Transcript
®
®
BLACK BOX NETWORK SERVICES
MARCH 2006 MT331A
G.703 NTU w/V35
G.703 NTU w/V35
E1 Link TD
RD
TM
CUSTOMER Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX SUPPORT FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 INFORMATION Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail:
[email protected]
G.703 NTU W/V35 CE NOTICE The CE symbol on your Black Box equipment indicates that it is in compliance with the Electromagnetic Compatibility (EMC) directive and the Low Voltage Directive (LVD) of the European Union (EU). A Certificate of Compliance is available by contacting Technical Support. RADIO AND TV INTERFERENCE The Multi-Rate Ethernet Extender generates and uses 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 and television reception. The Multi-Rate Ethernet Extender has been tested and found to comply with the limits for a Class A computing device in accordance with specifications in Subpart B of Part 15 of FCC rules, which are designed to provide reasonable protection from such interference in a commercial installation. However, there is no guarantee that interference will not occur in a particular installation. If the Ethernet Extender does cause interference to radio or television reception, which can be determined by disconnecting the unit, the user is encouraged to try to correct the interference by one or more of the following measures: moving the computing equipment away from the receiver, re-orienting the receiving antenna and/or plugging the receiving equipment into a different AC outlet (such that the computing equipment and receiver are on different branches).
2
G.703 NTU W/V35 FCC PART 68
The MT331A is not intended to be connected to the public telephone network. Caution
TRADEMARKS USED IN THIS MANUAL All applied-for and registered trademarks are the property of their respective owners. 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. 3
G.703 NTU W/V35 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. 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.
4
G.703 NTU W/V35 CONTENTS CE Notice .................................................................................................... 2 Radio and TV Interference .......................................................................... 2 FCC Part 68 ................................................................................................. 3 Trademarks Used In This Manual ............................................................... 3 Normas Oficiales Mexicanas (NOM) Electrical Safety Statement ............. 3 1.
General Information ....................................................................................7 1.1 Features ...............................................................................................7 1.2 Description ......................................................................................... 7
2.
Configuration............................................................................................... 8 2.3 DIP switch configuration.................................................................... 8 2.3.1 Switch SW1-1 through SW1-8 ................................................ 9 2.3.2 Switch SW1-1 line coding: HDB3 (default)............................ 9 2.3.3 SW1-2 Local loop: inactive (default) .................................... 10 2.3.4 SW1-6 and SW1-7 clock modes............................................ 10 2.3.5 SW1-8: Enable/disable loop tests from DTE......................... 11
3.
Installation ................................................................................................. 12 3.4 Connecting the twisted pair (120 Ohm) to the G.703 network ........ 12 3.5 Connecting the V.35 serial port........................................................ 12 3.5.6 Connecting to a “DTE” device .............................................. 13 3.5.7 Connecting to a “DCE” device .............................................. 13 3.6 Power connection ............................................................................. 13 3.6.8 Universal AC power (100–240VAC) .................................... 13
4.
Operation ................................................................................................... 14 4.7 Power-up........................................................................................... 14 4.8 LED status monitors ......................................................................... 14 4.9 Local loop diagnostics...................................................................... 15 4.9.9 Operating local loopback (LL) .............................................. 15
A.
G.703 specifications .................................................................................. 16
B.
Interface pin assignment............................................................................ 17
5
G.703 NTU W/V35
1. General Information Thank you for your purchase of this Black Box product. If any questions arise during installation or use of the unit, contact Black Box Tech Support at (724) 746-5500. 1.1 Features • Terminates G.703 E1 service (2.048 Mbps) • Switch-selectable AMI or HDB3 line encoding options • Local loopback diagnostics • Internal, External, and G.703 network timing • CE approval • 100-240VAC • Conforms to ONP requirements CTR 12 for connection to international Tele-
com networks 1.2 Description The MT331A receives clear channel E1/G.703 (2.048 Mbps) data from the telco’s digital data network. The MT331A terminates the G.703 telco interface and converts the data for transmission to a user-oriented serial. The MT331A can connect to a Router, FRAD, PABX or Multiplexer over its serial interface at 2.048 Mbps.
6
G.703 NTU W/V35
2. Configuration The MT331A features configuration capability via hardware DIP switches. This section describes all possible DIP switch configurations of the MT331A. 2.3 DIP switch configuration The MT331A has one internal DIP switch that allow configuration for a wide range of applications. The switch is accessed from the underside of the MT331A. Figure 1 shows the location of the DIP switch on the bottom of the printed circuit board. Rear
ON
S1
OFF
S2
Front Figure 1. Underside of MT331A showing location of DIP switches
The MT331A DIP switch can be configured as either “ON” or “OFF”. Figure 2 shows the orientation of the DIP switch with respect to ON/OFF positions.
Figure 2. Close-up of configuration switches
7
G.703 NTU W/V35 2.3.10 SWITCH SW1-1 THROUGH SW1-8 Position
Function
Factory Default
SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6
Line Code LLB
Clock Mode
SW1-7
Clock Mode
OFF
SW1-8
TM from DTE
OFF
Selected Option
OFF OFF Reserved Reserved Reserved OFF
HDB3 OFF
Received Recovered Received Recovered Enabled
2.3.11 SWITCH SW1-1 LINE CODING: HDB3 (DEFAULT) Use Switch SW1-1 to control the Network Line Coding options. Set these options to be the same as the Line Coding given to you by your Service Provider. If you are using two MT331As together as short range modems, set both units to HDB3. SW1-1
Line Encoding
OFF ON
HDB3 AMI
Options: HDB3, AMI HDB3: In this line coding, the transmitter substitutes a deliberate bipolar violation when excessive zeros in the data stream are detected. The receiver recognizes these special violations and decodes them as zeros. This method enables the network to meet minimum pulse density requirements. Unless AMI is required in your application, HDB3 should be used whenever possible. AMI: Alternate Mark Inversion defines a pulse as a “mark,” a binary one, as opposed to a zero. In an E1 network connection, signals are transmitted as a sequence of ones and zeros. Ones are sent as pulses, and zeros are sent as spaces, i.e., no pulse. Every other pulse is inverted from the previous pulse in polarity, so that the signal can be effectively transmitted. This means, however, that a long sequence of zeros in the data stream will cause problems, since the NTU receiving the signal relies on the signal to recover the 2.048 Mbps clock. 8
G.703 NTU W/V35 If you must use AMI, you should ensure that the data terminal equipment connected to the unit provides a minimally acceptable pulse density. For this reason, there are advantages to using HDB3 instead. AMI coding does not inherently account for ones density. To meet this requirement, the user should ensure that the data inherently meets pulse density requirements. 2.3.12 SW1-2 LOCAL LOOP: INACTIVE (DEFAULT) Use SW1-2 to activate/deactivate local loopback test. SW1-2
Setting
OFF ON
Local Loopback Inactive Local Loopback Active
2.3.13 SW1-6 AND SW1-7 CLOCK MODES Use switches SW1-6 and SW1-7 to configure the MT331A for internal, external, or receive recover clock mode. SW1-6
SW1-7
Clock Mode
ON ON OFF OFF
ON OFF ON OFF
Network (Received Recovered) Internal External Network (Received Recovered)
Network Clock Internal Clock External Clock
Transmitter timing is derived using the received line signal (received recovered) from the network. Transmitter timing is derived from an internal clock source. Transmitter timing is derived from DTE terminal timing.
2.3.14 SW1-8: ENABLE/DISABLE LOOP TESTS FROM DTE Use switch SW1-8 to allow MT331A to enter loopback tests when the DTE raises the appropriate loop request pin. SW1-8
Setting
OFF ON
Response to DTE Loopback Request Enabled Response to DTE Loopback Request Disabled
9
G.703 NTU W/V35
3. Installation Once the MT331A is properly configured, it is ready to connect to the G.703 interface, to the serial port, and to the power source (see Figure 3). This section describes how to make these connections. \
A
he
e ad
in t
US
M
e
Lin
ce
rfa
Inte
r
we
Po
Line
V.35 Interface Power
Figure 3. Rear panel
3.4 Connecting the twisted pair (120 Ohm) to the G.703 network The MT331A is equipped with a single RJ-48C jack for connections to a 120 Ohm twisted pair G.703 network interface. Use Figure 4 below to connect the 120 Ohm G.703 network channel. (No Connection) 8 (No Connection) 7 (No Connection) 6 (TX+) 5 (TX-) 4 (No Connection) 3 (RX-) 2 (RX+) 1
8 7 6 5 4 3 2 1
Figure 4. G.703 120-Ohm connection
3.5 Connecting the V.35 serial port The MT331A supports V.35 serial port connections. This section describes how to connect the serial ports to your terminal equipment. 10
G.703 NTU W/V35 3.5.15 CONNECTING TO A “DTE” DEVICE The serial port on the MT331A/C (V.35 version) 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 or less. When purchasing or constructing an interface cable, please refer to the pin diagrams in Appendix B. on page 15 as a guide. 3.5.16 CONNECTING TO A “DCE” DEVICE If the MT331A serial interface is hard-wired as a DCE, you must use a null modem cable when connecting to a modem, multiplexer or other DCE device. This cable should be of the shortest possible length—we recommend 6 feet or less. 3.6 Power connection 3.6.17 UNIVERSAL AC POWER (100–240VAC) The MT331A uses a 5VDC, 2A universal input 100–240VAC, power supply (center pin is +5V). The universal input power supply has a male IEC-320 power entry connector. This power supply connects to the MT331A by means of a barrel jack on the rear panel. Many international power cords are available for the universal power supply. The MT331A powers up as soon as it is plugged into an AC outlet—there is no power switch. There are no user-serviceable parts in the power supply section of the MT331A. Contact Black Box technical support at +1 (724) 746-5500 for more information. WARNING
11
G.703 NTU W/V35
4. Operation When the MT331A has been properly configured and installed, it should operate transparently. This sections describes power-up, LED status monitors, and the built-in loopback test modes. 4.7 Power-up Before applying power to the MT331A, refer to section 3.6, “Power connection” on page 11 and ensure that the unit is properly connected to the appropriate power source. 4.8 LED status monitors The MT331A features six front panel LEDs that monitor connections on the G.703 and signaling, error and test modes. Figure 5 shows the front panel location of each LED. Descriptions of each LED follow Figure 5.
5
V3
3
70
G.
U NT
w/
TM
TM
RD k
E1
TD
Lin
RD TD E1 Link
Figure 5. MT331A Front panel
E1 Link TD & RD TM
12
(Active Green) Solid green (On) indicates that the end to end E1 Link is up, signifying that the link is active. The E1 Link LED is Off when the link is down. Glows yellow to indicate an idle condition of Binary “1” data on the respective terminal interface signals. Green indicates Binary “0” data. (Active Yellow) Solid Yellow indicates an Active Test Mode. The unit may be placed in test mode by the local user.
G.703 NTU W/V35 4.9 Local loop diagnostics The MT331A offers V.54 loop diagnostics. Use these diagnostics to test the NTU and any communication links. This test can be activated via DIP switches or via signals on the MT331A serial port interface. 4.9.18 OPERATING LOCAL LOOPBACK (LL) The Local Loopback (LL) test checks the operation of the local MT331A, and is performed separately on each unit. Any data sent to the local MT331A in this test mode will be echoed (returned) to the user device (i.e., characters typed on the keyboard of a terminal will appear on the terminal screen) G.703 NTU MT331A
G.703 NTU MT331A Serial Device
Internal Clocking
Clock/ Data
Cable Span
Receive Recover Clocking
Clock/ Data
Data
Clock/ Data
Serial Device
Data MT311A
MT311A
Figure 6. Local Loopback for a network termination application
To perform a LL test, follow these steps: 1. Activate LL. This may be done in one of two ways: — Place the DIP switch SW1-2 to the “ON” position. — Activate the “LL” signal on the DTE. If you are not sure which lead is the “LL” signal, please refer to appendix B. “Interface pin assignment” on page 15. 2. Verify that the data terminal equipment is operating properly and can be used for a test.
13
G.703 NTU W/V35
A. G.703 specifications Network Data Rate Network Connector Nominal Impedance Line Coding Line Framing Clocking Distance Configuration Power Supply Humidity Temperature Dimensions:
14
2.048 Mbps RJ-48C 120 Ohm Selectable AMI or HDB3 G.703 (Unframed) Internal or Network (Receive Recover) Maximum 1.8 km (6,000 ft.) on 24 AWG Cable One 8-Position DIP Switches +5VDC External power supply/100–240VAC, 50– 60Hz, 0.4A Up to 90% non-condensing 0 to 50˚ C 9.0 x 5.3 x 2.0 cm (3.5”L x 2.1”W x 0.78”H)
G.703 NTU W/V35
B. Interface pin assignment V.35 Interface (M/34F Female Connector) (DCE Configuration) Pin #
Signal
Pin #
Signal
B C D E F H
SGND (Signal Ground) RTS (Request to Send) CTS (Clear to Send) DSR (Data Set Ready) CD (Carrier Detect) DTR (Data Terminal Ready) LLB (Local Line Loop) TM (Test Mode) RDL (Remote Digital Loop) TD (Transmit Data)
R S T U V W
RD (Receive Data) TD/ (Transmit Data-B) RD/ (Receive Data-B) XTC (External Transmit Clock) RC (Receive Timing) XTC/ (External Transmit Clock)
X Y AA
RC/ (Receive Timing) TC (Transmit Clock-A) TC/ (Transmit Clock-B)
L M N P
15
G.703 NTU W/V35 V.35 To V.35 (Straight-through Cable) Pin Out
16
V.35 To V.35 (Cross Over Cable) Pin Out
Pin
Function
Pin
Function
Pin
A
Frame Ground
A
A
B
Signal Ground
B
C D E F H K L P R S T U V W X Y AA
RTS NC DSR DCD DTR NC NC TD (A) RD (A) TD (B) RD (B) SCTE (A) RT (A) SCTE (B) RT (B) NC NC
C D E F H K L P R S T U V W X Y AA
Frame Ground Signal Ground DCD NC DTR RTS DSR NC NC RD (A) TD (A) RD (B) TD (B) RT (A) SCTE (A) RT (B) SCTE (B) NC NC
B F D H C E K L R P T S V U X W Y AA
G.703 NTU W/V35 Notes ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________
17
G.703 NTU W/V35
18
G.703 NTU W/V35
19
®
BLACK BOX
®
NETWORK SERVICES
© Copyright 2006. Black Box Corporation. All rights reserved. 1000 Park Drive
•
Lawrence, PA 15055-1018
•
724-746-5500
•
Fax 724-746-0746
