
Switch S3
18765432
S4-1:
T1.403 PRM:
Down - enabled Up
- disabled
S4-2:
Audible Alarm (buzzer)
Down
- disabled Up - enabled
NOTE: For future reference, all
DIP switches are provided with
upper and lower boxes to check
according to the particular user
selection. Factory default set-
tings are shown underlined
.
NET/DTE Connection
Pin DTE NET
1 Data Out Data In
2 Data Out Data In
3 Not used Not used
4 Data In Data Out
5 Data In Data Out
6 Not used Not used
7, 8 Chassis gnd Chassis gnd
NMS Connection
Pin NMS In/Out NMS Out
1 Not Used Not Used
2 Signal Gnd Signal Gnd
3 Data Out Data Out
4 Data In Not Used
5 Signal Gnd Signal Gnd
6 Not Used Not Used
8654321
Dn Up
7
8654321
Dn Up
7
8654321
Dn Up
7
Network LBO
: Sets the output signal
level of the transmitted data.
S3-1 S3-2 Line Build Out
Dn Dn 0 dB
Dn Up -7.5 dB
Up Dn -15.0 dB
Up Up -22.5 dB
S4-3 S4-4 Boot Mode
Dn Dn Boot from Switches
Dn Up Boot from RAM
Up Dn Boot from Manager
Up Up Boot from ROM
S4-5 S4-6 SUPV Port Rate
Dn Dn 19200 bps
Dn Up 9600 bps
Up Dn 2400 bps
Up Up 1200 bps
S4-7 S4-8 NMS Port Rate
Dn Dn 19200 bps
Dn Up 9600 bps
Up Dn 2400 bps
Up Up 1200 bps
S5-1:
Network Line Framing - matches the CSU to
the framing of the network line.
Down
- ESF Up - D4
S5-2:
DTE Line Framing - Matches the CSU to the
framing of the DTE line.
Down
- ESF Up - D4
S5-3:
Network Line Coding
Down - AMI Up
- B8ZS
S5-4:
DTE Line Coding
Down - AMI Up
- B8ZS
S5-5:
Network AIS - Sets the all ones signal sent
out to the network in a
Keep Alive
condition.
Down
- Unframed Up - Framed
S5-6:
Network Keep Alive Mode - Selects the ac-
tion to occur on a DTE loss of signal.
Down
- Send AIS Up - Loop NET data in to
NET data out
S5-7:
ESF CRC Mode - Regenerates the CRC
code or passes the CRC code through unchanged.
Down
- Regenerate Up - Pass
S5-8:
ESF FDL Mode - Terminates the received
data link in the CSU or passes it through unchanged.
Down
- Terminate Up - Pass
MSB LSB
S6-1:
Zero Suppression (ones density):
Down
- Enable Up - disable
S6-2:
Maintenance Reset
Down
- Off Up - On
S6-3 to S6-10:
The NMS address is defined
with this 8-bit binary code. The factory
default value is 1, which is S6-10 in the up
position and S6-3 through S6-9 down.
8654321
Dn Up
7 910
1
2
4
8
16
32
64
128
DTE LBO:
The output level of the
DTE interface should match the cable
length from the CSU DTE port to the
attached equipment.
S3-3 S3-4 S3-5 Distance
Dn Dn Dn 0 -110 ft
Dn Dn Up 110-220 ft
Dn Up Dn 220-330 ft
Dn Up Up 330-440 ft
Up Dn Dn 440-550 ft
Up Dn Up 550-655 ft
Up Up Dn > 655
Up Up Up Square
Clock
: Sets the CSU’s timing source
for data transmitted toward both the
network and DTE.
S3-6 S3-7 S3-8 Source
Dn Dn Dn Normal
Up Dn Dn Internal
Up Up Dn Network
Up Up Up DTE
TxPORT 2000 CSU Rear Panel
POWER/
ALARM
DTE
INTERFACE
NETWORK
INTERFACE
EXTERNAL
CLOCK
SUPV
NMS
IN/OUT
8
1
6
1
6
1
6
1
6
1
8
1
1
6
NMS
OUT
(not used)
Optional DB-15 Connection
Pin DTE NET
1 Data In Data Out
2 Frame Gnd Frame Gnd
3 Data Out Data In
4 Frame Gnd Frame Gnd
9 Data In Data Out
11 Data Out Data In
Power/Alarm Connection
Pin Function
1 48 VDC Return
2 Signal Ground
3 -48 VDC
4 Frame Ground
5 Alarm Contact
6Alarm Common
(optional
DB-15
available)
Network Cable Lengths
Cable
Type
Loss
per 1000'
Max
Length
26 gauge 6.8 dB 4,400 ft
24 gauge 5.4 dB 5,500 ft
22 gauge 4.2 dB 7,100 ft
19 gauge 3.0 dB 10,000 ft
(optional
DB-15
available)
Circuit Board View
Configuration Switch S3
Configuration Switch S6
Configuration Switch S4
Configuration Switch S5
Alarm
Relay
Switch S4
18765432
Switch S5
18765432
Switch S6
18765432910
This 3-pin jumper straps the ACO alarm contact.
Move the jumper to the left for normally open
operation (closes on alarm) or to the right for
normally closed operation (opens on alarm).
NCNO
Alarm Relay Mode
127 Jetplex Circle
Madison, Alabama 35758
Sales and Marketing
800-926-0085
205-772-3770
info@txport.com
Returns/RMA
800-926-0085, ext. 2227
Technical Support
800-285-2755
205-772-3770
support@txport
TRANSPORT
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