Black Box MT1100C User manual

JULY 2003
MT1100A MT1100A-DC
MT1100C MT1101A
MT1101A-DC MT1102A
MT1102A-DC MT1102C
CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
E1/T1 Rate Converters

i
Contents
Chapter 1. Introduction
1.1 Overview..................................................................................................................... 1-1
Versions................................................................................................................................1-1
Application ...........................................................................................................................1-1
1.2 Functional Description................................................................................................. 1-2
Functional Block Diagram .....................................................................................................1-2
Timing Reference..................................................................................................................1-2
Diagnostics ...........................................................................................................................1-2
1.3 Technical Specifications............................................................................................... 1-3
Chapter 2. Installation and Setup
2.1 Site Requirements and Prerequisites ............................................................................ 2-1
2.2 Package Contents ........................................................................................................ 2-1
2.3 Configuring Standalone Unit........................................................................................ 2-2
Setting the Jumpers...............................................................................................................2-2
Connecting the Interfaces .....................................................................................................2-5
Connecting the Power ..........................................................................................................2-5
Chapter 3. Operation
3.1 Front Panel Indicators .................................................................................................. 3-1
3.2 Operating Instructions ................................................................................................. 3-2
Turning On...........................................................................................................................3-2
Operating the Unit ...............................................................................................................3-2
Turning Off...........................................................................................................................3-2
Chapter 4. Troubleshooting and Diagnostics
4.1 Performing Local Analog Loopback.............................................................................. 4-1
Activating Local Analog Loopback .........................................................................................4-1
Deactivating Local Analog Loopback .....................................................................................4-2
4.2 Troubleshooting........................................................................................................... 4-2
Chapter 5. MT1100C, MT1102C Cards
5.1 Rack Nest 2/14 Card Cage ........................................................................................... 5-1
Line Connector.....................................................................................................................5-1
DTE Connector.....................................................................................................................5-1
5.2 Power Supply .............................................................................................................. 5-2
AC Supply ............................................................................................................................5-2
DC Supply............................................................................................................................5-2
Power Supply with Redundancy............................................................................................5-2
5.3 Front Panel .................................................................................................................. 5-3
5.4 Installing MT1100C, MT1102C.................................................................................... 5-5
Setting Internal Jumpers and Switches ...................................................................................5-5
Installing MT1100C, MT1102C into the Rack Nest 2/14 Card Cage .......................................5-6
Connecting the Interfaces .....................................................................................................5-6
Appendix A. Interface Connector Wiring

Table of Contents
ii
List of Figures
1-1. Typical Application................................................................................................................ 1-1
1-2. Block Diagram, E1 Converter................................................................................................. 1-2
1-3. Block Diagram, T1 Converter ................................................................................................ 1-2
2-1. Jumper Locations, E1 Converter ............................................................................................2-3
2-2. Jumper Locations, T1 Converter ............................................................................................2-3
3-1. E1 Converter Front Panel....................................................................................................... 3-1
3-1. T1 Converter Front Panel ...................................................................................................... 3-1
4-1. Running Local Loopback ....................................................................................................... 4-1
5-2. MT1100C, MT1102C Front Panels ........................................................................................ 5-3
5-5. Rack Nest 2/14 Front Panel ................................................................................................... 5-4
5-6. PCB Layout ........................................................................................................................... 5-5
List of Tables
2-1. Jumper Settings, E1 Converter ............................................................................................... 2-4
2-2. Jumper Settings, T1 Converter ............................................................................................... 2-4
3-1. Front Panel LED Indicators .................................................................................................... 3-1
4-1. Troubleshooting .................................................................................................................... 4-2
5-1. Jumper Settings ..................................................................................................................... 5-5

Overview 1-1
Chapter 1
Introduction
1.1 Overview
MT1100A, MT1100A-DC, MT1100C, MT1101A, MT1101A-DC, MT1102A,
MT1102A-DC, MT1102C are interface converters. They convert unframed HDB3,
AMI or B8ZS data of ITU G.703 E1/T1 balanced or unbalanced interface into a
V.35 or RS-530 DTE interface.
The units operate at 1544 kbps or 2048 kbps. It extracts data and the clock from
the G.703 interface via a jitter attenuator to meet ITU G.823 requirements.
RIC-E1 acts as a line transceiver. It provides protection from over-voltage and
over-current stress caused by lightning, power crosses and other noise sources.
Versions
The following versions of the converters are available:
• MT1100A – standalone T1 to V.35 converter, AC power supply
• MT1100A-DC – standalone T1 to V.35 converter, DC (-48 VDC) power supply
• MT1100C – converter card for Rack Nest 2/14 modem nest, T1 to V.35
• MT1102A – standalone T1 to RS-530 converter, AC power supply
• MT1102A-DC – standalone T1 to RS-530 converter, DC (-48 VDC) power
supply
• MT1102C – converter card for Rack Nest 2/14 modem nest, T1 to RS-530
• MT1101A – standalone E1 to V.35 converter, AC power supply
• MT1101A-DC – standalone E1 to V.35 converter, DC (-48 VDC) power supply.
Application
Converters are typically used to connect between a G.703 network and a DTE.
The DTE can be a multiplexer, a bridge, a router etc. Figure 1-1 illustrates a typical
application.
DTE
V.35 or RS-530
MT1100A, MT110 0A-DC,
MT1101A, MT110 1A-DC,
MT1102A or MT1102A-DC,
E1 or T1
Network
Figure 1-1. Typical Application

Chapter 1 Introduction
1-2 Functional Description
1.2 Functional Description
Functional Block Diagram
Figure 1-2 shows the functional block diagram of MT1101A and MT1101A-DC.
Txd
Rxclk
Interchangable Interfaces
Rxd
Txclk
Loss
Ts t
Ana
LIU
X
Transformers
Clock
Gen.
BNC
Unbalanced
Balanced
Unbalanced
BNC
RJ - 45
P. S .
Select
IMP
Tx & Rx Code
AMI
HDB3
Figure 1-2. Block Diagram, E1 Converter
Figure 1-2 shows the functional block diagram of MT1100A, MT1100A-DC,
MT1100C, MT1102A, MT1102A-DC, and MT1102C.
Txd
Rxclk
Interchangable Interfaces
Rxd
Txclk
Loss
Tst
Ana
LIU
X
Transformers
Clock GEN.
Tx & Rx Code
RJ - 45
P. S .
AMI
B8ZS
Figure 1-3. Block Diagram, T1 Converter
Timing Reference
Converters support three clock modes:
• Internal, derived from its internal oscillator
• External, supplied by the attached DTE
• Receive, recovered from the received line signal.
Diagnostics
Converters support a V.54 (loop 3) local loopback activated by the internal jumper
of the standalone unit, front panel pushbutton of the rack card or via
corresponding pin of the DTE interface connector. For more information, refer to
Chapter 4.

Chapter 1 Introduction
Technical Specifications 1-3
1.3 Technical Specifications
E1 Interface Coding HDB3 or AMI
Framing Unframed
Bit Rate 2.048 Mbps
Impedance 120Ω, balanced
75Ω, unbalanced
RCV Signal Level 0 to -10 dB
XMT Signal Level 3V (±10%), balanced
2.37V (±10%), unbalanced
Connectors RJ-45, 8-pin, balanced
Two BNC coaxial, unbalanced
Return Loss Better than 15 dB
T1 Interface Coding B8ZS, AMI
Framing Unframed
Bit Rate 1.544 Mbps
Impedance 100Ω, balanced
RCV Signal Level 0 to -10 dB
XMT Signal Level 3V (±10%), balanced
Connector RJ-45, 8-pin, balanced
Return Loss Better than 15 dB
DTE Interface Type • V.35: 34-pin, female
• RS-530: 25-pin, D-type female
Control Signals • CTS follows RTS
• DCD follows E1 state
• DSR is constantly ON
Timing Derived from three alternative sources:
• Internal oscillator
• External, from the attached DTE
• Receive, derived from the received signal
Indicators PWR (green) On – Power on
TXD (yellow) On – Data is being transmitted to the link
RXD (yellow) On – Data is being received from the link
LOS (red) On – No E1/T1 data is received from the link
TST (red) On – The local loopback is active

Chapter 1 Introduction
1-4 Technical Specifications
Diagnostics Complies with ITU V.54 (loop 3)
Local Loopback Activated by:
• Internal jumper (standalone unit)
• Front panel pushbutton (rack card)
• DTE circuit 141
Power AC Source 100 to 240 VAC (±10%), 50 or 60 Hz
DC Source -48 VDC (-42 to -60 VDC)
Power Consumption • Standalone: 3W, max
• Card: 5.2W
Fuses Standalone: 250 mA 250V slowblow
Card: 500 mA 250V slowblow
Physical Standalone
Height 39.5 mm / 1.5 in
Width 190 mm / 7.4 in
Depth 160 mm / 6.2 in
Weight 0.6 kg / 1.3 lb
Card Fits one slot in the Rack Nest 2/14
Environment Temperature 0–50°C (32–122°F)
Humidity Up to 90%, non-condensing

Package Contents 2-1
Chapter 2
Installation and Setup
This chapter explains how to configure and install MT1100A, MT1100A-DC,
MT1101A, MT1101A-DC, MT1102A, and MT1102A-DC converters.
After the installation is complete, refer to Chapter 3 for information about
operating standalone units.
Refer to Chapter 4 for troubleshooting and diagnostics information.
2.1 Site Requirements and Prerequisites
MT1100A, MT1101A, MT1102A units should be installed within 1.5m (5 ft) of an
easily-accessible grounded AC outlet capable of furnishing the required supply
voltage, in the range of 100 to 240 VAC.
MT1100A-DC, MT1101A-DC and MT1102A-DC units require a -48 VDC power
source, which must be adequately isolated from the mains supply. In order to
prevent a fire hazard, a suitable fuse must be installed in the live DC line.
Allow at least 90 cm (36 in) of frontal clearance for operator access and at least
10 cm (4 in) clearance at the rear of the unit for interface cable connections.
The ambient operating temperature should be 0 to 50°C (32 to 122°F), at a
relative humidity of up to 90%, non-condensing.
2.2 Package Contents
The package includes the following items:
• Standalone unit or rack card
• The AC power cord or DC power supply connector kit for standalone unit
• Installation and operation manual on a CD
• Rack installation kit (if ordered).

Chapter 2 Installation and Setup
2-2 Configuring Standalone Unit
2.3 Configuring Standalone Unit
This section provides information on the functions and locations of internal
jumpers. Use this information to select the correct setting for your particular
application.
 To install a standalone unit:
1. Determine the required configuration, according to your application, and set
the internal jumpers accordingly. For more information, refer to Setting the
Jumpers on page 2-2.
2. Connect the DTE and G.703 link interfaces, as explained in Connecting the
Interfaces on page 2-5.
3. Connect the power to the unit. For more information, refer to Connecting the
Power on page 2-5.
Setting the Jumpers
This section explains how to set the internal jumpers according to your
requirements. Figure 2-1 and Figure 2-2 show the jumper locations.
Avoid adjusting, maintaining or repairing unit while it is connected to the
power source.
Adjusting, maintaining and repairing unit, while connected to power supply
should only be done by a skilled technician aware of the hazards involved.
Capacitors inside the instrument may still be charged even after the
instrument has been disconnected from its source of supply.
 To set the jumpers:
1. Disconnect the power cable from the mains outlet.
2. Slide the blue side panel forward to detach it from the case.
3. Unscrew the two screws located on the bottom panel at the rear end of the
unit.
4. Separate the two halves of the case by lifting the top cover at the end of the
unit and sliding it forward.
5. Adjust the internal jumpers, as described in Table 2-1 and Table 2-2. Figure 2-1
and Figure 2-2 show the jumper locations.
6. Reinstall the cover and tighten the screws.
Warning

Chapter 2 Installation and Setup
Configuring Standalone Unit 2-3
BAL
BNC
LOC
AMI
HDB3
DTE
JP11
JP9
ANA LOOP
BAL
BNC JP6
JP1 JP2 JP3 JP4
TX & RX CODE
INT
EXT
RCV
J4
Figure 2-1. Jumper Locations, E1 Converter
LOC DTE
JP11
ANA LOOP
INT
EXT
RCV
J4
AMI JP9
B8ZS
AMI JP7
B8ZS
TXCODE RX CODE
Figure 2-2. Jumper Locations, T1 Converter

Chapter 2 Installation and Setup
2-4 Configuring Standalone Unit
Table 2-1. Jumper Settings, E1 Converter
Jumper Description Values Default Setting
JP1, JP2, JP3, JP4,
JP6
Select the E1 interface type BAL – Balanced interface
(RJ-45 connector)
BNC – Unbalanced interface (BNC
coax connectors)
BAL
TX & RX CODE,
JP9
Selects the transmit and
receive coding
AMI – Jumper plug is installed
HDB3 – Jumper plug is not installed HDB3
TIMING, J4 Selects the clock reference RCV (pin 4) – Receive clock
EXT (pin 5) – External clock
INT (pin 6) – Internal clock
RCV
ANA LOOP, JP11 Controls the local analog
loopback activation
LOC – Activates the local analog
loopback
DTE – Allows the activation of the
local analog loopback via DTE
DTE
Table 2-2. Jumper Settings, T1 Converter
Jumper Description Values Default Setting
TX & RX
CODE,
JP9 & JP7
Selects the transmit and
receive coding
AMI – Jumper plug is installed
B8ZS – Jumper plug is not installed B8ZS
TIMING, J4 Selects the clock
reference
RCV (pin 4) – Receive clock
EXT (pin 5) – External clock
INT (pin 6) – Internal clock
RCV
ANA LOOP,
JP11
Controls the local
analog loopback
activation
LOC – Activates the local analog loopback
DTE – Allows the activation of the local
analog loopback via DTE
DTE
Selecting the E1 Impedance
When using the balanced interface:
• Terminate the impedance of G.703 link to 120Ω.
• Use only the RJ-45 connector to transmit full duplex data to the G.703
network over UTP or STP cable.
When using the unbalanced interface:
• Terminate the impedance of G.703 link to 75Ω.
• Use only the coaxial BNC connectors to transmit to the G.703 network via two
coaxial cables.

Chapter 2 Installation and Setup
Configuring Standalone Unit 2-5
Closing the Case
After completing the internal settings, close the unit case.
 To close the case:
1. Position the lower half of the case on the flat surface.
2. Install the top cover making sure the top cover guides enter the corresponding
recesses at the end of the unit.
3. Secure the two screws located at the end of the unit.
4. Fit the inside tabs of the blue side panel into the unit case grooves, and slide
the side panel until snaps into place.
Connecting the Interfaces
Connecting the E1 Line
E1 link interface terminates in balanced and unbalanced connectors, marked
LINK.
 To connect the balanced interface:
• Use RJ-45 male connector and connect it to the RJ-45 port of converter.
Appendix A lists the balanced connector pin assignment.
 To connect the unbalanced interface:
1. Connect the receive line to the back panel connector designated TX.
2. Connect the transmit line to the back panel connector designated RX.
Do not connect both balanced and unbalanced connectors.
Connecting the T1 Line
T1 link interface terminates in balanced RJ-45 connector, marked LINK.
 To connect the balanced interface:
• Use RJ-45 male connector and connect it to the RJ-45 port of converter.
Appendix A lists the balanced connector pin assignment.
Connecting the DTE
Converters support V.35 and RS-530 data channel interfaces. The DTE equipment
can be connected directly to the RIC-E1 DTE port. Connector pin allocations and
cable wiring data appear in Appendix A.
Connecting the Power
Refer to the appropriate section below depending on the unit’s version – AC or
DC.
Warning

Chapter 2 Installation and Setup
2-6 Configuring Standalone Unit
Connecting the AC Power
AC power should be supplied to the MT1100A, MT1101A, MT1102A units
through the 1.5m (5 ft) standard power cable terminated with a standard 3-prong
plug. The cable is provided with the unit.
Before connecting power to the unit, verify that the socket outlet is provided
with a protective ground contact. If you are using an extension cord (power
cable) make sure it is grounded as well
Interrupting the protective (grounding) conductor (inside or outside the unit),
or disconnecting the protective ground terminal can make this unit dangerous.
Make sure that only fuses of the required rating (0.250A, 250V) are used for
replacement. Do not use repaired fuses or short-circuit the fuse holder. Always
disconnect the mains cable before removing or replacing the fuse. If there is a
chance that the fuse protection has been damaged, make the unit inoperative.
 To connect AC power:
1. Connect the power cable to the power connector on the rear panel.
2. Plug the power cable to the mains outlet.
The unit turns on automatically upon connection to the mains.
Connecting the DC Power
 To connect DC power:
• Refer to the DC power supply connection supplement.
Warning

Front Panel Indicators 3-1
Chapter 3
Operation
This chapter describes how to operate converters. Installation procedures
explained in Chapter 2 must be completed and checked before attempting to
operate the unit.
3.1 Front Panel Indicators
Figure 3-1 and Figure 3-2 show front panels of the E1 and T1converters,
respectively. The front panel indicators are described in Table 3-1.
PWR
TXD
TST
RXD
LOS
724-746-5500
E1 Rate Converter
Figure 3-1. E1 Converter Front Panel
PWR
TXD
TST
RXD
LOS
724-746-5500
T1 Rate Converter
Figure 3-2. T1 Converter Front Panel
Table 3-1. Front Panel LED Indicators
Designation Color Function
PWR Green ON – The unis is powered up
TXD Yellow ON – Data is being transmitted to the link
RXD Yellow ON – Data is being received from the link
LOS Red ON – No E1/T1 data is received from the link
TST Red ON – The local loopback is active

Chapter 3 Operation
3-2 Operating Instructions
3.2 Operating Instructions
Turning On
The unit starts operating as soon as AC or DC power is connected. Always connect
the power cable to the power connector first and then to the mains outlet.
The PWR LED lights when power is connected.
Operating the Unit
Converters operate entirely unattended except when performing system tests.
Turning Off
To turn the unit off, disconnect the power cable from the mains outlet.

Performing Local Analog Loopback 4-1
Chapter 4
Troubleshooting and
Diagnostics
4.1 Performing Local Analog Loopback
E1/T1 rate converters support activation of a V.54 diagnostic (loop 3) local
loopback.
This loopback checks the communication and connection between the unit and
the attached DTE, as shown in Figure 4-1. When converter performs a local
loopback, the data received from the local transmitter is both transmitted on the
line and looped back to the local receiver at the digital level. This checks the
operation of all local digital circuitry.
G. 7 0 3
Network
E1/T1 Rate Converter
DTE Line
Tx
Rx
Tx
Rx
Figure 4-1. Running Local Loopback
Activating Local Analog Loopback
You can activate the local analog loopback via DTE interface circuit 141.
When activating the local analog loopback via interface of the DTE connected to the
rack card, make sure to set the ALB DTE jumper (JP4) to EN.
Alternatively, you can initiate the loopback via internal jumper of the standalone
unit or by pressing the ANA pushbutton on the rack card panel.
Do not touch any components other than ANA LOOP (JP11) jumper plug while
activating the local loopback from the standalone unit, in order to avoid
electrical shock.
Warning
Note

Chapter 4 Troubleshooting and Diagnostics
4-2 Troubleshooting
 To activate the local analog loopback from the standalone unit:
1. Open the unit’s case, as described in Chapter 2.
2. Set the JP11 jumper to LOC.
The analog loopback is activated and the TST indicator on the front panel
turns on.
 To activate the local analog loopback from rack card:
• Press the ANA pushbutton on the card’s front panel.
Make sure that the PNL SW jumper (JP5) on the card’s board is set to EN.
The TST indicator on the front panel turns on.
Deactivating Local Analog Loopback
 To deactivate the local analog loopback from the DTE:
• Lower the circuit 141 pins of the DTE interface.
 To deactivate the local analog loopback from the standalone unit:
• Set the JP11 jumper to DTE.
The TST indicator on the front panel turns off.
 To deactivate the local analog loopback from the rack card:
• Press the ANA pushbutton again to return it to the previous position.
4.2 Troubleshooting
Table 4-1 contains troubleshooting information to help you identify and correct
problems.
Table 4-1. Troubleshooting
Trouble Symptoms Probable Cause Corrective Measures
All front panel indicators
are OFF
1. No power Check that both ends of the power cable
are properly connected.
2. Blown fuse Disconnect power cable from both ends
and replace the fuse with another fuse of
proper rating.
LOS indicator is ON 1. Receive line fuses are blown Disconnect power cable from both ends
and replace the fuses with new fuses of
proper rating.
2. Line cables are not properly
connected
Check and adjust both ends of the line
cables.
3. Unbalanced BNC connectors
are reversed
Switch the two BNC connectors.
4. The transformer is damaged Replace the unit.

Rack Nest 2/14 Card Cage 5-1
Chapter 5
MT1100C, MT1102C Cards
This chapter describes the card version of the T1 converter, designed for
installation in the Rack Nest 2/14 card cage. The chapter contains the following
sections:
• The Rack Nest 2/14 card cage
• MT1100C, MT1102C cards
• Power supply to the cards
• Installing the cards.
5.1 Rack Nest 2/14 Card Cage
The Rack Nest 2/14 card cage contains one or two power supplies and up to
14 plug-in cards.
For each of the 14 cards, the rear panel contains a male connector for the terminal
block and a DB-25 connector. A protection cover protects the terminal block
connectors.
Line Connector
The line is to be attached to the rear panel terminal block connectors. It contains
screws for connecting the transmit and receive pairs and ground, if present.
The Rack Nest 2/14 is also available with BNC coaxial unbalanced or RJ-45
balanced line connectors.
DTE Connector
The 25-pin D-type female interface connector provides all interface signals for the
digital interfaces. Units with V.35 interface require an external mechanical
adapter.

Chapter 5 MT1100C, MT1102C Cards
5-2 Power Supply
5.2 Power Supply
Power is supplied to the converter cards from the Rack Nest 2/14 power supply via
the chassis. Each converter card has two fuses (F5 and F6), which protect the
entire system against power failure resulting from a short circuit in one card. The
rating of the fuses is 500 mA, 250V, slowblow (see Figure 5-3).
The Rack Nest 2/14 card cage can accept both AC or DC power supplies. LED
indicators located on the Rack Nest 2/14 front panel (see Figure 5-2) show activity
when the power supply is connected to the mains plug. The power supply
supports the full card cage with any combination of cards.
AC Supply
The AC power supply of the Rack Nest 2/14 is 100, 115, or 230 VAC, ±10%,
47 to 63 Hz.
Optional DC Supply
The DC power supply is -48 VDC (-36 to -72 VDC) or 24 VDC (18 to 32 VDC). It
uses a DC/DC converter module to provide the power required for the cards.
Power Supply with Redundancy
This special ordering option is equipped with two separate power supplies,
operating together and sharing the load of the whole card cage. If either of the
power supplies fails, the other one will continue to supply power to the full card
cage.
Two LED indicators show activity of each power supply. They should both light
when mains power is provided.
It is possible to combine AC and DC power supplies in the same cage.
Note