RFL Electronics DS-961DE Installation and user guide

RFL Electronics Inc.
I N S T R U C T I O N D A T A
RFL DS-961DE Five-Port Multi-Rate
Synchronous Data Module
DESCRIPTION
The DS-961DE is a five-port multi-rate synchronous data channel module, designed for use in IMUX
2000 E1 Multiplexers. The module uses an RS-232C interface to enable transmission of up to five 9.6
kbps or two 19.2 kbps data signals over E1 and other digital communications facilities, using only one
64 kbps time slot.
The DS-961DE has three switch banks, one setup jumper, and four LEDs, one each for channels
transmitting, channels receiving data, no framing bit, and transmit fault.
The DS-961DE is remote-controllable when installed in an RFL remote controllable shelf. The
following module parameters can be configured remotely via SCB or locally via DIP switches.
User-adjustable switches and jumpers allow configuration of the following parameters:
o Data rate selection from 1200 bps to 19.2 kbps
o Optional three-channel operation (two at 19.2 kbps, one at 9.6 kbps)
o Selection of transmit timing or terminal timing
o Selectable transmit/receive direction for drop and insert operation
o Optional timing inversion
o Switchable loopback of all channels at the receive side
o Time slot selection
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SPECIFICATIONS
As of the date this Instruction Data Sheet was published, the following specifications apply to the RFL
DS-961DE module. Because all of RFL products undergo constant improvement and refinement, these
specifications are subject to change without notice.
Multiple Synchronous
Data Channels: Full duplex, five independent RS-232 data ports
Clock/Data Rates: Five channel operation:
A selectable common rate of 1200 bps, 2400 bps, 4800 bps, or 9600 bps
Two channel operation:
A common rate of 19.2 kbps
Three channel operation:
Two channels at 19.2 kbps, one at 9600 bps
Timing: Selectable, internal or external
Buffer: Three-bit when using external timing source (terminal timing)
Time Slot: Five channels occupy a single selectable 64 kbps time slot
RS-232 Interface: Supports TXD, RXD, RX TIMING, TX TIMING, TERMINAL
TIMING, GROUND
Remote Interface: Compatible with SCL remote command language, allows module
configuration and status access
Connector: The DS-961DE requires the use of an MA-404A Module Adapter, which
provides five RJ-11 jacks for the RS-232 interfaces
Temperature: 0°- 50°C Operating
Humidity: 0% - 90% Non-condensing
Power Consumption: 1.2 watts nominal

INSTALLATION
Before the RFL DS-961DE module can be placed in service, it must be installed in a multiplexer shelf.
Installation involves determining the module slot in the Main Shelf or Expansion Shelf where the
module will be installed, inserting a Module Adapter into the rear of the shelf behind the module slot,
connecting all signal and power wiring to the Module Adapter, checking the settings of all switches,
and inserting the module into the front of the shelf.
NOTES
Power supply and time slot considerations may affect the installation of this module into an
existing multiplexer shelf. Refer to the multiplexer manual for more information.
The following instructions are provided for installing an RFL DS-961DE module into an existing
system. If the module was included as part of a system, installation was done at the factory. Otherwise,
proceed as follows:
1. Carefully inspect the module for any visible signs of shipping damage. If you suspect damage
to the module, immediately call RFL Customer Service at the number listed at the bottom of
this page.
2. Determine the module slot in the Main Shelf or Expansion Shelf where the module will be
installed.
The RFL DS-961DE module occupies one module slot in the Main Shelf or
Expansion Shelf.
3. Each module in the IMUX 2000 multiplexer requires a Module Adapter. The module adapter
provides the appropriate connector for the desired interface.
The DS-961DE Data Module uses an MA-404A Module Adapter. The MA-404A
accepts up to five RS-232C lines via RJ-11 modular input connectors. Figure 1
shows the input jack arrangement. If you are setting up the module for two
channels at 19.2 kbps each, use only the first two jacks. For three channel
operation, use the first two jacks for 19.2 kbps and the fifth jack for 9.6 kbps. The
modes of operation are illustrated in Figure 2.
Jumpers on the MA-404A are used to select normal or three channel mode of
operation. For NORMAL mode (two or five channel), set jumpers J1, J2 and J3 to
the NORMAL position. For THREE CHANNEL mode, set jumpers J1, J2 and J3
to the THREE-CHANNEL position. Figure 3 illustrates these jumper settings.
4. Insert the MA-404A Module Adapter into the rear of the slot which will hold the RFL DS-
961DE module, and make all connections to the module adapter.
Connect the RJ-11 input lines, and insert the MA-404A into the rear of the slot
that will hold the DS-961DE module.
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RFL DS-961DE RFL Electronics Inc.
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RJ11
Pin # Signal Name RS-232 DB25 Pin #
1
2
3
Transmit Timing
Transmit Data
Terminal Timing
15
2
24
4
5
6
Receive Data
Ground
Receive Timing
3
7
17
MA-404A
Figure 1. MA-404A Module Adapter Input Configuration.
5. Refer to Figure 4 and Table 2 for the location and function of DIP switches on the DS-961DE.
6. Set the module address using DIP switches SW1-1 through SW1-6 for the desired remote
address (SCB address).
For remote access, each channel module in the IMUX 2000 E1 must have a distinct
module address. Valid addresses are the numbers “1” to “36”. In most
installations the address will be set to the number of the slot the module is occupying.
Table 3 shows the switch settings for the module address. (Consult your multiplexer
manual for details on using the remote access and configuration features of
the system.)
7. Set the channel configuration jumpers. To use this module in five channel mode at any data
rate, or in two channel mode at 19.2 kbps, set jumper J1 to the NORMAL position as shown in
Table 1 and Figure 4. Set the jumpers on the module adapter to the NORMAL position as
shown in Figure 3.
To use the module in three channel mode (two channels at 19.2 kbps, and one channel at 9.6
kbps), make the following settings:
a. Set jumper J1 to the THREE CHANNEL position.
b. Set SW3-4 to the UP position (buffers out of circuit, uses DS-961DE module timing).
c. Set the jumpers on the module adapter to the THREE CHANNEL position as shown in
Table 1 and Figure 3.
CH
1
CH
2
CH
3
CH
4
CH
5
RJ11
Jack
Pin 6
Pin 1

MA-404A
CH
1
CH
2
CH
3
CH
4
CH
5
MA-404A
CH
1
CH
2
CH
3
CH
4
CH
5
MA-404A
CH
1
CH
2
CH
3
CH
4
CH
5
2-Channel 3-Channel 5-Channel
Mode Mode Mode
19.2kbps
(fixed)
19.2kbps
(fixed)
19.2kbps
(fixed)
19.2kbps
(fixed)
9.6kbps
(fixed)
Four data
rates can be
selected for all
5 channels
(1200, 2400,
4800 or
9600). See
Table 4 for
switch
settin
g
s.
Figure 2. DS-961DE/MA-404A modes of operation
Table 1. DS-961DE/MA-404A Switch and Jumper Settings for various modes of operation
DS-961D MA-404AMode Of
Operation Data Rate Switch Setting Jumper Setting Jumper Settings
2-Channel CH1 and CH2
Fixed at
19.2kbps
SW3-3 set to UP J1 set to NORMAL J1, J2 and J3 set to
NORMAL
3-Channel CH1 and CH2
Fixed at
19.2kbps, and
CH5 fixed at
9.6kbps
SW3-3 set to UP J1 set to 3-
CHANNEL J1, J2 and J3 set to
3-CHANNEL
5-Channel CH1 to CH5
all set to the
same data
rate as
follows:
1200, 2400,
4800 or 9600.
See Table 4
for switch
settings
SW3-3 set to DOWN J1 set to NORMAL J1, J2 and J3 set to
NORMAL
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8. Select the time slot using DIP switches SW2-1 to SW2-5.
9. Set for use in a terminal or drop/insert multiplexer by using DIP switch SW2-6.
10. Select the data rate by using DIP switches SW3-1 and SW3-2. (See Table 5)
11. Select the buffer-in timing by using DIP switch SW3-4. If using three channel mode, this
should be set to the UP position.
12. If using internal DS-961DE module timing, set each channel to normal or inverted clock by
using DIP switches SW3-5 to SW3-9.
13. Set the loop switch, SW3-10, to the UP (OFF) position.
14. If you plan to operate the RFL DS-961DE module under local control, perform the following
steps; otherwise, go to step 15 for remote control.
a. Set to local control by placing DIP switch SW1-7 in the OFF position.
b. Turn service on by placing DIP switch SW1-8 in the OFF position.
c. Slide the module into the selected module slot until it is firmly seated and the module
front panel is flush with the top and bottom of the shelf.
d. Go to step 16.
15. If you plan to operate the RFL DS-961DE module under remote control, perform the following
steps:
a. Set to local control by placing DIP switch SW1-7 in the OFF position.
b. Turn service off by placing DIP switch SW1-8 in the ON position.
c. Slide the module into the selected module slot until it is firmly seated and the module
front panel is flush with the top and bottom of the shelf.
d. Wait 15 seconds for the RFL DS-961DE module’s parameter settings to be loaded into
the shelf Common Module.
e. Pull the module out of the shelf and place DIP switch SW1-7 in the ON position.
f. Slide the module back into the shelf.
g. Verify the module configuration through remote control by issuing a “CONFIG?”
query. See the Remote Control Interface section of this Instruction Data Sheet
for an explanation of the “CONFIG?” response.
h. Turn service on through remote control by issuing a “SRVC=ON” command.
The RFL DS-961DE’s operating parameters can now be changed by remote
control. See the Remote Control Interface section of this Instruction Data
Sheet for more information.
i. Go to step 16.

NORM 3-CH J3
J2 NORM 3-CH J1
Figure 3. MA-404A Module Adapter jumper settings
16. On the Module Record Card located to the right of the shelf, record the channel bank type, time
slot, and any other pertinent information.
The RFL DS-961DE is now installed. If your multiplexer is set up for remote access and control, you
can now change the operating parameters of the module by using simple commands. For more
information on remote access and control, consult your multiplexer operation manual.
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J1
SW3
SW2
TX BUSY LED
SW1
FRM LED
TX FAULT LED
JMP1
NORMAL mode
3-CHANNEL mode
NORM 3-CH
Figure 4. Controls and indicators, RFL DS-961DE Synchronous Data Module
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Table 2. Controls and indicators, RFL DS-961DE Module
Control/
Indicator Label Setting Description
Jumper J1 NORMAL
3-CHANNEL
Sets module to 2-channel mode or 5-channel mode.
Sets module to 3-channel mode.
LED DS1 (green) TX BUSY . . . Indicates if one or more channels is transmitting.
LED DS3 (red) FRM . . . Indicates if the receiver side of the module cannot find the proper
framing bit in the receive time slot selected. A card level ALERT
signal is sent to the Common Module
LED DS4 (red) TX FAULT . . . Indicates if a fault is detected in the transmit circuitry of the logic
array. A card level ALARM signal is sent to the Common Module.
SW1-1 to SW1-6 . . . . . . Sets card address for remote access in accordance with Table 3.
(See Note 1 below).
SW1-7 . . . ON
OFF
Sets module to remote control (See Note 1 below).
Sets module to local control.
SW1-8 . . . ON
OFF
Module service is disabled.
Module service is enabled.
SW2-1 to SW2-5 TIME SLOT
SELECT . . . Select time slot in accordance with Table 4.
SW2-6 TX A BUS UP
DOWN
Operate via DI-B port in a drop/insert multiplexer (see page 14).
Operate in a terminal multiplexer, or via DI-A port in a drop/insert
multiplexer.
SW3-1 & SW3-2 RATE 1
RATE 2 . . . Select data rate in 5-Channel mode in accordance with Table 5.
SW3-3 SEL 9.6 UP
DOWN
Selects 2 or 3-Channel mode (Ports 1 & 2 = 19.2)
Selects 5-Channel mode
SW3-4 BUF IN UP
DOWN
Takes buffers out of circuit and sets module to use its internal timing
(See Note 2 below).
Places buffers in circuit and sets module to use DTE device timing.
SW3-5 to SW3-9 INV
A,B,C,D,E UP
DOWN
Standard timing for selected channel.
Inverts timing for selected channel (See Note 3 below)
SW3-10 LOOP UP
DOWN
Turns loopback off (normal operation) .
Turns loopback on (See Note 4 below).
1. When this module is installed in a non-remote controllable multiplexer SW1-1 to SW1-7 must be OFF.
2. The input buffers must be used when the DTE device timing is in use, so this switch sets both of these
conditions.
3. These switches are active only when internal timing is selected (SW3-4).
4. When the loop switch is DOWN, all five receive channels are looped back into the transmitter (used for far
end loopback during end to end testing).

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Table 3. SCB address settings, RFL DS-961DE module
SCB
ADDRESS SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6
1 OFF ON ON ON ON ON
2 ON OFF ON ON ON ON
3 OFF OFF ON ON ON ON
4 ON ON OFF ON ON ON
5 OFF ON OFF ON ON ON
6 ON OFF OFF ON ON ON
7 OFF OFF OFF ON ON ON
8 ON ON ON OFF ON ON
9 OFF ON ON OFF ON ON
10 ON OFF ON OFF ON ON
11 OFF OFF ON OFF ON ON
12 ON ON OFF OFF ON ON
13 OFF ON OFF OFF ON ON
14 ON OFF OFF OFF ON ON
15 OFF OFF OFF OFF ON ON
16 ON ON ON ON OFF ON
17 OFF ON ON ON OFF ON
18 ON OFF ON ON OFF ON
19 OFF OFF ON ON OFF ON
20 ON ON OFF ON OFF ON
21 OFF ON OFF ON OFF ON
22 ON OFF OFF ON OFF ON
23 OFF OFF OFF ON OFF ON
24 ON ON ON OFF OFF ON
25 OFF ON ON OFF OFF ON
26 ON OFF ON OFF OFF ON
27 OFF OFF ON OFF OFF ON
28 ON ON OFF OFF OFF ON
29 OFF ON OFF OFF OFF ON
30 ON OFF OFF OFF OFF ON
31 OFF OFF OFF OFF OFF ON
32 ON ON OFF ON ON OFF
33 OFF ON OFF ON ON OFF
34 ON OFF OFF ON ON OFF
35 OFF OFF OFF ON ON OFF
36 ON ON OFF ON ON OFF
NOTE: For SW1, ON = UP and OFF = DOWN.

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Table 4. Time Slot Selection for RFL DS-961DE module.
Time Slot SW2-1 SW2-2 SW2-3 SW2-4 SW2-5
01UP UP UP UP UP
1 UP UP UP UP DOWN
2 UP UP UP DOWN UP
3 UP UP UP DOWN DOWN
4 UP UP DOWN UP UP
5 UP UP DOWN UP DOWN
6 UP UP DOWN DOWN UP
7 UP UP DOWN DOWN DOWN
8 UP DOWN UP UP UP
9 UP DOWN UP UP DOWN
10 UP DOWN UP DOWN UP
11 UP DOWN UP DOWN DOWN
12 UP DOWN DOWN UP UP
13 UP DOWN DOWN UP DOWN
14 UP DOWN DOWN DOWN UP
15 UP DOWN DOWN DOWN DOWN
162DOWN UP UP UP UP
17 DOWN UP UP UP DOWN
18 DOWN UP UP DOWN UP
19 DOWN UP UP DOWN DOWN
20 DOWN UP DOWN UP UP
21 DOWN UP DOWN UP DOWN
22 DOWN UP DOWN DOWN UP
23 DOWN UP DOWN DOWN DOWN
24 DOWN DOWN UP UP UP
25 DOWN DOWN UP UP DOWN
26 DOWN DOWN UP DOWN UP
27 DOWN DOWN UP DOWN DOWN
28 DOWN DOWN DOWN UP UP
29 DOWN DOWN DOWN UP DOWN
30 DOWN DOWN DOWN DOWN UP
31 DOWN DOWN DOWN DOWN DOWN
Notes:
1. Do not use. Time slot 0 is always reserved for E1 framing use.
2. Do not use if E1 signaling is CAS. Time slot 16 is reserved for signaling and multi-frame synchronization in the
CAS signaling format. If CCS signaling is used, time slot 16 is available for payload.
Table 5. Data Rate Selection for RFL DS-961DE module in 5-Channel mode
Data Rate SW3-1 SW3-2
1200 bits/second UP UP
2400 bits/second UP DOWN
4800 bits/second DOWN UP
9600 bits/second DOWN DOWN

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FUNCTIONAL DESCRIPTION
The DS-961DE Data Module has three basic configuration modes:
1. Five independent full duplex data channels with a common data rate of 1200 to 9600 bps.
2. Two independent full duplex data channels with a data rate of 19.2 kbps.
3. Two independent full duplex data channels with a data rate of 19.2 kbps, plus a third
independent channel with a data rate of 9600 bps.
Figure 5 shows a block diagram of the DS-961DE.
TRANSMIT SIDE
Each input signal enters via a connection to the module adapter at the rear of the shelf. Data and timing
pass to the RS-232 line receivers on the DS-961DE module. The module can be set to use transmit
timing from either the Data Terminal Equipment (DTE) input signals, or the DS-961DE internal
module timing. The line receivers convert each channel to TTL output. If DTE timing is in use, each
channel then goes to its own three-bit buffer.
The Logic Array multiplexes the five channels together, adds a framing bit, and feeds the resulting
bitstream to the main multiplexer for transmission in the desired direction. User-selectable switches on
the module determine which time slot is used.
RECEIVE SIDE
The high speed multiplexed data from the receive direction enters the receive side of the Logic Array.
The Logic Array feeds the framing bit to a synchronization counter, which provides the proper timing
and phase to read out the five data channels.
The Logic Array and synchronization counter separate the data back into five TTL data signals. Each
channel then goes to an RS-232 line driver, which converts it back to RS-232 level. Finally, the RS-
232 output signal goes to the module adapter, where it passes to the output connector.
ALERTS/ALARMS
The RFL DS-961DE module reports the following module level ALERT or ALARM signals to the
shelf Common Module. If the receive side cannot find a proper framing bit in the time slot selected,
the DS-961DE will light its “FRM” LED and send a card-level ALERT to shelf Common Module. If a
fault is detected in the transmit circuitry, the module will light its “TX FAULT” LED and send a card-
level ALARM to the shelf Common Module.

TX TX
BUSY FAULT FRM
BUS DRIVERS
AND RECEIVERS
LOGIC ARRAY
RS-232 LINE DRIVERS
AND RECEIVERS
MODULE ADAPTER
1 RATE 1
2 RATE 0
3 SELECT 19.2 OR 9.6
4 SELECT BUFFER IN
5 INVERT CLOCK A
6 INVERT CLOCK B
7 INVERT CLOCK C
8 INVERT CLOCK D
9 INVERT CLOCK E
10 LOOPBACK CONTROL
1
2
3 SET CARD
4 ADDRESS
5
6
7 LOCAL/REMOTE CONTROL
8 SERVICE ON/OFF
SW1
1
2
3 SELECT
4 TIME SLOT
5
6 SELECT TX/RX BUS
SW2
SW3
TDM BUS SERIAL CONTROL BUS
CH2 CH3 CH4 CH5
TX
DATA TER-
MINAL
TIMING
RX
DATA TX
CLOCK
CH2 CH3 CH4 CH5
TX
DATA
TER
MIN-
AL-
TIM-
ING
RX
DATA RX
CLOCK TX CLOCK GRO-
UND
CH1
CH1
Figure 5. DS-961DE Data Module, Block Diagram
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DROP AND INSERT OPERATION
A drop and insert multiplexer operates at a central node on a three (or more) node system. In the
example shown in Figure 6, node 2 has a drop and insert multiplexer whose DI/A port is connected to
the transmission line to node 1, and whose DI/B port is connected to the transmission line to node 3.
Individual payload channels may connect nodes 1 and 2, 1 and 3, or 2 and 3.
In the drop and insert multiplexer at node 2, a DS-961DE module can be set to transmit and receive
either via the DI/A port (toward node 1) or via the DI/B port (toward node 3), but not both.
When a DS-961DE is installed in a terminal multiplexer (node 1 or node 3), its TX-A switch must be
set DOWN. However, when it is installed in a drop and insert multiplexer (node 2) the TX-A switch
setting must be DOWN to transmit and receive via the DI/A port (toward node 1) and UP to transmit
and receive via the DI/B port (toward node 3).
DS-
961DE
To/From
Site 2
(TX-A
Switch
DOWN)
DS-
961DE
To/From
Site 3
(TX-A
Switch
DOWN)
DS-
961DE
To/From
Site 1
(TX-A
Switch
DOWN)
DS
-961DE
To/From
Site 3
(TX-A
Switch
UP)
DS-
961DE
To/From
Site 1
(TX-A
Switch
DOWN)
DS-
961DE
To/From
Site 2
(TX-A
Switch
DOWN)
Node 1 Node 2 Node 3
Terminal Drop and Insert Terminal
Multiplexer Multiplexer Multiplexer
E1 or Other
Aggregate
Circuit
E1 or Other
Aggregate
Circuit
DI/A DI/B
Figure 6. Example of a Three-Site System Using Drop and Insert
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REMOTE CONTROL INTERFACE
When the RFL DS-961DE module is installed in an IMUX 2000 E1 multiplexer, it can be operated
under local or remote control. When under remote control, most of the module setup parameters can
only be changed through the RS-232 remote port on the shelf Common Module. See the IMUX 2000
manual for information on using the remote control interface.
The remote control interface for the RFL DS-961DE involves two sets of codes: “P” (parameter)
codes, and “S” (status) codes. The RFL DS-961DE reports itself as a “Type 77” module.
“P” CODES
“P” codes, when used in the parameter field of an SCL “SET” command, allow the user to set certain
parameters on the RFL DS-961DE by remote control, just like setting the DIP switches on a module
under local control. “P” codes also appear in the response to a “CONFIG?” query, providing a list of
the RFL DS-961DE’s current parameter settings. A typical RFL DS-961DE response to a “CONFIG?”
query looks like this:
Response: This line means:
* OK
CHANNEL CARD 1, TYPE 77
UNDER REMOTE CONTROL
SRVC = ON
P01 = 93 (B01011101)
P02 = 128 (B10000000)
A valid command was received
The card address is 1, it is a DS-961DE
This module is under remote control
Service is turned on
There are two “P” codes for the DS-961DE, “P1” and “P2”. Each “P” code is displayed as a decimal
number from 0 to 255, followed by an eight-digit binary equivalent in parentheses. The decimal
display is generally more useful for both setting and interpreting most of the “P” codes. For example,
P1 sets the time slot the module will use. To set the module to use time slot 9, issue a SET command in
the format:
<multiplexer address>:<card address>:SET:P1 = 9;
The binary value may be used if desired.

NOTE
When using binary numbers in the parameter field of a SET command, they must be preceded
by the letter "B", as shown in the following example. To set the module to use time slot 9 in
binary, issue this command:
<multiplexer address>:<card address>:SET:P1 = B00001001;
In addition to the “P” codes, it is also possible to turn service on or off for the RFL DS-961DE by
sending one of the following commands in the parameter field of a “SET” command:
SRVC = ON
SRVC = OFF
Table 6 lists the meaning of the “P” codes for this module.
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Table 6. Remote Configuration Settings (P Codes)
P Code Digit(s) and Switch Equivalent Bit Value Description
SRVC SERVICE ON/OFF ON Turns service on (module enabled)
OFF Turns service off (module disabled)
P1a B00000000
---↑↑↑↑↑
TIME SLOT SELECT
1 to 31 These five bits set the desired time slot(s). From left to right, they
correspond to the five time slot select switches as shown in Table 3.
P1b B00000000
--↑-----
0 Set transmit and receive directions: 0 = Set for operation via the DI-B port of a drop/insert multiplexer.
TERM 1 1 = Set for operation in a terminal multiplexer or via the
DI-A port of a drop/insert multiplexer.
P1c B00000000
↑↑------ 0 to 3 Low-speed rate select (inoperative when P2a is set to "0"):
0 = 1200 bps, 1 = 4800 bps, 2 = 2400 bps, 3 = 9600 bps
P2a B00000000
-------↑
0 High-speed rate select: 0 = Sets data rate to 19.2 kbps and deactivates P1c
1 1 = Activates P1c, low-speed rate select
P2b B00000000
------↑-
0 Selects buffers and timing (Note 2): 0 = Buffers out of circuit, module uses internal timing
1 1 = Buffers in circuit, module uses DTE device timing
P2c B00000000
-----↑--
0 Channel 1 clock: 0 = normal
1 1 = inverted (Note 3)
P2d B00000000
----↑---
0 Channel 2 clock: 0 = normal
1 1 = inverted (Note 3)
P2e B00000000
---↑----
0 Channel 3 clock: 0 = normal
1 1 = inverted (Note 3)
P2f B00000000
--↑-----
0 Channel 4 clock: 0 = normal
1 1 = inverted (Note 3)
P2g B00000000
-↑------
0 Channel 5 clock: 0 = normal
1 1 = inverted (Note 3)
P2h B00000000
↑-------
0 Set loopback: 0 = off (Note 4)
1 1 = on
1. These are the only legal values for setting the parameters. Setting any parameter to a value outside its
specified range will produce an unpredictable result.
2. The input buffers must be used when the DTE device timing is in use, so this code sets both of these
conditions.
3. These codes are active only when internal timing is selected (P5 = 0).
4. When the loopback is on, all five receive channels are looped back into the transmitter (used for far end
loopback during end to end testing).

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“S” CODES
“S” codes appear in response to a STATUS? query. There is one S code for the DS-961DE. Like the
"P" codes, it is displayed as both a decimal and an eight-digit binary number. A typical response to a
STATUS? query looks like this:
OK
CHANNEL CARD 1, TYPE 77
UNDER REMOTECONTROL
S01 = 2 (B00000010);
Table 7 lists the meaning of the “S” codes for this module.
Table 7. Remote Configuration Settings (S Codes)
P Code Digit(s) and Switch Equivalent Bit Value Description
S1a B00000000
-------↑0 0 = In frame
1 1 = Out of frame (Note 1)
S1b B00000000
------↑-0 0 = Transmit alarm (Note 2)
1 1 = No transmit alarm
1. When the card is out of frame an ALERT message is displayed.
2. When there is a transmission alarm an ALARM message is displayed.

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TESTING
When the RFL DS-961DE Data Module has been configured and installed, it should be tested for
proper operation before it is put into service.
There are two ways you can do the testing:
1. Local testing using loopback, with the system out of service.
2. End-to-end testing using far end loopback, with the system in service but the channel
being tested taken out of service.
Use the following procedure to test the modules:
1. For loopback testing, set up the multiplexer loopback following the instructions in the section on
System Checkout Procedures in your multiplexer instruction manual.
For end to end testing, set the LOOP switch on the far end system to the ON position.
2. Connect a data error analyzer (Telecommunication Techniques Corp. Fireberd 2000 or
equivalent) to the jack for channel one on the back of the module adapter, using an RJ-11 cable.
3. Check for synchronization on the output signal.
4. Send single errors on the transmit side and check for single errors on the receive side.
5. Run for 30 seconds and confirm that the signal remains error-free. Observe that the “TX FAULT”
LED and the “FRM” LED are not lit.
6. Repeat test on each channel set up for use in the current configuration.
7. If you used end to end testing, return the LOOP switch at the far end to the OFF position. The
system is now operational.
If there is an apparent malfunction during end to end testing, first check that the configuration at the
two ends is identical.
Most problems occur at the common equipment or facility level. Refer to the Troubleshooting section
in your multiplexer instruction manual for system analysis procedures.

NOTICE
The information in this publication is proprietary and confidential to RFL Electronics Inc. No part of this
publication may be reproduced or transmitted, in any form or by any means (electronic, mechanical, photocopy,
recording, or otherwise), or stored in any retrieval system of any nature, unless written permission is given by
RFL Electronics Inc.
This publication has been compiled and checked for accuracy. The information in this publication does not
constitute a warranty of performance. RFL Electronics Inc. reserves the right to revise this publication and make
changes to its contents from time to time. We assume no liability for losses incurred as a result of out-of-date or
incorrect information contained in this publication.
RFL DS-961DE RFL Electronics Inc.
October 15, 2004 20 [phone]
Publication No. ID-9547-16551
Printed in U.S.A.
October 15, 2004
RFL Electronics Inc.
353 Powerville Road
Boonton Township, NJ 07005-9151
Phone: [phone]
Fax:
(
973
)
334-3863