Black Box ME0004C-G703 User manual

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]
NOVEMBER 2001
ME0004C-10BT
ME0004C-G703
ME0004C-RS530
ME0004C-V24
ME0004C-V35
ME0004C-X21
High-Speed 2-Wire Short-Range DSL
Line Driver
(mDSL Rack Card)

1
FCC AND IC RFI STATEMENTS
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio frequency energy and if not
installed and used properly, that is, in strict accordance with the manufacturer’s
instructions, may cause interference to radio communication. It has been tested
and found to comply with the limits for a Class A computing device in accordance
with the specifications in Subpart B of Part 15 of FCC rules, which are designed to
provide reasonable protection against such interference when the equipment is
operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user at his own
expense will be required to take whatever measures may be necessary to correct
the interference.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from
digital apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
EUROPEAN UNION DECLARATION OF CONFORMITY
This equipment complies with the requirements of the European EMC Directive
89/336/EEC.

2
HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
NORMAS OFICIALES MEXICANAS (NOM)
ELECTRICAL SAFETY STATEMENT
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de
que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca
de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc..
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que
sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá
a lo descrito en las instrucciones de operación. Todo otro servicio deberá ser
referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama, sofá,
alfombra o superficie similar puede bloquea la ventilación, no se debe colocar
en libreros o gabinetes que impidan el flujo de aire por los orificios de
ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del
tipo descrito en el instructivo de operación, o como se indique en el aparato.

3
NOM STATEMENT
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización
del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen del
aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas
de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea
usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean
derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su
desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.

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HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
TRADEMARKS USED IN THIS MANUAL
DECnet™ is a trademark of Digital Equipment Corporation.
Internet Explorer®is a registered trademark of Microsoft Corporation.
IPX™ is a trademark of Novell Incorporated.
NetBIOS®is a registered trademark of International Business Machines
Corporation.
Netscape®is a registered trademark of Netscape Communications Corporation.
Any other trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.

5
CONTENTS
Contents
Chapter Page
1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Configuring the Hardware Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.1 Reversible Interface Driver Board. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.2 Connecting to a DTE Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.3 Connecting to a DCE Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.4 Configuring the X.21 Interface Module. . . . . . . . . . . . . . . . . . . . . . 12
3.1.5 Configuring DIP-Switch Set S1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.6 Configuring DIP-Switch Set S2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1.7 Configuring DIP-Switch Set S3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 mDSL Rack Card Plug-and-Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3 Configuring the Rear Interface Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3.1 DB25 (RS-530 and V.24) Rear Card Strap Settings . . . . . . . . . . . . . 19
3.3.2 M/34 (V.35) Rear Card Strap Settings . . . . . . . . . . . . . . . . . . . . . . . 21
3.3.3 DB15 (X.21) Rear Card Strap Settings . . . . . . . . . . . . . . . . . . . . . . . 22
4. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.1 The Rack Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2 Installing the mDSL Rack Card into the Chassis. . . . . . . . . . . . . . . . . . . . 28
4.3 Wiring the mDSL Rack Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3.1 Connection to the Twisted-Pair Interface . . . . . . . . . . . . . . . . . . . . 29
4.3.2 Two-Wire Cable Connection via RJ-45 . . . . . . . . . . . . . . . . . . . . . . . 29
5. Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.1 LED Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2 Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.2 Restart Procedure and Timeouts . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.2.3 Loops and Patterns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.4 Using the V.52 (BER) Test-Pattern Generator . . . . . . . . . . . . . . . . 38
Appendix A. Terminal Interface Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . 39
Appendix B. Distance Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Appendix C. Line Interface Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

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HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
Chapter Page
Appendix D. G.703/G.704 Rear Card Module . . . . . . . . . . . . . . . . . . . . . . . . . . 44
D.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
D.2 Typical Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
D.2.1 Network Termination Application. . . . . . . . . . . . . . . . . . . . . . . . . . 44
D.2.2 Network Extension Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
D.3 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
D.3.1 DIP-Switch Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
D.3.2 Jumper Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
D.4 Installing the Rear Card and Front Function Card . . . . . . . . . . . . . . . . . 48
D.5 Making Interface Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
D.5.1 Connect Twisted Pair (120 ohm) to G.703/G.704 Network . . . . . 49
D.5.2 Connect Dual Coaxial Cable (75 ohm) to G.703/G.704 Network 50
Appendix E. 10BASE-T Ethernet Rear Card Module. . . . . . . . . . . . . . . . . . . . . 52
E.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
E.2 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
E.3 Connecting the Interface Driver Board. . . . . . . . . . . . . . . . . . . . . . . . . . . 53
E.4 Installing the Rear Interface Card and the Front Function Card . . . . . . 54
E.5 Connecting to the 10BASE-T Ethernet Port . . . . . . . . . . . . . . . . . . . . . . . 55
E.5.1 Connecting the 10BASE-T Ethernet Port to a Hub . . . . . . . . . . . . 56
E.5.2 Connecting the 10BASE-T Ethernet Port to a PC (DTE). . . . . . . . 56
E.5.3 Connecting the Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
E.6 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
E.6.1 Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
E.6.2 LED Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

7
CHAPTER 1: Specifications
1. Specifications
Transmission Format: Synchronous
Transmission Line: Two-wire unconditioned twisted pair
Clocking: Internal, external, or receive recovered clock
Interface Modules: 10BASE-T, G.703/G.704, RS-530, V.24, V.35, X.21
Line Rates: 144, 272, 400, 528, 784, 1040, 1552, 2064, and 2320 kbps
DTE Rates: 64, 128, 192, 256, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, 960,
1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536, 1600, 1664, 1728, 1792, 1856,
1920, 1984, 2048, 2112, 2176, 2240, and 2304 kbps
Diagnostics: V.52-compliant bit error rate pattern (511/511E pattern) generator
and detector with error injection mode; Local Line Loopback and Remote Digital
Loopback, activated by front-panel switch or via serial interface
LED Status Indicators: TD, RD, CTS, CD, DTR, NS (no signal), ER (error), and
TM (test mode)
Connectors: RJ-45 or terminal block on line side; DB25 female, M/34 female,
DB15 female, or dual BNC on serial interface side, depending upon which
interface module is installed
Temperature Range: 32 to 122°F (0 to 50°C)
Altitude: Up to 15,000 feet (4572 m)
Humidity: 5 to 95% noncondensing
Power: 90 to 264 VAC, 50–60 Hz (universal input), 10 watts
Size: Front Card: 3.1"H x 0.95"W x 4.8"D (7.9 x 2.4 x 12.2 cm); Rear Card: 2.8"H x
0.95"W x 3.3"D (7.1 x 2.4 x 8.4 cm)
Weight: Front Card: 0.22 lb. (0.1 kg); Rear Card (M/34 with V.35 interface):
0.16 lb. (0.07 kg); Rear Card (DB25/RS-232 interface): 0.12 lb. (0.05 kg); Rear
Card (Dual BNC): 0.2 lb. (0.09 kg); Rear Card (DB15): 0.12 lb. (0.05 kg)

8
HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
2. Introduction
2.1 Description
The High-Speed 2-Wire Short-Range DSL Line Driver Rack Card provides high-
speed 2-wire connectivity to ISPs, PTTs, and corporations using mDSL (Multi-rate
Digital Subscriber Line) technology. Multi-rate DSL offers the ability to deliver the
maximum bit rate that a twisted-pair line can accommodate. Supporting multiple
line rates from 144 kbps to 2.320 Mbps, the mDSL Rack Card provides “megabit”
speeds to leased-line, LAN-to-LAN interconnection, and WAN access networks over
3.6 miles/5.8 km (1.054 Mbps on 24-AWG/0.5-mm wire).
The mDSL Rack Card allows DTE speeds from 64 kbps to 2.3 Mbps in 64-kbps
increments. Features include loopback diagnostics, out-of-band SNMP/HTTP
remote management capabilities when using the SNMP Management Module
(part number RM261C-SNMP), and externally accessible configuration switches.
As a symmetric DSL NTU, the mDSL Rack Card offers the same data rates in both
directions over a single pair of regular telephone lines using Carrierless Amplitude
and Phase (CAP) modulation. The mDSL Rack Card is designed to fit into Black
Box’s 2U-high rack chassis (part number RM260). This chassis uses a mid-plane
architecture, allowing front cards to be plugged into different rear cards. Please
see the RM260 manual for more information on the power-supply options that are
available.
The mDSL Rack Card Plug-and-Play feature allows you to configure the DTE rate
for the link from the rack card at the central office. The standalone unit at the
customer premise site will automatically configure itself to the DTE rate of the rack
card. Other configuration parameters fall to the default state. This allows changes
in the configuration to be handled from a single end of the link.
2.2 Features
• DSL distances on just two wires using mDSL technology.
• DTE speeds from 64 kbps to 2.3 Mbps.
• 2-wire operation.
• Fits in the 2U Rackmount Chassis (part number RM260).
• Plug-and-Play master capable.

9
CHAPTER 2: Introduction
• SNMP network management with in-band management of remote units plus
advanced diagnostics and statistics using the RM261C-SNMP.
• Internal, external, or receive recovered clocking options.
• LED indicators for TD, RD, CTS, CD, DTR, TM, ER, and NS.

10
HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
3. Configuration
3.1 Configuring the Hardware Switches
The mDSL Rack Card front card uses hardware switches for configuration. An
interface driver board strap and three eight-position DIP switches are positioned
on the bottom side of the front card (see Figure 3-1).
Figure 3-1. The mDSL Rack Card’s configuration switches.
Figure 3-2 shows the orientation of the DIP switches with respect to the ON and
OFF positions.
Figure 3-2. Close-up of configuration switches
(all switches are identical in appearance).
SW3
SW2
SW1

11
CHAPTER 3: Configuration
3.1.1 R EVERSIBLE I NTERFACE D RIVER B OARD
The mDSL Rack Card features switchable interface driver boards that allow a wide
range of DTE interface connections. Figure 3-3 shows the interface driver board on
the top of the mDSL Rack Card PC board.
Figure 3-3. Close-up of the interface driver board.
Follow the instructions below to select the correct interface for your application:
1. With the mDSL front card pulled out of the rack chassis, locate the driver
board on the top of the mDSL front card.
2. Lift the interface board gently off of the PC board.
3. Locate the correct interface on the bottom of the driver board. For example,
the RS-232/V.35 interface board is marked “THIS SIDE UP FOR RS-232” on
one side and “THIS SIDE UP FOR V.35” on the other side. Other “single”
interface boards are marked with “FRONT” on one side of the board.
4. Re-orient the interface board into the socket with the appropriate interface
pointed UP and with the arrow pointing toward the front panel of the mDSL
Rack Card PC board.
5. Push the interface driver board gently onto the socket and re-install into the
rack system.
THIS SIDE UP FOR V.35.
Interface
Driver
Board
FRONT

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HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
3.1.2 C ONNECTING TO A DTE D EVICE
The serial port on most interface modules (all except the X.21 module) is hard-
wired as a DCE. Therefore these modules “want” to plug into a DTE such as a
terminal, PC, or host. When making the connection to your DTE device, use a
straight-through cable of the shortest possible length—we recommend 6 feet
(1.8 m) or less. When purchasing or constructing an interface cable, please refer to
the pin diagrams in Appendix A as a guide.
3.1.3 C ONNECTING TO A DCE D
EVICE
If the mDSL Rack Card interface module is hard-wired as a DCE (all except the
X.21 module), you must use a null-modem cable when connecting to a modem,
multiplexor, or other DCE device. This cable should be of the shortest possible
length—we recommend 6 feet (1.8 m) or less. When purchasing or constructing a
null-modem interface cable, use the pin diagrams in Appendix A as a guide.
NOTE
Pinout requirements for null-modem applications vary widely between
manufacturers. If you have any questions about a specific application,
call Black Box Technical Support at 724-746-5500.
3.1.4 C ONFIGURING THE X.21 I NTERFACE M ODULE
The serial port on the X.21 interface module is default wired as a DCE, but may be
switched to a DTE. This is done by reversing the orientation of the DCE/DTE
strap, as described below:
To reverse DCE/DTE orientation, remove the interface module according to the
instructions in Section 3.1.1. The DCE/DTE strap is located on the top side of the
interface module’s PC board. The arrows on the top of the strap indicate the
configuration of the X.21 port (for example, if the DCE arrows are pointing
toward the rear card connector, the X.21 port is wired as a DCE). Reverse the
DCE/DTE orientation by pulling the strap out of its socket, rotating it 180º, then
plugging the strap back into the socket. You will see that the DCE/DTE arrows now
point in the opposite directions, showing the new configuration of the X.21 port.
Reinstall the module according to the instructions in Section 3.1.1.
3.1.5 C ONFIGURING DIP-S WITCH S ET S1
Switch S1 is used to set the address of the card in the SNMP Management Module.
When the mDSL Rack Card is installed with a SNMP Management Module, the
cards and their remote units can be SNMP managed using a standard Network
Management Station (NMS) or a standard Web browser (Netscape®Navigator or
Internet Explorer®). For more information about setting the address, refer to the
SNMP Management Module Users’ Manual (part number RM261C-SNMP).

13
CHAPTER 3: Configuration
NOTE
If you are not using your mDSL Rack Card in a network-managed
environment, please set all S1 switches to the ON position.
3.1.6 C ONFIGURING DIP-S WITCH S ET S2
The configuration switches on S2 allow you to specify the clocking mode and
response to DTE loop enable. Default settings of S2 are shown in Table 3-1.
Table 3-1. S2 summary.
Position Function Factory Default
S2-1 Reserved Off
S2-2 Reserved Off
S2-3 Reserved Off
S2-4 Reserved Off
S2-5 Reserved Off
S2-6 Clock Mode On
S2-7 Clock Mode On
S2-8 Enable Loop from DTE Off Disable
Switches S2-1, S2-2, S2-3, S2-4, and S2-5: These switches are reserved for future use
and should remain in the OFF position.
}Internal

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HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
Switches S2-6 and S2-7: Clock Mode
Use Switches S2-6 and S2-7 to configure the mDSL Rack Card for internal,
external, or receive recover clock mode.
Table 3-2. Clock mode.
CO/CP S2-6 S2-7 Clock Mode Description
Unit
CO On On Internal Transmit clock generated
internally
CO Off On External (DTE) Transmit clock derived
from the terminal interface
CP On Off Receive Recover Transmit clock derived
from the receive line
Off Off Reserved
Switch S2-8: Enable/Disable Loop Tests from DTE
Use Switch S2-8 to allow the mDSL Rack Card to enter loopback tests when the
DTE raises the appropriate loop request pin.
Table 3-3. Enable/disable loop tests.
S2-8 Setting
On Response to DTE Loopback Request Enabled
Off Response to DTE Loopback Request Disabled

15
CHAPTER 3: Configuration
3.1.7 C ONFIGURING DIP-S WITCH S ET S3
Use the eight DIP switches in Switch S3 to enable the DTE connection rate. The
following table summarizes default positions of DIP-Switch S3. Detailed
descriptions of each switch follow the table.
Table 3-4. S3 summary.
Position Function Factory Default
S3-1 DTE Rate On
S3-2 DTE Rate Off
S3-3 DTE Rate Off
S3-4 DTE Rate Off
S3-5 DTE Rate On
S3-6 DTE Rate On
S3-7 Reset Software Defaults On Normal operation
S3-8 Transmit Data Sample Point On Normal operation
Switch S3-1: DTE Rate
Use Switches S3-1 through S3-6 to set the rate-adaptive DTE bit rate.
Table 3-5. DTE bit rate.
S3-1 S3-2 S3-3 S3-4 S3-5 S3-6 DTE Rate (kbps)
Off Off On On On On 64
On On Off On On On 128
Off On Off On On On 192
On Off Off On On On 256
Off Off Off On On On 320
On On On Off On On 384
Off On On Off On On 448
On Off On Off On On 512
Off Off On Off On On 576
On On Off Off On On 640
Off On Off Off On On 704
On Off Off Off On On 768
Off Off Off Off On On 832
}768 kbps

16
HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
Table 3-5 (continued). DTE bit rate.
S3-1 S3-2 S3-3 S3-4 S3-5 S3-6 DTE Rate (kbps)
On On On On Off On 896
OffOnOnOnOffOn 960
On Off On On Off On 1024
Off Off On On Off On 1088
On On Off On Off On 1152
Off On Off On Off On 1216
On Off Off On Off On 1280
Off Off Off On Off On 1344
On On On Off Off On 1408
Off On On Off Off On 1472
On Off On Off Off On 1536
On On Off Off Off On 1600
Off On Off Off Off On 1664
On Off Off Off Off On 1728
Off Off Off Off Off On 1792
On On On On On Off 1856
Off On On On On Off 1920
On Off On On On Off 1984
Off Off On On On Off 2048
On On Off On On Off 2112
Off On Off On On Off 2176
On Off Off On On Off 2240
Off Off Off On On Off 2304
NOTE
The actual line rates of the line driver is determined by the selection of
the DTE rate. To see the line rate associated with various DTE rates,
refer to the distance chart in Appendix B.
Switch S3-7: Reset Software Defaults
Switch S3-7 allows the user to reset the software-configured factory defaults. This
will only be needed when using the SNMP Management Module (part number
RM261C-SNMP) to SNMP manage your units. For more information, please refer
to the SNMP Management Module Users’ Manual.

17
CHAPTER 3: Configuration
Table 3-6. Reset software defaults.
S3-7 Setting
On Normal Operation
Off Reset
Switch S3-8: Transmit Data (TD) Sampling Point
Table 3-7. Transmit data sampling point.
S3-8 Setting Description
On Normal TD sampled on the falling edge of the
mDSL Rack Card Transmit Clock (TC)
Off Invert TD sampled on the rising edge of the
mDSL Rack Card Transmit Clock
3.2 mDSL Rack Card Plug-and-Play
The mDSL Rack Card Plug-and-Play application allows ISPs and PTTs to quickly
upgrade the link speed for a customer without re-configuring the customer
premise (CP) unit (such as the ME0008A or ME0005A). It will also allow ISPs and
PTTs to set up all of the configurations at the central office (on the rack cards)
before installation of the standalone units, thus saving time spent configuring and
re-configuring DIP-switch settings.
The mDSL Rack Card Plug-and-Play feature allows you to configure the DTE rate
for the link from the rack card at the Central Office (CO). The standalone unit at
the Customer Premise (CP) site will automatically configure itself to the DTE rate
of the rack card. Other configuration parameters fall to the default state. This
allows changes in the configuration to be handled from a single end of the link.
When installing a CO/CP-style application, the local end of the link is comprised
of a CO unit (mDSL Rack Card) set to either internal or external clocking mode
and a CP unit (such as the ME0008A, ME0005A, or another ME0004C) set as a
Plug-and-Play unit. The Plug-and-Play CP standalone will have all of its DIP switches
set to the ON position (as indicated in Figure 3-4).

18
HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
Figure 3-4. Typical Plug-and-Play application.
When the units are connected, the CP will come up with a predefined default
configuration (Receive Recovered clocking). During the handshaking process
between the units, the CO unit will set the DTE rate/line rate of the CP unit to
match its DIP-switch configuration settings. If the DTE rate for the link requires a
change, the change is needed only at the CO side of the link.
The mDSL Rack Card Plug-and-Play application will also work in the managed
system using the SNMP Management Module and mDSL Rack Cards installed in
the 2U rack system. In this application, the system administrator can configure the
entire rack through the Network Management Station (NMS) before the
standalone (CP) units are installed. For more information on the SNMP
management of your rack, please refer to the SNMP Management Module Operations
Manual.
3.3 Configuring the Rear Interface Cards
The mDSL Rack Card has five interface card options: 10BASE-T, G.703, RS-530,
V.35, and X.21. Each of these options supports one DTE interface connection and
one 2-wire line connection.
NOTE
The ME0004C rear cards are specifically designed to operate with the
ME0004C function card and must not be swapped with other function
cards.
Before installation, examine the rear card you have selected to be sure it is
properly configured for your application. Each rear card is configured by setting
straps located on the PC board. To configure the rear cards, set the configuration
straps. Figure 3-5 shows the orientation of these straps. Each strap can either be on
pegs 1 and 2 or on pegs 2 and 3.
mDSL Rack
Card (ME0004C)
(CO)
DIP switches configured
according to specific
application requirements.
DIP switches all in ON position.
mDSL Rack
Card (ME0004C)
(CP)

19
CHAPTER 3: Configuration
Figure 3-5. Orientation of interface card straps.
Sections 3.3.1, 3.3.2, and 3.3.3 describe the strap locations and possible settings for
each rear card.
3.3.1 DB25 (RS-530 AND V.24) R EAR C ARD S TRAP S ETTINGS
Figure 3-6 shows strap locations for the DB25 rear cards. These straps determine
various grounding characteristics for the terminal interface and twisted-pair lines.
JB3 and JB4 are user-configurable.
Figure 3-6. Strap locations.
JB3
JB4