DCB SPL Multidrop User manual

8500025
SPL Multidrop
TABLE OF CONTENTS
SECTION 1 - DESCRIPTION.......................................................................2
SECTION 2 - SPECIFICATIONS .................................................................3
SECTION 3 - INSTALLATION.....................................................................5
SECTION 4 - CONTROLS AND INDICATORS...........................................7
SECTION 5 - NETWORK MANAGEMENT PORT....................................13
SECTION 6 - INTERFACE SIGNALS AND CABLING..............................21
.
SECTION 7 - TROUBLESHOOTING.........................................................27
SECTION 8 - WARRANTY.........................................................................30
Data Comm for Business, Inc.
PO Box 6329
Champaign, IL 61826-6329 August 7, 2002
217-897-6600 Firmware Version: 16.51 / 32.51
www.dcbnet.com

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1. DESCRIPTION
The DCB SPL MultiDrop Remote (SPLD) multiplexer is used in
conjunction with the SRX MultiDrop Host. The SPLD is a DCB SPL
hardware platform with optional MultiDrop firmware that allows it to
operate on multidrop analog or digital phone lines.
While similar in appearance to the SPL, the SPLD is a totally different
product designed for a different application and should be treated as
such. Some of the switches perform the same function on both units.
Some do not. Please refer to appropriate section of this manual for
SPLD switch functions.
POWER TRANSMIT
CONDITION RECEIVE ERROR MULTI- PLEXING TEST
DATA MULTIPLEXER
DCB
SPL
SPL Drop Multiplexer

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2. SPECIFICATIONS
2.1 Product
2.1.1 Data Ports
Port Speeds
Asynchronous only
300, 1200, 1800, 2400, 4800, 9600, 19,200 or 38,400 bps
Data Format
10 bits/character, 1 start, 1 stop, 8 data (including parity)
Interface
RS-232D, implemented in DB-25 female connectors
2.1.2 Composite Port
Speed
Synchronous, to 64 Kbps
Asynchronous at 1200, 2400, 4800, 9600, 19,200 or 38,400 bps
Interface
RS-232D, implemented in DB-25 male connector
2.2 Environmental
Operation: 0 to 65° C, 10 to 85% relative humidity
Storage: -40 to 85° C, 10 to 85% relative humidity
2.3 Physical / Electrical
10¼" W x 9¾" D x 2½" H - 2 thru 6 port units
10¼" W x 9¾" D x 4¼" H - 8 thru 14 port units
120 VAC external power supply
30 watts, .25 amps

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2.4 Network Management Port Commands
Help Network
Help Port
Show Port Configuration
Show ID
Show Map
Show Status
Show Network Configuration
Change Port Configuration
Change Delay Timeout
Change ID
Change Network Configuration
Activity Counts
Drop Activity
Zero Activity Counters
Flow Control
Test Tools
Capture Port
Copy Command
Show RS232
Test Message
Remote Test Loop
Monitor Port TX
Monitor Port RX
NMP Parity
Port Reset
Reset Mux
Type
Repeat Last Command
Disconnect NMP

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3. INSTALLATION
3.1 Unpacking
The following is included with each SPLD multiplexer
•Multiplexer and external power supply
•Cable for connecting a modem or DSU/CSU
•Manual
•Information regarding warranty, maintenance contracts and
repair
3.2 Location
Place the multiplexer in a clear area where you can reach the front
panel for setup and the rear panel to connect the cables. The
multiplexer has an external power supply that requires a properly
grounded 120 VAC outlet. The total power cord length is about 12 feet.
3.3 Setup
Each SPLD multiplexer must have a unique DROP ADDRESS set into
switches behind the front panel. In addition, each data port must have
the proper speed, parity and flow control settings. This is also done
with switches. See Section 4 for the location and proper setting of
switches.
3.4 Connections
The SPLD is connected to the modem or DSU/CSU using the cable
supplied. Connect the Network port on the multiplexer to the RS-232
interface port on the modem or DSU/CSU. The modem or DSU/CSU
must be set for controlled carrier operation (RTS controlled from
interface). This is absolutely required for the system to operate
properly. See your modem or DSU/CSU manual for information on how
to set the unit this way. For information regarding data port
connections to DTE devices, see Section 6.

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3.5 Installation Summary
1. Set the proper Drop Address into the 6-position DIP switch.
2. Configure the ports for correct speed, parity and flow control.
3. Set the modem or DSU/CSU for controlled carrier operation.
4. Connect the multiplexer Network port to the modem or
DSU/CSU using the cable supplied.
5. Connect the modem or DSU/CSU to the phone line.
6. Use the DA command, from Port 1 Setup, to verify the drop is
being polled. See paragraphs 5.2.1 and 5.4.12.
7. Check mapped ports for a login prompt from the host.

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4. CONTROLS AND INDICATORS
4.1 Switches
The front panel of the SPLD is held in place with magnets. It can be
easily removed by pulling on the small handles provided. Behind this
panel are one or more circuit boards. Each circuit board has several
banks of switches called DIP switches.
1 2 3 4 5 6 1 2 3 4 5 6 7 81 2 3 4 5 6 7 8
1 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 8
1 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 8
1 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 8
Network
Port 1
Port 2
Port 11 Port 14
Figure 1
Configuration Switches
Figure 1 illustrates the Network and Port Configuration switches. The
Network switch contains 6 sections numbered 1 thru 6. The Port
switches have 8 sections each.
4.1.1 Network Switch
4.1.1.1 Sync / Async
Position 1 of the Network switch is used to select synchronous or
asynchronous operation. When DOWN the network operates in
SYNCHRONOUS mode receiving clocks from the attached modem
device. When UP the network port operates ASYNCHRONOUS at the
rate set by the CN command (see paragraph 5.4.12).

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4.1.1.2 Drop Address
For a multidrop network to work properly, each SPLD multiplexer
must have a unique drop address. The Drop Address is set using
positions 2-6 of the Network switch. Firmware version 16.xx supports
16 drops (0 thru 15). Version 32.xx supports 32 drops.
Network Switch Position
2 3 4 5 6
Drop #
0Down Down Down Down Down
1Down Down Down Down Up
2Down Down Down Up Down
3Down Down Down Up Up
4Down Down Up Down Down
5Down Down Up Down Up
6Down Down Up Up Down
7Down Down Up Up Up
8Down Up Down Down Down
9Down Up Down Down Up
10 Down Up Down Up Down
11 Down Up Down Up Up
12 Down Up Up Down Down
13 Down Up Up Down Up
14 Down Up Up Up Down
15 Down Up Up Up Up
16 Up Down Down Down Down
17 Up Down Down Down Up
18 Up Down Down Up Down
19 Up Down Down Up Up
20 Up Down Up Down Down
21 Up Down Up Down Up
22 Up Down Up Up Down
23 Up Down Up Up Up
24 Up Up Down Down Down
25 Up Up Down Down Up
26 Up Up Down Up Down
27 Up Up Down Up Up
28 Up Up Up Down Down
29 Up Up Up Down Up
30 Up Up Up Up Down
31 Up Up Up Up Up

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4.1.2 Port Configuration
Ports are configured using the 8-position DIP switches. See Figure 1.
Position 1 is not used. Position 2 sets port loopback for troubleshooting.
Positions 3 thru 5 set flow control and parity. Positions 6 thru 8 set speed.
4.1.2.1 Port Loopback
Individual ports may be put in loopback using position 2 of the port
configuration switch. When UP, loopback is enabled. Port loopbacks
are used during troubleshooting and will be discussed in more detail in
Section 7. Normally this switch should be left down.
4.1.2.2 Flow Control and Parity
Flow control and parity must be set for each port using positions 3,
4 and 5 of the port DIP switch. This setting must match the
configuration of the attached DTE device and should match the
configuration of the host computer ports. The factory default is
Xon/Xoff Even.
Port Switch Position
345 Option
Down Down Down Xon/Xoff Even Parity
Down Down Up Xon/Xoff Odd Parity
Down Up Down Xon/Xoff Mark Parity
Down Up Up Xon/Xoff Space Parity
Up Down Down Xon/Xoff Transparent
Up Down Up CTS / No Busy
Up Up Down CTS / Busy Low
Up Up Up CTS / Busy High

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4.1.2.3 Port Speed
Port speed is set using positions 6, 7 and 8 of the port DIP switch. The
port speed must match the speed of the attached DTE device. The
factory default is 9600.
Port Switch Position
678 Speed
Up Up Down 38400 BPS
Up Up Up 19200 BPS
Down Down Down 9600 BPS
Down Down Up 4800 BPS
Down Up Down 2400 BPS
Down Up Up 1800 BPS
Up Down Down 1200 BPS
Up Down Up 300 BPS
1 2 3 4 5 6 1 2 3 4 5 6 7 81 2 3 4 5 6 7 8
1 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 8
1 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 8
1 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 81 2 3 4 5 6 7 8
Reset Switch Port 1 Setup/Normal Switch
Figure 2
Special Switches
4.1.3 Port 1 Setup
Port 1 setup is controlled by a three position toggle switch located on the
bottom circuit board between the Multiplexing and Test indicators (Figure
2). Normally this switch is left in the center position. When this switch
is pushed to the left, port 1 setup is enabled. This allows a terminal
connected to port 1 of the multiplexer to perform the functions of the
Network Management port. See Section 5 for information about Network
Management port functions.