PULSE+ O3-4D1L3 U2 User manual

Practice Section 1631
Issue 4, October 2009
1
Figure 1. O3-4D1L3 U2 Unit
2
1
DS1-1
RS-232
4
3
C
R
A
F
T
DS1
EN
O3-4D1L3
R
X
OC3
UNIT
DS1-4
T
X
DS1-3
DS1-2
U2
UPDATE
1. INTRODUCTION
This practice describes the Pulsecom®O3-4D1L3 U2 OC3 to DS1 Multiplexer, shown in
Figure 1. Installation instructions and engineering references are included.
CONTENTS PAGE
1. INTRODUCTION . . ..................... 1
A. ReasonforReissue.................. 2
B. Description......................... 2
C. Features........................... 3
2. APPLICATIONS. . . ..................... 4
3. FUNCTIONAL DESCRIPTION............. 5
A. OC3Circuitry....................... 5
B. DS1Circuitry....................... 6
C. LocalAlarms....................... 6
4. INSTALLATION........................ 9
A. ControlsandIndicators.............. 10
B. Select and Install Mounting ........... 13
C. MakeAlarmConnections............. 13
D. Install O3-4D1L3 Transceiver and Unit . . 13
E. Make OC3 Connections. ............. 14
F. MakeDS1Connections.............. 15
5. CRAFTPORT ........................ 16
A. Access........................... 16
B. Provisioning....................... 18
C. Manual Loopbacks.................. 20
6. SPECIFICATIONS . .................... 20
7. MAINTENANCE....................... 21
8. CUSTOMERSERVICE................. 22
OC3 TO DS1 MULTIPLEXER
O3-4D1L3 U2
Multiple Patents Pending
Trademarks used in this manual:
AMP and CHAMP are trademarks of AMP Inc.
CLEI is a trademark of Telcordia Technologies, Inc.
Microsoft and Windows are registered trademarks of Microsoft, Inc.
Pulsecom is a registered trademark of Hubbell Inc.
©2009 Pulse Communications Inc. All rights reserved.

O3-4D1L3 U2
1631, Issue 4, October 2009
2
A. Reason for Reissue
This practice has been reissued to update Table 1.
B. Description
The O3-4D1L3 U2 multiplexes/demultiplexes four DS1 signals from an OC3 optical
signal. By using standard, non-proprietary, virtual tributary VT1.5 and synchronous
transport signal STS-1 mapping, the O3-4D1L3 U2 provides fiber-to-fiber compatibility
with synchronous optical network (SONET) multiplexers as well as far-end O3-4D1
Series units.
O3-4D1L3 U2 units do not include optical transceivers. Ordering codes for the
O3-4D1L3 U2 board as well as for available optical transceivers are shown in Table 1.
NOTE
For the remainder of this document, the O3-4D1L3 U2 will be referred to
as the O3-4D1L3.
Table 1. O3-4D1L3 U2 Board and OC3 Transceiver Ordering Codes
Ordering Code CLEITM Code Wave- length
Link
Loss
Budget
Maximum
Output
Level
Maximum
Input
Level Number of Fibers Type of Fiber
A. Board (Without Transceiver)
O3-4D1L3 U2 T1L93L0C — — — — — —
B. Available Optical Transceivers
SFP-OC3-1471-30 SOOTAGGM 1471 nm*
29 dB 0 dBm –8 dBm 2
Single-
Mode
SFP-OC3-1491-30 SOOTAGKM 1491 nm*
SFP-OC3-1511-30 SOOTAGLM 1511 nm*
SFP-OC3-1531-30 SOOTAGMM 1531 nm*
SFP-OC3-1551-30 SOOTAGNM 1551 nm*
SFP-OC3-1571-30 SOOTAGPM 1571 nm*
SFP-OC3-1591-30 SOOTAGRM 1591 nm*
SFP-OC3-1611-30 SOOTAGSM 1611 nm*
SFP-OC3-1310-19 SOOTAGTM 1310 nm 19 dB –8 dBm –7 dBm 2
SFP-OC3-1550-29 SOOTAGUM 1550 nm 29 dB 0 dBm 0 dBm
SFP-OC3-SF13-13 SOOMAB8A 1310 nm 13 dB –8 dBm 0 dBm 1
SFP-OC3-SF15-13 SOOMAB9A 1550 nm
SFP-OC3-MM13-10 SOOTAHMM 1310 nm 10 dB –14 dBm –14 dBm 2 Multi-Mode
*CWDM

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O3-4D1L3 U2
1631, Issue 4, October 2009
C. Features
The O3-4D1L3 provides the following features:
•Supports Universal and, by virtue of VT1.5 OC3 mapping, Integrated network
topologies
•Occupies just two card slots in Type 3192 mechanics shelves—ideal for use in existing
remote terminals (RTs) or central offices (COs)
•DS1 numbers 1, 2, 3, and 4 mapped into STS-1 VT1.5 #1 positions 1, 2, 3, and 4,
respectively
•Available Type 400 mechanics version (O3-4D1) suitable for placement at subscriber
sites
•Climate hardened
•DS1 lightning protection and –48 VDC power input surge protection to help assure
reliable service delivery for units installed at cell sites or in other harsh environments
•Plug-and-play default DS1 provisioning [short loops, bipolar with 8-zero substitution
(B8ZS) and extended superframe (ESF)] and simple front-panel switches that enable or
disable each of the four DS1 ports to eliminate the need to use the craft port for most
applications
•DS1 line build-out provisioning for 0 to 655 feet as well as 0 dB, 7.5 dB, and 15 dB
•Support for ESF data link and craft port loopback commands
•DS1 superframe (SF), ESF, and unframed operation support
•Instant Default feature that permits restoring all settings to their default state without
theneedtousethecraftport
•Utilizes Pulsecom patent-pending “Optionless SONET” technology to eliminate OC3
provisioning
•Designed to accept OC3 small form-factor pluggable (SFP) 1310 nm, 1550 nm, and
coarse wave division multiplexing (CWDM) transceivers
•Standard female 24-pin AMPTM CHAMPTM front-panel DS1 connector
•Standard DB-9 RS-232 craft port front-panel jack (9600 baud, 8-bit bytes, no parity, and
one stop bit) to access performance information and advanced provisioning capabilities
•Simple front-panel indicators for OC3, UNIT, and DS1 operating status
•Alarms that activate alarm indication signal (AIS) and DC contact closures to provide
end-to-end sectionalization
•Fiber attenuators not required to perform an optical loopback with a fiber jumper when
using the SFP-OC3-1310-19 transceiver
•Side-by-side mounting compatible with Pulsecom O3D3-1310L3 and O3D3-1550ERL3
units to support DS1 and DS3 services
•Craft port display of optical transceiver wavelength and link loss budget

O3-4D1L3 U2
1631, Issue 4, October 2009
4
2. APPLICATIONS
Figure 2 shows typical O3-4D1L3 applications.
A. Universal Configuration Providing Cell Site Lightning Protection
With Type 3192 O3-4D1L3 and Type 400 O3-4D1 Units
B. Upgrading Copper High-Bit-Rate Digital Subscriber Line (HDSL) Facilities to Fiber
With Type 3192 O3-4D1L3 and Type 400 O3-4D1 Units
Figure 2. O3-4D1L3 Typical Applications
SONET Mux
D
S
X
O3-
4
D1
D
S
X
O3-
4
D1
D
S
X
O3-
4
D1
Provider #1
Provider #2
Provider #3
O3-
4
D1L3
O3-
4
D1L3
O3-
4
D1L3
3192
RT
Subscriber(s)
SONET Mux
O3-
4
D1
DSL
DSL
DSL
DSL
DSL
DSL
DSL
DSL
DSL Copper-Based
DS1 Services
O3-4D1 Fiber-Based
DS1 Services
3192
RT
Subscriber
O3-
4
D1L3

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O3-4D1L3 U2
1631, Issue 4, October 2009
3. FUNCTIONAL DESCRIPTION
Up to four DS1 circuits are combined into a single OC3 signal by using VT1.5 and STS-1
mapping; DS1 numbers 1, 2, 3, and 4 are mapped into STS-1 VT1.5 #1 positions 1, 2, 3,
and 4, respectively. The DS1 payload is not modified. Figure 3 shows a functional block
diagram.
A. OC3 Circuitry
The optical interface for the 155 Mbps data stream conforms to the basic SONET structure
defined in GR-253-CORE.
Figure 3. O3-4D1L3 Functional Block Diagram
Surge
Protection
Power
Converter
--48 VDC
Input
CPU
EEPROM
RS-232
Driver DB9
LEDs
DIP Switch
OC3 Framer
VT1.5 Mapper
T1 Framer
OC3
LC
DS1
24-Pin
T1
LIU
Transformers
Surge
Protection
Frame Ground
Alarm
Relays
Instant
Default
Switch

O3-4D1L3 U2
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6
B. DS1 Circuitry
Each DS1 is provisioned for alternate mark inversion (AMI) or B8ZS line coding.
Superframe, extended superframe, or unframed formats are supported. Each DS1 pulse
template meets ANSI T1.102.
Each DS1 port is provisioned for digital signal cross-connect (DSX-1) type interface
(short haul), with line build-outs (LBOs) appropriate to service line lengths from 0 to
655 feet as well as 0, 7.5, or 15 dB.
The O3-4D1L3 detects loss of signal, all ones (alarm indication signal), and line code
violations for each DS1 on the DS1 side.
The unit is factory-set to enable a 24-minute loopback timeout for the four DS1 lines. The
craft port can be used to selectively inhibit loopback as well as loopback timeout on a
per-DS1 basis. See Section 5, CRAFT PORT, for additional DS1 loopback information.
C. Local Alarms
Tables 2, 3, and 4 provide alarm information for a universal configuration as well as an
O3-4D1L3 connected to a representative higher-order multiplexer (such as the Lucent
DMXtend). See Figures 4 and 5.
Table 2. O3-4D1L3 Alarm Contact Definitions
Lead Pin Alarm Indication
Tip
Ring K 9OC3 alarm relay contact closure between these leads indi-
cates an OC3 alarm.
Tip1
Ring1 F 6DS1 alarm relay contact closure between these leads indi-
cates a DS1 alarm.
NOTE: Simultaneous T/R and T1/R1 contact closures indicate internal unit failure or loss
of OC3/DS1 power.

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O3-4D1L3 U2
1631, Issue 4, October 2009
Table 3. System Alarm Behavior:
Pulsecom O3-4D1L3 to Pulsecom O3-4D1 Configuration
Alarm Stimulus System A Response System B Response
System A DS1-1 LOS DS1-1 LED (red) / DS1 alarm relay / TX AIS
upstream / DS1-1 LOS alarm in craft port DS1 LED (yellow) / DS1-1 drop AIS / DS1-1 AIS (FE) alarm in craft port
System A DS1-2 LOS DS1-2 LED (red) / DS1 alarm relay / TX AIS
upstream / DS1-2 LOS alarm in craft port DS1 LED (yellow) / DS1-2 drop AIS / DS1-2 AIS (FE) alarm in craft port
System A DS1-3 LOS DS1-3 LED (red) / DS1 alarm relay / TX AIS
upstream / DS1-3 LOS alarm in craft port DS1 LED (yellow) / DS1-3 drop AIS / DS1-3 AIS (FE) alarm in craft port
System A DS1-4 LOS DS1-4 LED (red) / DS1 alarm relay / TX AIS
upstream / DS1-4 LOS alarm in craft port DS1 LED (yellow) / DS1-4 drop AIS / DS1-4 AIS (FE) alarm in craft port
System B DS1-1 LOS DS1-1 LED (yellow) / DS1-1 drop AIS /
DS1-1 AIS (FE) alarm in craft port DS1 LED (red) / DS1 alarm relay / TX AIS upstream / DS1-1 LOS alarm in craft port
System B DS1-2 LOS DS1-2 LED (yellow) / DS1-2 drop AIS /
DS1-2 AIS (FE) alarm in craft port DS1 LED (red) / DS1 alarm relay / TX AIS upstream / DS1-2 LOS alarm in craft port
System B DS1-3 LOS DS1-3 LED (yellow) / DS1-3 drop AIS /
DS1-3 AIS (FE) alarm in craft port DS1 LED (red) / DS1 alarm relay / TX AIS upstream / DS1-3 LOS alarm in craft port
System B DS1-4 LOS DS1-4 LED (yellow) / DS1-4 drop AIS /
DS1-4 AIS (FE) alarm in craft port DS1 LED (red) / DS1 alarm relay / TX AIS upstream / DS1-4 LOS alarm in craft port
System A OC3 LOS OC3 LED (red) / DS1 LED (yellow) / DS1
drop AIS on all ports / TX upstream RDI_L,
RDI_P, and RDI_V / OC3 alarm relay closure
/ OC3 LOS and DS1 AIS (NE) alarms on all
ports in craft port
OC3 LED (yellow) / OC3 RDI_L alarm in
craft port / no impact on drop DS1 signaling
System B OC3 LOS OC3 LED (yellow) / OC3 RDI_L alarm in craft
port / no impact on drop DS1 signaling OC3 LED (red) / DS1 LED (yellow) / DS1 drop AIS on all ports / TX upstream RDI_L,
RDI_P, and RDI_V / OC3 alarm relay
closure / OC3 LOS and DS1 AIS (NE)
alarms on all ports in craft port
System A Incorrect Framing
Format at DS1 Interface DS1-n LED (red) / DS1 relay closure / DS1-n LOF (NE) alarm in craft port DS1 LED (yellow) / DS1-n LOF (FE) alarm in craft port / framing errors at DS1 drop
side interface
System B Incorrect Framing
Format at DS1 Interface DS1-n LED (yellow) / DS1-n LOF (FE) alarm in craft port / framing errors at DS1 drop side
interface
DS1 LED (red) / DS1 relay closure / DS1-n
LOF (NE) alarm in craft port
NOTE: FE = Far End. LED = Light Emitting Diode. LOF = Loss of Frame. LOS = Loss of Signal. NE = Near End.
RDI = Remote Defect Indication. RX = Receive. TX = Transmit.
Figure 4. O3-4D1L3 to O3-4D1 Reference Circuit Configuration
O3-4D1O3-4D1L3
SYSTEM BSYSTEM A
DS1 #1
DS1 #2
DS1 #3
DS1 #4
DS1 #1
DS1 #2
DS1 #3
DS1 #4

O3-4D1L3 U2
1631, Issue 4, October 2009
8
Table 4. System Alarm Behavior:
Pulsecom O3-4D1L3 to Lucent DMXtend Configuration
Alarm Stimulus System A Response System B Response
System A DS1-1 LOS DS1 LED (red) / DS1 alarm relay / TX AIS
upstream / DS1-1 LOS alarm in craft port DS1-1dropAIS
System A DS1-2 LOS DS1 LED (red) / DS1 alarm relay / TX AIS
upstream / DS1-2 LOS alarm in craft port DS1-2dropAIS
System A DS1-3 LOS DS1 LED (red) / DS1 alarm relay / TX AIS
upstream / DS1-3 LOS alarm in craft port DS1-3dropAIS
System A DS1-4 LOS DS1 LED (red) / DS1 alarm relay / TX AIS
upstream / DS1-4 LOS alarm in craft port DS1-4dropAIS
System B DS1-1 LOS DS1 LED (yellow) / DS1-1 drop AIS / DS1-1
AIS (FE) alarm in craft port DS1 LED (red) / TX DS1-1 AIS upstream
System B DS1-2 LOS DS1 LED (yellow) / DS1-2 drop AIS / DS1-2
AIS (FE) alarm in craft port DS1 LED (red) / TX DS1-2 AIS upstream
System B DS1-3 LOS DS1 LED (yellow) / DS1-3 drop AIS / DS1-3
AIS (FE) alarm in craft port DS1 LED (red) / TX DS1-3 AIS upstream
System B DS1-4 LOS DS1 LED (yellow) / DS1-4 drop AIS / DS1-4
AIS (FE) alarm in craft port DS1 LED (red) / TX DS1-4 AIS upstream
System A OC3 LOS OC3 LED (red) / DS1 LED (yellow) / DS1
drop AIS on all ports / TX upstream RDI_L,
RDI_P, and RDI_V / OC3 alarm relay
closure / OC3 LOS and DS1 AIS (FE)
alarms on all ports in craft port
Minor alarm (RDI_L) configurable / RDI_P
and RDI_V defects detected
System B OC3 LOS OC3 LED (yellow) / OC3 RDI_L alarm in
craft port / no impact on drop DS1 signaling Critical system alarm / VT AIS alarm on all VTs / drop AIS alarm on all DS1s
Figure 5. O3-4D1L3 to DMXtend Reference Circuit Configuration
DMXtendO3-4D1L3
SYSTEM BSYSTEM A
DS1 #1
DS1 #2
DS1 #3
DS1 #4
DS1 #1
DS1 #2
DS1 #3
DS1 #4

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O3-4D1L3 U2
1631, Issue 4, October 2009
4. INSTALLATION
DANGER
The O3-4D1L3 employs Class 1 laser products. To avoid injury, do not
look directlyinto the optical transceiver or into the fiber cable. Note that
the light is invisible;the optical signal cannot be detected bythe eye.
WARNINGS
1. This unit includes components that are susceptible to damage from
static electricity.DONOT handle units without protection from
electrostatic discharge.
2. When not in use, optical connectors must be covered bydust capsto
keepairborne particles off connecting surfaces and to preserve
optimum performance.
3. Always clean fiber plugs with an approved fiber-cleaning product,
following appropriate procedures, before plugging the fiber into the
O3-4D1L3.
4. O3-4D1L3 units can be equipped with long-range transceivers which
produce a higher optical output than the receiver can tolerate. This
capabilityis intended for applications where long lengths of fiber will
attenuate the signal. If a long-range transceiver is used in an
application withshort fibers, a 15dBattenuator should be installed on
the transmit port to prevent bit errors and possible damage to the
receiver.
5. When connecting the O3-4D1L3 output to test equipment, verifythat
the maximum input level specification of the test equipment is not
exceeded bythe O3-4D1L3 output. Even intermediate-range optics
can produce levels too high for some test equipment, so attenuators
might be required. In general, when connecting the O3-4D1L3 to test
equipment, Pulsecom recommends a 5dBattenuator when
intermediate-range optics are installed in the O3-4D1L3 and a 15dB
attenuator when long-range optics are installed in the O3-4D1L3.
Check the specifications of the test equipment to determine if this
precaution is adequate or necessary.
The O3-4D1L3 complies with Part 15 of the Federal Communications Commission (FCC)
rules when used in the recommended mountings and installed as described in this manual.
Operation is subject to the following two conditions:
1) This device may not cause harmful interference, and
2) This device must accept any interference received, including interference that may
cause undesired operation.

O3-4D1L3 U2
1631, Issue 4, October 2009
10
A. Controls and Indicators
Front Panel
The front panel of the O3-4D1L3 provides connection to the OC3 and DS1 signals as well
as the craft port. LEDs show OC3, DS1, and UNIT status. A 4-position DIP switch
enables or disables each DS1. Front-panel connectors and indicators are shown in Figure 1
and described in Table 5.
The DS1 connector has four transmit pairs and four receive pairs; front-panel DS1 pin-
outs are listed in Table 6. Shielded cables are available from Pulsecom: Order
AMP-MSL/U24Sxxx, where xxx is the cable length in feet. This cable has a male
screw-lock connector at one end and is unterminated (stub) at the other end. See Practice
Section 1636 for cable installation instructions.
Table 5. O3-4D1L3 Front-Panel Connectors and Indicators
Connector Function
DS1 24-position, female, AMP CHAMP connector with four DS1 (1-4) interfaces;it is
recommended that the mating cable be equipped with a vertical screw-lock
hood (see NOTE below).
RX OC3 input (receive) LC optical connector.
TX OC3 output (transmit) LC optical connector.
CRAFT
RS-232 DB-9 female port for access to PC running HyperTerminal or other VT-100 emulation program.
Switch Function
EN
1, 2, 3, 4 Selects Enable or Disable operation for each DS1 interface.
Indicator Function
UNIT Lights green to show normal unit operation.
Lights red to show unit/configuration failure or no SFP optical module installed.
OC3 Lights green to show that the OC3 signal is connected and operating properly.
Lights red to show loss of signal, loss of framing, loss of pointer, out of frame, or
optical degradation condition;also shows SFP optical module failure or
non-OC3 transceiver installed.
Lights yellow to show far-end trouble for the associated OC3.
Turns OFF to show no SFP optical module installed.
DS1-1
DS1-2
DS1-3
DS1-4
Lights green to show that a DS1 is operating properly.
Flashes green to show that a DS1 loopback has been activated.
Lights red to show a DS1 loss of signal, if enabled.
Lightsyellow to show that a DS1 alarm indication signal (unframed all ones) has
been detected.
Turns OFF to show that a DS1 port is disabled.
NOTE: Order the Pulsecom screw-lock to unterminated cable, AMP-MSL/U24Sxxx, where xxx =
cable length in feet;screw-lock hardware is provided.

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O3-4D1L3 U2
1631, Issue 4, October 2009
The front-panel female DB-9 communications interface is an asynchronous VT-100 serial
port. This craft port operates at 9600 baud with 8 bits of data, no parity, no flow control,
and 1 stop bit. Refer to Section 5 for detailed craft port instructions.
Backplane
Backplane pinouts for alarm contacts, power, and ground (GND) are listed in Table 7.
Printed Circuit Board
When the local DS1 provisioning needs to be restored to the factory defaults, the instant
default feature can be used. Unplugging the card, changing the position of switch S1-1,
and plugging the card back in returns all parameters to their default values. Note that the
initial position of S1-1 is not important; the O3-4D1L3 detects a change in the position of
S1-1 during power-up as an instruction to restore parameters to their default values.
Switch positions S1-2, S1-3, and S1-4 are not used. See Figure 6.
Table 6. Front-Panel DS1 Connector Pin Assignments
Pin Signal Pin Signal
1 Ring1 DS1-1 13 Tip1 DS1-1
2 Ring1 DS1-2 14 Tip1 DS1-2
3 Ring1 DS1-3 15 Tip1 DS1-3
4 Ring1 DS1-4 16 Tip1 DS1-4
5 Shield 17 —
6—18—
7 Ring DS1-1 19 Tip DS1-1
8 Ring DS1-2 20 Tip DS1-2
9 Ring DS1-3 21 Tip DS1-3
10 Ring DS1-4 22 Tip DS1-4
11 Shield 23 —
12 — 24 —
NOTE: Tip/Ring = Signals received from the OC3
fiber link (DS1 TX).
Tip1/Ring1 = Signals transmitted into the OC3
fiber link (DS1 RX).
TIP
RING1 TIP1
RING
1
12
2
3
4
5
6
7
10
11
9
8
24
13
16
18
21
20
23
19
22
14
15
17
SHIELD
SHIELD

O3-4D1L3 U2
1631, Issue 4, October 2009
12
Table 7. Backplane Pin Assignments
Connec-
tion Pin Function Descrip- tion
OC3
Alarm K Tip Dry Contact
9 Ring Dry Contact
DS1
Alarm F Tip1 Dry Contact
6 Ring1 Dry Contact
Power 8 –48 VDC IN
5 –48V Return IN
Ground JFrame GND IN
Figure 6. Switch Positions on the O3-4D1L3
RING1 DS1 ALM
A1
B2
C3
D4
6
H7
J8
K9
L10
E5
F
REAR VIEW
CARD-EDGE CONNECTOR
RING OC3 ALMTIP OC3 ALM
-48V
-48V RET
TIP1 DS1 ALM
FRAME GND
S1
1

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O3-4D1L3 U2
1631, Issue 4, October 2009
B. Select and Install Mounting
The O3-4D1L3is designed to be plugged into Type 3192 shelves, including those installed
in RT cabinets according to normal practices. The unit occupies two card slots.
Follow the manufacturer’s detailed instructions for mounting the shelf and making power
connections.
C. Make Alarm Connections
Each O3-4D1L3 module uses two DC contact closures as well as an alarm pin and a fuse
pin to identify failures. Follow the steps in Procedure 1 to make these optional alarm
connections.
D. Install O3-4D1L3 Transceiver and Unit
Follow the steps in Procedure 2 to install the O3-4D1L3 transceiver and module.
Procedure 1. Making Optional Alarm Connections
STEP ACTION
1 Wire local OC3 alarms to backplane connector pins K and 9 (Tip and Ring).
2 Wire local DS1 alarms to backplane connector pins F and 6 (Tip1 and Ring1).
Procedure 2. Installing the O3-4D1L3 Transceiver and Module
STEP ACTION
1 Carefully plug the desired SFP transceiver (see Table 1) into its front-panel
socket. Ensure that it snapped into place.
2 Plug an O3-4D1L3 into a 3192 card slot; the module is two slots wide.
3 Verify that the front-panel UNIT indicator is green.
•If the UNIT indicator does not turn on, verify that power is connected to
the mounting and that a good fuse is properly installed.
•If the UNIT indicator is red, verify that the laser transceiver is properly
latched into its socket. If the indicator remains red, the O3-4D1L3 module
is defective and should be replaced.

O3-4D1L3 U2
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14
E. Make OC3 Connections
O3-4D1L3 modules have LC optical connectors. Follow the steps in Procedure 3 to make
OC3 connections.
DANGER
Units employClass 1 laser products. To avoid injury, do not look directly
into the optical transceiver or into the fiber cable. Note that the light is
invisible;the optical signal cannot be detected bythe eye.
Procedure 3. Making OC3 Connections
STEP ACTION
1Beforeplugging in the OC3 fiber, verify that the O3-4D1L3 front-panel OC3
indicator is red. If the shelf is properly powered and the OC3 indicator is off
or green when no fiber cables are connected, the unit is defective and should
be replaced.
2 Remove the protective dust cover from the front-panel OC3 LC jack labeled
RX/TX.
3 Plug in the OC3 fiber cable.
4 If the far-end OC3 connection has already been made, the OC3 indicator
should turn green or, if there is a far-end trouble, turn solid yellow.
If the OC3 indicator remains red:
•Verify that the correct laser transceiver is properly latched into the OC3
socket.
•Verify that fiber cables are in good condition and that fiber connectors are
clean. If required, clean the connectors with special lint-free pads in
accordance with standard procedures.
•Verify that the optical path loss does not exceed the capabilities of the
far-end laser. If so, replace the far-end unit with one designed to support
longer OC3 fiber links.
•If the OC3 indicator remains red, the O3-4D1L3 module is defective and
should be replaced.

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O3-4D1L3 U2
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F. Make DS1 Connections
The O3-4D1L3 module has a female AMP CHAMP front-panel connector that is designed
to be used with a screw-lock connector hood. Pulsecom cable AMP-MSL/U24Sxxx
should be used. See Table 6, Procedure 4, and Figure 1.
Procedure 4. Making DS1 Connections
STEP ACTION
1Beforeplugging in theDS1 cable, activate the DS1 circuits that are to be used
(1, 2, 3, and/or 4) by setting the appropriate front-panel switch(es) to the EN
(enable) position.
2 Verify that the DS1 indicators are red. If a DS1 indicator is off, yellow, or
green, the unit is defective and should be replaced.
3 If the Pulsecom AMP-MSL/U24Sxxx assembly is used, refer to Practice
Section 1636.
4 If the far-end DS1 cable connection has already been made to an active DS1
device, the DS1 LED for each active DS1 should turn green or, if there is a
far-end trouble, turn solid yellow. If the DS1 indicator remains red:
•Verify that the cable is in good condition.
•Verify that the cable length does not exceed 655 feet.
•If the cable length is greater than 133 feet, a PC running HyperTerminal
and an RS-232 cable must be used to provision the cable length. Refer to
Section 5 of this practice.
•Verify that the DS1 equipment at the far end of the DS1 cable is operating
properly.
•If the DS1 indicator remains red, the O3-4D1L3 module is defective and
should be replaced.

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5. CRAFT PORT
A. Access
The O3-4D1L3 is equipped with a CRAFT RS-232 port with VT-100 emulation. See
Figure 7 for port pin assignments.
System Requirements
The following items are required for performance monitoring:
•486 PC or better computer with 24 Mbytes minimum of RAM
•Microsoft®Windows®95 or higher
•HyperTerminal or compatible VT-100 terminal emulation program
•Windows-compatible mouse pointing device
•An available communication (COM) port
•RS-232 standard communications cable
Figure 7. CRAFT RS-232 Port Pin Assignments
1
2
3
4
5
9
8
7
6
Tx
Rx

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Running the Terminal Emulation Software
Follow the steps in Procedure 5 to run the terminal emulation software on your PC.
Procedure 5. Running Terminal Emulation Software
STEP ACTION
1 Connect the RS-232 communications cable from the COM1 (or any other
available COM) port on the PC to the DB-9 female connector on the
O3-4D1L3 front panel.
2 Start Windows (XP setup is described below).
3 From the Windows Start menu, choose All Programs•Accessories•
Communications•HyperTerminal (or equivalent terminal emulation program).
4 If desired, click the Yes button in the Default Telnet Program? dialog box to
select HyperTerminal as your default telnet program.
5 At the ‘Name:’ prompt in the Connection Description dialog box, type
O3-4D1L3. Then select an icon that you wish to represent the O3-4D1L3 to
simplify future access. Next click the OK button to display the Connect To
dialog box.
6 At the ‘Connect using:’ prompt, select “COM1” (or other appropriate port
number, as chosen in Step 1) from the pull-down menu.
7 Click the OK button to display the COM1 Properties dialog box. Using the
pull-down menus, select the following parameters:
A) “9600” bits per second
B) “8” data bits
C) “None” parity
D) “1” stop bit
E) “None” flow control
8 Click the OK button.
9FromtheFile
•Properties menu, choose the Settings tab to select the following
parameters:
A) At the ‘Function, arrow, and ctrl keys act as’ prompt, select “Terminal
keys.”
B) At the ‘Emulation’ prompt, select “VT100” from the pull-down menu.
10 Click the OK button and then hit the ENTER key to access login.

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Login
If necessary, press the ENTER key to view the Login screen. The system asks for a user
name and password for authentication. Follow the steps in Procedure 6.
NOTE
User Name and Password are preset. Both responses are case-sensitive;
use lower-case letters only.
Root (admin access) can view and modify all values. After passing authentication, users
login to the Main Menu.
B. Provisioning
Provisioning is performed via the Configuration Manager sub-menu. Table 8 shows
provisionable features and factory-set default settings.
Procedure 6. Logging In
STEP ACTION
1 At the ‘User Name:’ prompt, type root. Then hit the ENTER key.
2 At the ‘Password:’ prompt, type root. Then hit the ENTER key.
Table 8. O3-4D1L3 Provisioning
Feature Option Default
A. DS1 Provisioning
Name Permits assigning a 12-character name to each DS1 DS1 #
(1,2,3,4)
Framing Format Superframe, extended superframe, or unframed ESF
Line Coding Alternate mark inversion or bipolar with 8-zero substitution B8ZS
Line Build-Out 0–133 ft., 133–266 ft., 266–399 ft., 399–532 ft., 532–655 ft., OR
0, 7.5, or 15 dB 0 to 133 feet
DS1 Loopback Enable or disable Disable
DS1 Loopback Timeout 1, 2, 4, 8, 24 minutes, or none (no timeout on manual loopback) 24 minutes
Response to DS1 Loss of
Signal Send AIS to network (fiber), initiate loopback, or no action Send AIS to network
B. OC3 Provisioning
Response to OC3 Loss of
Signal Send AIS to DS1. Turn off DS1 transmitter. Send AIS to DS1
C. Unit Provisioning
Unit Type NT (customer-premises equipment) or LT (central office) side of
network LT

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The O3-4D1L3 can recognize in-band and ESF data link loopback codes as shown in
Figure 8.
To respond to DS1 loopbacks, the O3-4D1L3 must be provisioned as an NT (CPE-side)
unit (LT is default), have its loopbacks enabled (disabled is default), and be provisioned
for either ESF (default) or SF operation. When provisioned for NT and ESF operation, the
O3-4D1L3 will respond to either in-band or ESF data link (out-of-band) loopback codes;
when provisioned for NT and SF operation, the unit will only respond to in-band loopback
codes. See Table 9.
Figure 8. DS1 Loopbacks
Table 9. Loopback Requests
A. SF Configuration
In-Band Loopback Code Binary
Activate (Network) 11000 (2 in 5)
Deactivate (Network) 11100 (3 in 5)
AIS (Deactivate) All Ones
B. ESF Configuration
In-Band Loopback Code Binary
Activate (Network) 11000 (2 in 5)
Deactivate (Network) 11100 (3 in 5)
AIS (Deactivate) All Ones
ESF Data Link Loopback Code Binary
Activate (Line) 00001110 11111111
Deactivate (Line) 00111000 11111111
Universal Deactivate 00100100 11111111
AIS (Deactivate) All Ones
DS1 Loopback
OC3 DS1
Side
O3-4D1L3

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During a loopback, an alarm indication signal is sent to the DS1 Tip1/Ring1 (receive) pair.
However, if the unit receives (from the OC3 fiber link) an AIS signal in the DS1 circuit
being looped back, the O3-4D1L3 loopback will be deactivated to prevent the AIS from
being transmitted back into the OC3 fiber link. The deactivation helps isolate the fault that
caused the AIS.
If provisioned as an LT (CO-side) unit, the O3-4D1L3 automatically disables loopback
detection. Loopbacks can be enabled on any or all DS1s in a unit provisioned for NT via
the craft port loopback enable screen.
C. Manual Loopbacks
Three types of manual loopback are available for use via the craft port. These loopbacks
can be accessed via the Maintenance Manager sub-menu:
•Network (toward optical interface)
•Customer (toward DS1 interface)
•Bilateral (toward optical and DS1 interfaces)
6. SPECIFICATIONS
Table 10 lists the electrical and physical characteristics of the unit.
Table 10. O3-4D1L3 Specifications
Description Specification
A. System Characteristics
Loopback Remote in-band/out-of-band DS1 loopbacks;
Local (manual) loopbacks
B. OC3 Interface
Optical Bit Rate 155.52 MHz,±20 ppm
Optical Wavelength 1310, 1550, 1471, 1491, 1511, 1531, 1551,
1571, 1591, and 1611 nm
Optical Input Level See Table 1
Optical Link Loss Budget See Table 1
Optical Receive Monitoring Loss Of Signal, Loss Of Frame, Alarm
Indication Signal, Remote Defect Indication
FDA Laser Classification Class 1
Optical Connectors DuplexLC snap-in