the DTE and sending of the OK result
code to the DTE is controlled by register S12.
9600 bps PSTN Modem Instruction Manual
4.2 Loopback and Line Signal Tests
AT&Tn commands form part of the CCITT V.54 protocol and can be
used for diagnostic testing.
Note: &Tn commands can only be used when the modem is configured
for &Q0 <CR> (unbuffered/direct asynchronous mode).
There are four loopback configurations that can be used to aid in
troubleshooting modem/line problems:
Local Analog Loopback (see Figure 4-2)
Local Digital Loopback (see Figure 4-3)
Remote Digital Loopback with Local Self Test (see Figure 4- 4)
Local Analog Loopback with Self Test (see Figure 4-5)
The following tests can be done but communication between the master
and slave units has to be stopped as follows:
1. Connect to the modem using terminal emulation software (such as
HyperTerminal or PROCOMM, or an ASCII terminal at 9600 bps:
2. Type ATDT and the number that you want to dial.
3. Wait for a connect at 9600 bps (or less) then type +++ to put the
modem into the Command Mode.
4. Wait for O.K., then type AT%L%Q.
4.2.1 Line Signal Level Command (%L)
The AT%L provide a means of determining the received signal level.
Revised Dec-2013 Modem Diagnostics 4-1
9600 bps PSTN Modem Instruction Manual
The %L command causes the modem to return a value which indicates
the received signal level at the modem data pump interface. The value is
determined by the loss/gain of the modem Telco interface circuit (bB)
at the tip/ring input to the modem (not at the telephone line connector).
For example, 009 = -9 dBm, 043 = -43 dBm, and so on. Typical values
should be -25dBm to -35dBm for most Telco connections.
Results Code: OK
4.2.2 Line Signal Quality Command (%Q)
The AT%Q command causes the modem to report information about the
line signal quality.
The %Q command causes the modem to report the line signal quality
(DAA Telco Interface dependent) at the modem data pump interface.
The modem returns the higher order byte of the Eye Quality Monitor
(EQM) value. Typical value should be below 10. The lower the number,
the better the performance of the modem. Based on the EQM value,
retrain or fallback/fall forward may be initiated if enabled by %E1 or
%E2.
Example:
AT%Q
015
Results Codes:
OK If connected.
ERROR If not connected, or connected in 300 bps, V.23,
or fax modes (N/A).
4.2.3 Connection Failure Reason Code Register (S86)
S-Register S86 can help you to determine the cause of a connection
failure. When the modem issues a NO CARRIER result code, a value is
written to this register. To read this register, following the connection
failure, issue ATS86?<CR>. The modem will report a Call Failure
Reason Code. The following cause codes are associated with register
S86:
0 Normal disconnect, no error occurred.
4 Loss of carrier.
5 V.42 negotiation failed to detect an error-correction modem at the other
4-2 Modem Diagnostics Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
end.
6 Other error-control modem did not respond to feature negotiation
message sent by this modem.
7 Other modem is synchronous-only; this modem is asynchronous-only.
8 Modems could not find a common framing technique.
9 The modems could not find a common protocol.
10 Feature negotiation message sent by other modem is incorrect.
11 Synchronous information (data of flags) not received from other modem.
12 Normal disconnect initiated by the remote modem.
13 Remote modem doesn't respond with 10 re-transmissions of the same
message.
14 Protocol violation occurred.
15 Compression failure.
Figure 4-1. Typical Modem Configuration
Figure 4-2. Initiate Local Analog Loopback Diagram
Revised Dec-2013 Modem Diagnostics 4-3
9600 bps PSTN Modem Instruction Manual
Figure 4-3. Perform Local Digital Loopback Diagram
Figure 4- 4. Remote Digital Loopback with Local Self Test
4-4 Modem Diagnostics Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
Figure 4-5. Local Analog Loopback with Self Test
4.2.4 Test and Diagnostic Command (&Tn)
The modem performs selected test and diagnostic functions according to
the parameter supplied. A test can be run only when in an asynchronous
operation in non-error correction mode (normal or direct mode). To
terminate a test in progress, enter the escape sequence first, except for
parameters 7 and 8 (see Escape Code Sequence Section 4.1). If S18 is
non-zero, a test terminates automatically after the time specified by S18
and displays the OK message. &Tn commands are formatted and
function as follows:
AT&T0
AT&T1
AT&T2
Terminate Test in
Progress
Initiate Local Analog
Loopback
No Function.
Terminate test In progress and clear register S16. If a V.54 loopback test is
in process (as a result of executing an &Tn command), the &T0 command
will cause the test to be terminated provided that the modem is in command
state, or a V.54 state that accepts commands from the DTE.
Initiate local analog loopback, V.54 Loop 3. Sets S16 bit 0. If a connection
exists when this command is issued, the modem hangs up. The CONNECT
XXXX message is displayed upon the start of the test. When the AT&T1
command is entered, the modem goes on hook and configures itself for
analog loopback. DSR is turned OFF (if &S1 is in effect), the analog
loopback state is entered, and the test timer is set to the value in S18 (10
seconds). A connect result code is sent to the DTE, and the test timer then
begins its count down. The test is terminated when the test timer expires.
Results Code Description
CONNECT When local analog loopback state is entered.
ERROR If any other &Tn test is active (except &T0) or if in
OK After test is stopped by the test timer, the HO
the on-line command state.
command, or the &T0 command.
Revised Dec-2013 Modem Diagnostics 4-5
9600 bps PSTN Modem Instruction Manual
AT&T3
AT&T4
Perform Local Digital
Loopback
Grant Remote Digital
Loopback (RDL)
Requests
Perform local digital loopback, V.54 Loop 2. Sets S16 bit 2. If no connection
exists when this command is issued, ERROR is returned. Sets register S16
bit 4 when the test is in progress. The modem must be in the command
state (after connection is established) when this command is issued,
otherwise an ERROR result code will occur. The AT&T3 command
establishes a loopback of received data, after demodulation, and sends it
back to the distant end. The modem is configured for local digital loopback,
DSR is turned OFF (if &S1 is in effect), the test timer is started with the
value in S18 (10 seconds), and an OK result code is sent to the DTE.
Results Code Description
CONNECT After 2 second delay.
ERROR If any other self test is active (&T1, &T6, &T7 or &T8)
or if in idle state.
OK When test is terminated.
Grant remote digital loopback (RDL) requests - Enables digital loop-back
acknowledgment for remote request, i.e., an RDL request from a remote
modem is allowed. Sets register S23 bit 0 (Factory Default). When in the
on-line state, the modem will honor a remote digital loopback request from
a distant modem if it occurs. This will result in an ERROR if the command is
given while any V.54 test is active (&T1, &T3, &T6, &T7 or &T8). NOTE:
There are data patterns that may cause a Remote Digital Loopback
condition. Care should be given to the type of data being received so that
no RDL modes will be initiated.
AT&T5
AT&T7
Deny RDL Request Deny RDL request - Clears register S23 bit 0 (Profile Default). the modem
will not respond to a remote digital loopback request from a distant modem.
This will result in an error if the command is given while any V.54 test is
active (&T1, &T3, &T6, &T7 or &T8).
Initiate a Remote Digital
Loopback (RDL) With
Local Self Test
Initiate a remote digital loopback (RDL) with local self test - V.54 loop 2,
with self test. (In self test, a test pattern is looped back and checked by the
modem.) If no connection exists, ERROR is returned. The test is terminated
after the expiration of S18 (10 seconds) and the number of detected errors
is reported to the DTE. Register S16 bit 5 will be set when the test is in
progress. This is a system test, end to end. The command is valid if the
modems are in the command state with a connection established.
Configure the remote modem with an AT&T4 command so that it will honor
an RDL request. Enter AT&T7 at the local modem and it will send a digital
loopback request to the remote modem. After the RDL acknowledgment
signal has been received from the remote modem, DSR is turned OFF (if
&S1 is in effect), the on-line state is entered, an OK result code is sent to
the DTE, and the test timer is set to the value in S18 (10 seconds). While
the test is active, the local modem sends a test message to the remote
modem and counts the errors in the received (looped back) signal. The
modems stay in the command state during the test. When the test is
terminated (except by a loss of carrier), the local modem sends the release
signal to the remote modem, as in &T6, and reports the three-digit error
count to the DTE. The information text is followed by an OK result code.
The test is terminated by the S18 timer running out.
Results Code Description
OK When command executed is started.
4-6 Modem Diagnostics Revised Dec-2013
9600 bps PSTN Modem Instruction Manual
A
AT&T8
Local Loopback With
Self Test
OK
ERROR If not in the on-line command state.
ERROR If the RDL signal is not acknowledged.
Local loopback with self test - Initiates local analog loopback, V.54 Loop 3,
with self test. (In self test, a test pattern is looped back and checked by the
modem). If a connection exists, the modem hangs up before the test is
initiated. When the test is terminated either via expiration of S18, or via the
&T0 or H command, the number of detected errors is reported to the DTE.
Sets register S16 bit 6 when the test is in progress. This command may not
be available in some countries due to PTT restrictions. The modem should
be on hook. Enter AT&T8 to configure the modem for analog loopback and
self test. The test timer is started at the time indicated by S18 (10 seconds),
DSR is turned OFF (if &S1 is in effect). A self test condition is entered, and
an OK result code is sent to the DTE. During the test, the modem sends a
test message and counts the errors in the looped back signal. The test is
terminated when the timer (S18) times out. When the test is terminated, the
three digit error count is sent to the DTE. An OK result code follows the
error count.
Results Code Description
OK If a test state is entered.
OK After error count is sent to DTE.
fter error count is sent to DTE (&T1, &T3, &T6, &T7
or &T8).
ERROR If any other V.54 test is active (&T1, &T3, &T6, &T7)
or if on-line.
4.3 Modem LEDs
The 9600 bps - PSTN modem contains nine (9) LEDs. When Jumper
JP3 has been removed, these LEDs are disabled. These LEDs function
as follows:
Table 4-1. Modem LEDs
Board
ID
CR10 TXD Transmit Data When lit this LED indicates transmitting activity. Both
CR11
Label Function Description
MARK and SPACE data (TXD) from the host device
(DTE) are sent to the local modem (DCE) at J2-3.
RXD Receive Data When lit this LED indicates receiving activity. Both MARK
and SPACE data (RXD) are being sent from the local
modem to the host at J2-2.
When lit this LED indicates that the host is ready to send
CR12 RTS Request to Send
CR13 CTS Clear to Send
Revised Dec-2013 Modem Diagnostics 4-7
data to the local modem.
When lit this LED indicates that the local modem has
signaled the host that it is clear to receive data. CTS is
9600 bps PSTN Modem Instruction Manual
CR14 DTR Data Terminal
Ready
CR15 DCD Data Carrier Detect
CR16 DSR Data Set Ready
CR17 RI Ring Indicator
CR18 PWR Power
issued in response to an RTS.
When lit this LED indicates that the host has activated
the local modem.
When lit this LED indicates that the local modem detects
the presence of a carrier from a remote modem.
When lit this LED indicates that the local modem is
ready to send or receive data to/from the remote
modem.
When lit this LED indicates that the modem detects a
ring on the phone line.
When lit this LED indicates the modem has power.
4-8 Modem Diagnostics Revised Dec-2013
Chapter 5 – Specifications
5.1 Operating Specifications
9600 bps PSTN Modem Instruction Manual
Function:
Operating Modes:
Line Type:
Modem Configuration:
Data Rate:
Telephone Functions:
Approvals:
Trans. Output Levels:
PSTN Arrangements:
Provides PSTN (Public Switched Telephone
Network) communications.
Sync. or Async. 2-wire switched network - Half or
Full Duplex.
Two-wire loop start lines.
"AT" based commands.
V.32 bis - 9600 bps, V.32 - 9600 bps, V.22 bis -
2400 bps,
V.22 - 1200 bps or 600 bps, V.21 - 300 bps.
Bell 103J - 300 bps, Bell 212A - 1200 bps.
Dialing and answering by AT commands.
Automatic answering is also programmable.
Telephone - FCC Part 68. (also suitable for
approval within Canada).
-10 dBm fixed (USA) - (0-15 dBm adjustable firmware dependent).
Loop Start arrangement (transmission output
does not exceed -10 dBm). Allows connection to
any voice telephone jack.
Isolation:
Sleep Mode Current:
Surge Capability:
5.2 Environmental Specifications
Temperature:
Relative Humidity:
Vibration:
RFI Susceptibility:
EMI Radiated:
Data Access Arrangement (DAA) with 1000 Vac
(Modem to PSTN).
0.5mA (max) @ 12V (Input Voltage)
1.0 mA (Max) @ 6V (Input Voltage)
Withstand surge of 100A with 10 x 160S
waveform.
Operating Range: -40° to +60°C (-40° to 140°F)
Storage Range: -40°to +85°C (-40°to 185°F)
15% to 90% (Non-condensing)
1g for 10-500 Hz on any axis per SAMA PMC-31-1
without damage or impairment.
Meets susceptibility requirements of IEC 1000-4-6 level 2
(3V/M) from 150kHz to 80MHz.
Field connected circuits have been designed to meet the
requirements of IEC 1000-4-3 for radiated emissions.
Revised Dec-2013 Specifications 5-1
9600 bps PSTN Modem Instruction Manual
ESD
Susceptibility:
Surge
Susceptibility:
5.3 FCC & UL Approvals
Telephone Interface: FCC Part 68.
Environment: UL listed (pending) for use in Class I, Division 2,
5.4 Modem Connectors
5.4.1 Connector J1
PSTN RJ11 modem connector (J1) provides the interface to the PSTN
network via a modular phone cord and the Telephone Co. RJ11 jack.
Field connected circuits have been designed to meet the
requirements of IEC 1000-4-2 for ESD withstand
capability up to 15KV.
Field connected circuits have been designed to meet the
requirements of ANSI/IEEE C37.90.1-1989 (Formally
IEEE 472) for surge withstand capability.
Groups A, B, C and D hazardous locations.
Table 5-1. Primary Telephone RJ11 Connector - J1
J1 Pin # Signal Name Description Input/Output
1 N/A Not Used --2 N/A Not Used --3 T/R_1 (PSTN-tip) Transmit/Receive I/O
4 T/R_2 (PSTN-ring) Transmit/Receive I/O
5 N/A Not Used --6 N/A Not Used ---
5.4.2 Connector TB1
PSTN modem connector (TB1) provides tip/ring interface to the PSTN
via screw mount terminals (in lieu of connector J1).
Table 5-2. PSTN Connector - TB1
TB1 Pin # Signal Name Description Input/Output
3 PSTN-Tip Transmit/Receive I/O
4 PSTN-Ring Transmit/Receive I/O
5-2 Specifications Revised Dec-2013
5.4.3 Connector J2
A 9-pin D-Type connector for modem configuration and/or
DTE/Modem interfacing. These connectors are used for configuring the
modem with an ASCII terminal or a terminal emulation program (such
as PROCOMM Plus or SMARTCOM) and as the RS-232 data port
Table 5-3. RS-232 Data/Configuration Port D-Type Connector J2
J2 Pin # Signal Name Description Input/Output
1 DCD Data Carrier Detect O
2 RXD Receive Data O
3 TXD Transmit Data I
4 DTR Data Terminal Ready I
5 GND Ground --6 DSR Data Set Ready O
7 RTS Request To Send I
9600 bps PSTN Modem Instruction Manual
8 CTS Clear To Send O
Note: Pin 9 is not used.
5.4.4 Connector TB2
Terminal Block (TB2) is provided for ground (GND) connections.
Table 5-4. Ground Connector TB2
TB1 Pin # Signal Name Description Connection
1 Chassis Ground Ground Connect to DTE Ground Lug.
2 Surge Ground Ground Connect to DTE Ground Lug.
5.4.5 Connector TB4
Power Terminal (TB4) provides screw mount terminals for unregulated
power (+5.4 to +16Vdc and ground).
Table 5-5. - Unregulated Power Connector -TB4
TB1 Pin # Signal Name Description Input/Output
1 EXTVDC
2 GND Ground ---
Unregulated Power Input
(+5.4 to +16 VDC)
I
Revised Dec-2013 Specifications 5-3
Glossary
9600 bps PSTN Modem Instruction Manual
CTS Clear to Send - the local modem
signals the host that it is ready to
receive data. This is issued in
response to an RTS signal from
the host.
DCD Data Carrier Detect – the local
modem signals that it detects the
presence of a carrier from the
remote modem.
DCE Data Communications Equipment
DPSK Differential Phase Shift Keying
DSR Data Set Ready – the local modem
signals it is ready to send/receive
data from the remote modem.
DTE Data Terminal Equipment
DTR Data Terminal Ready – The host
has activated the local modem.
FSK Frequency Shift Keying
PSTN Public Switched Telephone
Network
QAM Quadrature Amplitude Modulation
RI Ring Indicator – the modem
detects a ring on the phone line
RTS Request To Send – a signal from
the host to the modem that the
host is ready to send data to the
modem.
RXD Receive Data – receive activity in
progress.
TCM Trellis-Coded Modulation
T/R Transmit / Receive
TXD Transmit Data – transmit activity in
progress.
Revised Dec-2013 Glossary G-1
9600 bps PSTN Modem Instruction Manual
p
/
D301734X012 December 2013
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