Westermo TR-36 User manual

Tele and leased line modem
for RV-07 19” rack system
www.westermo.com
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REV.C 6614-2202 2008.08 Mälartryck AB, Eskilstuna, Sweden
©Westermo Teleindustri AB
User Guide
6614-2202
TR-36

26614-2202
Legal information
The contents of this document are provided “as is”. Except as required by applicable
law, no warranties of any kind, either express or implied, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose, are made
in relation to the accuracy and reliability or contents of this document. Westermo
reserves the right to revise this document or withdraw it at any time without prior
notice.
Under no circumstances shall Westermo be responsible for any loss of data or income
or any special, incidental, and consequential or indirect damages howsoever caused.
More information about Westermo can be found at the following Internet address:
http://www.westermo.com

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6614-2202
Safety
Before installation:
This modem is for restricted access area use only
Read this manual completely and gather all information on the unit. Make sure that
you understand it fully. Check that your application does not exceed the safe oper-
ating specifications for this unit.
This unit should only be installed by qualified personel.
This unit should be built-in to an apparatus cabinet, or similar, where access is
restricted to service personnel only.
The power supply wiring must be sufficiently fused, and if necessary it must be
possible to disconnect manually from the power supply. Ensure compliance to
national installation regulations.
This unit uses convection cooling. To avoid obstructing the airflow around the unit,
follow the spacing recommendations (see Cooling section).
Before mounting, using or removing this unit:
Prevent access to hazardous voltage by disconnecting the unit from power supply
and all other electrical connections.
Warning! Do not open connected unit. Hazardous voltage may occur within this
unit when connected to power supply or TNV circuits.
Prevent access to hazardous voltage by disconnecting the unit from power supply.
Warning! Do not open connected unit. Hazardous voltage may occur within this
unit when connected to power supply or TNV circuits.
Care recommendations
Do not drop, knock or shake the unit, rough handling above the specification may cause
damage to internal circuit boards.
Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit.
Do not paint the unit. Paint can clog the unit and prevent proper operation.
Do not expose the unit to any kind of liquids (rain, beverages, etc). The unit is not water-
proof. Keep the unit within the specified humidity levels.
Do not use or store the unit in dusty, dirty areas, connectors as well as other mechanical
part may be damaged.
If the unit is not working properly, contact the place of purchase, nearest Westermo dis-
tributor office or Westermo Tech support.
Maintenance
No maintenance is required, as long as the unit is used as intended within the specified
conditions.
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!

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Agency approvals and standards compliance
Type Approval / Compliance
EMC EN 61000-6-2, Immunity industrial environments
EN 55024, Immunity IT equipment
EN 61000-6-3, Emission industrial environments
Safety EN 60950-1, IT equipment
PSTN ETSI TS103 021-1, ETSI TS103 021-2, ETSI TS103 021-3

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6614-2202
Declaration of Conformity
Westermo Teleindustri AB
Declaration of conformity
Org.nr/
Postadress/Postal address Tel. Telefax Postgiro Bankgiro Corp. identity number Registered office
S-640 40 Stora Sundby016-428000 016-428001 52 72 79-4 5671-5550 556361-2604 Eskilstuna
Sweden Int+46 16428000 Int+46 16428001
The manufacturer Westermo Teleindustri AB
SE-640 40 Stora Sundby, Sweden
Herewith declares that the product(s)
Type of product Model Art no Installation manual
Rack mounted Tele and Leased
Line modem
TR-36 3614-0500 6614-2201
Rack RV-07 3130-3001 6614-2201
RackPS-20 HV 3120-3101 6614-2201
is in conformity with the following EC directive(s).
No Short name
89/336/EEG Electromagnetic Compatibility (EMC)
73/23/EEG Low Voltage Directive - LVD
References of standards applied for this EC declaration of conformity.
No Title Issue
EN 61000-6-2 Immunity for industrial environments 2 (2001)
EN 55024 Information technology equipment – Immunity 1 (1998)
EN 61000-6-3 Emission standard for industrial environments 1 (2001)
EN 60950 Safety of information technology equipment 6 (2000)
EN 50121-4 Railway signalling and telecommunications apparatus
IEC 62236-4 Railway signalling and telecommunications apparatus
The last two digits of the year in which the CE marking was affixed: 07
Hans Levin
Technical Manager
26th September 2007

66614-2202
Type tests and environmental conditions
Electromagnetic Compatibility
Phenomena Test Description Test levels
ESD EN 61000-4-2 Enclosure contact ± 6 kV
Enclosure air ± 8 kV
RF field AM modulated IEC 61000-4-3 Enclosure 10 V/m 80% AM (1 kHz), 80 – 1 000 MHz
20 V/m 80% AM (1 kHz), 80 – 2 000 MHz
RF field 900 MHz ENV 50204 Enclosure 20 V/m pulse modulated 200 Hz, 900 ± 5 MHz
Fast transient EN 61000-4-4 Signal ports ± 2 kV
Power ports ± 2 kV
Surge EN 61000-4-5 Signal ports
unbalanced
± 2 kV line to earth, ± 2 kV line to line
Signal ports balanced ± 2 kV line to earth, ± 1 kV line to line
Power ports ± 2 kV line to earth, ± 2 kV line to line
RF conducted EN 61000-4-6 Signal ports 10 V 80% AM (1 kHz), 0.15 – 80 MHz
Power ports 10 V 80% AM (1 kHz), 0.15 – 80 MHz
Power frequency
magnetic field
EN 61000-4-8 Enclosure 100 A/m, 50 Hz, 16.7 Hz & 0 Hz
Pulse magnetic field EN 61000-4-9 Enclosure 300 A/m, 6.4 / 16 ms pulse
Voltage dips and
interruption
EN 61000-4-11 AC power ports 10 & 5 000 ms, interruption
10 & 500 ms, 30% reduction
100 & 1 000 ms, 60% reduction
Mains freq. 50 Hz EN 61000-4-16 Signal ports 100 V 50 Hz line to earth
Mains freq. 50 Hz SS 436 15 03 Signal ports 250 V 50 Hz line to line
Voltage dips and
interruption
EN 61000-4-29 DC power ports 10 & 100 ms, interruption
10 ms, 30% reduction
10 ms, 60% reduction
+20% above & –20% below rated voltage
Radiated emission EN 55022 Enclosure Class B
Conducted emission EN 55022 AC power ports Class B
EN 55022 DC power ports Class B
Dielectric strength EN 60950 Signal port to other
isolated ports
2 kVrms 50 Hz 1 min
Power port to other
isolated ports
3 kVrms 50 Hz 1 min
2 kVrms 50 Hz 1 min (@ rated power <60 V)
Environmental
Temperature Operating 0 to +50ºC
Storage & Transport –25 to +70ºC
Humidity Operating 5 to 95% relative humidity non condensing.
Storage & Transport 5 to 95% relative humidity non condensing.
Altitude Operating 2 000 m / 70 kPa
Reliability prediction
(MTBF)
MIL-HDBK-
217F
Operating
Service life Operating 10 year
Packaging
Enclosure – – –
Dimension W x H x D 485 x 135 x 180 mm
Weight TR-36 0.14 kg
Weight Total
(17 TR-36 + 2 PS-20)
4 kg
Degree of protection IEC 529 Enclosure IP 20
Cooling Convection
Mounting 19” rack

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Description
TR-36 is designed to satisfy industry’s demands on reliability and functionality in environ-
ments with high levels of interference. The modem has an RS-232 interface and works
both as calling/answering and on 2- or 4-wire leased line. TR-36 can handle rates up to
115.2 kbit/s on the terminal side and up to 33.6 kbit/s on the line side. Specific param-
eters can also be set in hardware using DIP-switches.
The modem is equipped with transient protection on the line side and a “watchdog” that
monitors and automatically resets the modem in the event of a fault. These functions
together with the possibility for remote configuration makes the modem perfect for
installation at unmanned sites and prevent the need of costly service trips.
The modem also has password protection and dial-back security to ensure that only
authorised users can communicate with the modem.
TR-36 is intended for RV-07 19” rack system.
In the TR-36 there is also an RS422/485 interface allowing multidrop connections to
many types of industrial equipment.
… Data rate up to 33.6 kbit/s with Fast Connect
… Terminal rate up to 115.2 kbit/s
… 2- and 4-wire leased line
… V23 HDX with multidrop
… DTR and incoming data dialling
… DIP-switch configuration
… Watchdog
… Secure call back and access
… Industrial environment transient protection on all interfaces
… Up to 11 bits
… Tri-Galvanic isolation (interface/line/supply)
… Caller ID presentation and answering
… Remote configuration
… RS-422 / RS-485 interface
… Dial backup for PSTN and Leased Line

86614-2202
Interface specifications
Power RV-07, 17 pcs TR-36, PS-20 HV
Power supply 110 – 250 VDC +10 / –10%
115 – 230 VAC +15 / –10%
Power consumption 500/240 mA, 50 W
Rated frequency DC / 48 – 62 Hz
Fuse, F1 4 AS 5x 20 mm
Isolation to All other ports 3 kVrms 50 Hz 1 min
Connection Detachable screw terminal
Shielded cable Not required
* Direction relative this unit
Power RV-07, 17 pcs TR-36, ext 24 – 48 VDC
Power supply 24 – 48 VDC
Power consumption 34 W
Rated frequency DC
Isolation to All other ports 1.5 kVrms 50 Hz 1 min
Connection Detachable screw terminal**
Shielded cable Not required
* Direction relative this unit
** Maximum wire length to external power supply < 10 m.
Public Switched Telephone Network (PSTN)
Electrical specification Public Switched Telephone Network
Data rate 300 bit/s – 33.6 kbit/s
Protocol B103, B212, V21, V22, V22B, V23C,V23HDX, V32, V32B, V34
Protection Installation Fault Tolerant (up to ±60 V)
Isolation to Power port 3 kVrms 50 Hz 1 min
Leased line 2 kVrms 50 Hz 1 min
RS-232 2 kVrms 50 Hz 1 min
RS-485 2 kVrms 50 Hz 1 min
Connection Detachable screw terminal
Shielded cable Not required

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Leased Line (LL)
Electrical specification 2- or 4-wire Leased Line
Data rate 300 bit/s – 33.6 kbit/s
Protocol B103, B212, V21, V22, V22B, V23C, V23HDX, V23FDX, V32,
V32B, V34
Transmission range/ Budget PSTN 30 dB
Leased line 40 dB
Protection Installation Fault Tolerant (up to ±60 V)
Isolation to Power port
PSTN line
RS-232
RS-485
3 kVrms 50 Hz 1 min
2 kVrms 50 Hz 1 min
2 kVrms 50 Hz 1 min
2 kVrms 50 Hz 1 min
Connection Detachable screw terminal
Shielded cable Not required
RS-422/485
Electrical specification EIA/TIA-485 ITU V.112-wire or 4-wire twisted pair
Data rate 1200 bit/s – 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits,
Σ 9–12 bits
Protocol Transparent
Retiming Yes
Turn around time <10 µs (half duplex)
Transmission range 1200 m, depending on data rate and cable type (EIA RS-485)
Settings 120 W termination and failsafe biasing 680 W
Protection Installation Fault Tolerant (up to ±60 V)
Isolation to Power port 3 kVrms 50 Hz 1 min
PSTN line 2 kVrms 50 Hz 1 min
Leased line 2 kVrms 50 Hz 1 min
Connection Detachable screw terminal
Shielded cable Not required*
Miscellaneous Do not connect RS-232 and RS-422/485 simultaneously
* To minimise the risk of interference, a shielded cable is recommended when the cable is located inside 3 m
boundary to the rails and connected to this port.
The cable shield should be properly connected (360°) to an earthing point within 1 m from this port. This earth-
ing point should have a low impedance connection to the conductive enclosure of the apparatus cabinet, or
similar, where the unit is built-in. This conductive enclosure should be connected to the earthing system of an
installation and may be directly connected to the protective earth.

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RS-232
Electrical specification EIA/TIA-232
Data rate 1 200 bit/s – 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits;
Σ 9–12 bits
Protocol Transparent
Retiming Yes
Transmission range Cable length ≤15 m
Isolation to Power port 3 kVrms 50 Hz 1 min
PSTN line 2 kVrms 50 Hz 1 min
Leased line 2 kVrms 50 Hz 1 min
Connection 9-pin D-sub female (DCE) and Detachable screw terminal
(DCE )
Connector size Detachable screw terminal 0.2 – 2.5 mm2 (AWG 24 – 12)
Shielded cable Not required*
Conductive housing Isolated to all other circuits
Miscellaneous Do not connect RS-232 and RS-422 / 485 simultaneously
* To minimise the risk of interference, a shielded cable is recommended when the cable is located inside 3 m
boundary to the rails and connected to this port.
The cable shield should be properly connected (360°) to an earthing point within 1 m from this port.
This earthing point should have a low impedance connection to the conductive enclosure of the apparatus
cabinet, or similar, where the unit is built-in. This conductive enclosure should be connected to the earthing
system of an installation and may be directly connected to the protective earth.

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Leased Line
PSTN
RS-422/485
RS-232
LED Status Indicators
Connections
TR-36
Jack socket
Power
Position Direction* Description Product
marking
1 In AC: Neutral
DC: – Voltage
2 In AC: Line
DC: + Voltage
To minimise the risk of interference, a shielded cable is recommended when the cable is located inside 3 m
boundary to the rails and connected to this port.
The cable shield should be properly connected (360°) to an earthing point within 1 m from this port. This earth-
ing point should have a low impedance connection to the conductive enclosure of the apparatus cabinet, or
similar, where the unit is built-in. This conductive enclosure should be connected to the earthing system of an
installation and may be directly connected to the protective earth.
PSTN
Position Direction* Description
Screw terminal*
2 In/Out PSTN Transmit/ Receive
1 In/Out PSTN Transmit/ Receive
* The PSTN screw terminals are shared with 2-wire Leased line

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Leased Line
Position Direction* Description
1 Out 4-wireTransmit
In/Out 2-wire Receive/ Transmit
2 Out 4-wireTransmit
In/Out 2-wire Receive/ Transmit
3 In 4-wire Receive
In/Out 2-wire Receive/ Transmit at Leased line PSTN backup
4 In 4-wire Receive
In/Out 2-wire Receive/ Transmit at Leased line PSTN backup
* Direction relative this unit
RS-422/485
Position Direction Description Product marking
1 In R+ (A’) Receive RS-422/485 4-wire R+
2 In R– (B’) Receive RS-422/485 4-wire R–
3
Out T+ (A) Transmit RS-422/485 4-wire
T/R+
In/Out T+ (A/A’) Transmit/Receive RS-485 2-wire
4
Out T– (B) Transmit RS-422/485 4-wire
T/R–
In/Out T+ (A/A’) Transmit/Receive RS-485 2-wire
RS-232 (DCE)
Position
D-sub Direction* Description Product marking
1 Out Data Carrier Detect (DCD) DCD
2 Out Received Data (RD) RD
3 In Transmitted Data (TD) TD
4 In Data Terminal Ready (DTR) DTR
5 – Signal Ground (SG) SG
6 Out Data Set Ready (DSR) DSR
7 In Request To Send (RTS) RTS
8 Out Clear To Send (CTS) CTS
9 Out Ring Indicator (RI) RI
* Direction relative this unit

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LED indicators
LED Status Indication of
RTS OFF RTS signal is inactive
ON RTS signal is active
RD OFF No data
ON / FLASH The modem transmitting data on the DTE interface
TD OFF No data
ON / FLASH The modem receiving data on the DTE interface
DCD OFF DCD signal is inactive
ON DCD signal is active, modem has detected a carrier or the signal is
set to always on
REL OFF Reliable mode is off, direct or normal mode
ON Reliable mode is on
FLASH Reliable mode with error correction and compression
LINE OFF The modem is on-hook
ON The modem is off-hook with a established connection
FLASH Line backup interface in use
PWR OFF The modem has no power
ON The modem is up and running

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DIP-switch settings
Before DIP-switch settings:
Prevent damage to internal electronics from electrostatic discharges (ESD)
by discharging your body to a grounding point (e.g. use of wrist strap).
NOTE DIP-switch alterations are only effective after a power on.
!
S1 DIP-switch
Selection of DTE speed
ON
1 2 3 4 5 6 7 8
300 bit/s
ON
1 2 3 4 5 6 7 8
9600 bit/s
ON
1 2 3 4 5 6 7 8
600 bit/s
ON
1 2 3 4 5 6 7 8
19.2 kbit/s
ON
1 2 3 4 5 6 7 8
1200 bit/s
ON
1 2 3 4 5 6 7 8
38.4 kbit/s
ON
1 2 3 4 5 6 7 8
2400 bit/s
ON
1 2 3 4 5 6 7 8
57.6 kbit/s
ON
1 2 3 4 5 6 7 8
4800 bit/s
ON
1 2 3 4 5 6 7 8
115.2 kbit/s
S1 DIP-switch
Stored values / Auto detect
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
Auto detect*
4
3
2
1
4
3
2
1
S1 S2 S3 S4 S5
* 300 and 600 bit/s not supported

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S2 DIP-switch
Leased Line Mode selection
ON
1 2 3 4 5 6 7 8
Leased line disable,
PSTN enable
ON
1 2 3 4 5 6 7 8
Leased line answering
ON
1 2 3 4 5 6 7 8
Leased line V.23 multidrop
For V.23 Multidrop settings,
see selection below.
ON
1 2 3 4 5 6 7 8
Leased line calling
S1 DIP-switch
Selection of DTE format
ON
1 2 3 4 5 6 7 8
7E 1S
ON
1 2 3 4 5 6 7 8
7E 2S
ON
1 2 3 4 5 6 7 8
7O 1S
ON
1 2 3 4 5 6 7 8
7O 2S
ON
1 2 3 4 5 6 7 8
8N 1S
ON
1 2 3 4 5 6 7 8
8N 2S
ON
1 2 3 4 5 6 7 8
8E 1S
ON
1 2 3 4 5 6 7 8
8E 2S
ON
1 2 3 4 5 6 7 8
8O 1S
ON
1 2 3 4 5 6 7 8
8O 2S
ON
1 2 3 4 5 6 7 8
Direct mode 8E1 or 8O1
8O1 in command mode
ON
1 2 3 4 5 6 7 8
Direct mode 8E2 or 8O2
8N2 in command mode
ON
1 2 3 4 5 6 7 8
Direct mode 7E1 or 7O1
8N1 in command mode
ON
1 2 3 4 5 6 7 8
Direct mode 7E2 or 7O2.
8N2 in command mode
ON
1 2 3 4 5 6 7 8
7N 2S
S2 DIP-switch
DTE interface Selection
ON
1 2 3 4 5 6 7 8
RS-422/485 disable,
RS-232 enable
ON
1 2 3 4 5 6 7 8
RS-422/485 enable,
RS-232 disable

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S2 DIP-switch
Leased line 2/4 wire selection
ON
1 2 3 4 5 6 7 8
Leased line 2-wire
ON
1 2 3 4 5 6 7 8
Leased line 4-wire
S2 DIP-switch
Selection PSTN backup of Leased line
ON
1 2 3 4 5 6 7 8
Backup of leased line disabled
ON
1 2 3 4 5 6 7 8
Backup of leased line enabled
S2 DIP-switch
Selection of answering/calling mode for PSTN backed up Leased Line
ON
1 2 3 4 5 6 7 8
Answering
ON
1 2 3 4 5 6 7 8
Calling
S2 DIP-switch
Remote configuration control
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
Remote configuration disabled
S2 DIP-switch
RS-422/485
ON
1 2 3 4 5 6 7 8
RS-422/485, 2-wire
ON
1 2 3 4 5 6 7 8
RS-422/485, 4-wire

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S3 DIP-switch
Selection of line speed and modulation
ON
1 2 3 4 5 6 7 8
Use saved parameters
defined by AT+MS
ON
1 2 3 4 5 6 7 8
V.34, 1 9600
ON
1 2 3 4 5 6 7 8
V.21 300
ON
1 2 3 4 5 6 7 8
V.32bis 14400
ON
1 2 3 4 5 6 7 8
V.23 1200 hdx
ON
1 2 3 4 5 6 7 8
V.34 19200
ON
1 2 3 4 5 6 7 8
V.22 1200
ON
1 2 3 4 5 6 7 8
V.34 24000
ON
1 2 3 4 5 6 7 8
V.22bis 2400
ON
1 2 3 4 5 6 7 8
V.34 28 800
ON
1 2 3 4 5 6 7 8
V.32bis 4800
ON
1 2 3 4 5 6 7 8
V.34 33600
ON
1 2 3 4 5 6 7 8
V.32bis, 1 9600
ON
1 2 3 4 5 6 7 8
Automatic line speed
ON
1 2 3 4 5 6 7 8
V.32bis 9600
S3 DIP-switch
Flow control DTE interface
ON
1 2 3 4 5 6 7 8
Use stored value for AT&Kn
ON
1 2 3 4 5 6 7 8
RTS/CTS flow control enable
(AT&K3)
S3 DIP-switch
PLC parameter setting
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
PLC settings
(ATQ1E0&C1&K0&A1)
S3 DIP-switch
Dial abort
S3 DIP-switch
Blind dialing
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
Dial abort disabled (AT&A1)
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
Enable blind dialling (ATX3)

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S4 DIP-switch
Auto retrain control
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
Auto retrain disabled (AT%E0)
S4 DIP-switch
Data compression control
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
Data compression disabled
(AT%C0)
S4 DIP-switch
DCD, DTR and DSR control
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
DCD and DSR always on,
DTR ignored (AT&C0&D0&S0)
S4 DIP-switch
Set modem to factory default
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
Restore factory default setting*
Don’t leave S4:1 in ON position if not intended to restore factory setting at every power on.
ON
1 2 3 4 5 6 7 8
Use stored values
ON
1 2 3 4 5 6 7 8
Reliable mode enable (AT\N2)
ON
1 2 3 4 5 6 7 8
Buffer mode enabled (AT\N0)
S4 DIP-switch
Line mode setting
S4 DIP-switch
Leased Line termination
ON
1 2 3 4 5 6 7 8
Termination disabled
ON
1 2 3 4 5 6 7 8
Termination of Receiver
in 4-wire mode
ON
1 2 3 4 5 6 7 8
Termination of Transmitter / Receiver
in 2-wire mode and Transmitter in
4-wire mode
ON
1 2 3 4 5 6 7 8
Termination of both Transmitter
and Receiver in 4-wire mode
ON
1 2 3 4 5 6 7 8
Direct Mode enabled (AT\N1)

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ON
1 2 3 4 5 6 7 8
S1
ON
1 2 3 4 5 6 7 8
S3
ON
1 2 3 4
S5
ON
1 2 3 4 5 6 7 8
S2
ON
1 2 3 4 5 6 7 8
S4
Factory settings
S5 DIP-switch
RS-422/485 termination
ON
1 2 3 4
No termination
ON
1 2 3 4
Termination of R in 4-wire
connection
ON
1 2 3 4
Termination of both T and R
in 2-wire connection
ON
1 2 3 4
Termination of both T and R
in 4-wire connection

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S1 DIP-switch
Selection of DTE speed
ON
1 2 3 4 5 6 7 8
1200 bit/s
S2 DIP-switch
Leased line mode selection
ON
1 2 3 4 5 6 7 8
1200 bit/s leased line /mulidrop
S3 DIP-switch
V.23 line modulation
ON
1 2 3 4 5 6 7 8
V.23 1200 HDX/FDX
S1 DIP-switch
Selection of DTE-format
ON
1 2 3 4 5 6 7 8
8E1, 8O1, 8O1
in command mode
ON
1 2 3 4 5 6 7 8
8E2, 8O2, 8N2
in command mode
ON
1 2 3 4 5 6 7 8
7E1, 7O1, 8N1, 8N1
in command mode
ON
1 2 3 4 5 6 7 8
7E2, 7O2, 8N2, 8N2
in command mode
S2 DIP-switch
Leased line 2/4-wire selection
ON
1 2 3 4 5 6 7 8
2-wire leased line
ON
1 2 3 4 5 6 7 8
4-wire leased line
S3 DIP-switch
Carrier active using RTS or incoming data
ON
1 2 3 4 5 6 7 8
Incoming data
ON
1 2 3 4 5 6 7 8
RTS controlled
S4 DIP-switch
Permanent carrier control
ON
1 2 3 4 5 6 7 8
Disabled
ON
1 2 3 4 5 6 7 8
Enabled
V.23 2- / 4-wire HDX- / FDX-leased line settings