Black Box MT720A-232T User Manual
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Black Box MT720A-232T User Manual

Black Box MT720A-232T User Manual

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Fradswitch-8A (232)
Fradswitch-8A (V.35)
Fradswitch-8A (X21)
Fradswitch-16A (232)
Fradswitch-16A (V.35)
Fradswitch-16A (X21)
Fradswitch-24A (232)
Fradswitch-24A (V.35)
Fradswitch-24A (X21)
P W R
CUSTOMER
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
SUPPORT
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
INFORMATION
Web site: www.blackbox.com • E-mail: info@blackbox.com
8
N E L S
7
C H A N
6
5
4
3
2
1
M A IN
3
2
1
MT720A-232T
MT720A-35T
MT720AE-X21T
MT721A-232T
MT721A-35T
1
R E S E
T
T E S T
O V F
E R R
S Y N C
3
2
1
MARCH 1995
MT721AE-X21T
MT722A-232T
MT722A-35T
MT722AE-X21T
C H - 8 A
S W I T
F R A D
8
7
6
5
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3
2

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  • Page 1 Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 SUPPORT Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 INFORMATION Web site: www.blackbox.com • E-mail: info@blackbox.com...
  • Page 2 FCC AND IC STATEMENTS FEDERAL COMMUNICATIONS COMMISSION INDUSTRY CANADIA 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 J 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.
  • Page 3 FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 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.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS Contents Chapter Page 1. Specifications..............................4 2. Introduction ..............................6 2.1 Overview ..............................6 2.2 Applications...............................6 2.3 X.25 Link Features..........................10 2.4 Frame Relay Link Features ........................10 2.5 HDLC Link Features..........................11 2.6 ASYNC Link Features..........................11 2.7 Buffer Capacity............................11 2.8 Asynchronous Channel Interface Characteristics.................11 2.9 Channel PAD Characteristics .........................11 2.10 ITU Facilities ............................12 2.11 Command Facility Features........................12...

  • Page 5: Specifications

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 1. Specifications Links (X.25) Characteristics Number of Links Data Rate All the links aggregate up to 2.15 Mbps Interface RS-232/V.24, X.21, or V.35 (selected when you order) Connectors RS-232/V.24 25-pin D-type, female X.21 15-pin, female V.35 34-pin, female Complies with ITU X.25, LAPB (Blue Book, 1988) Protocol Configuration...
  • Page 6 CHAPTER 1: Specifications General (9) LEDs: Power; Main links activity; Sub-channels activity; Indicators (3) Loss of synchronization; Error; Overflow; Test Operating Temperature 32 to 122°F (0 to 50°C) Humidity Up to 90%, noncondensing Power Supply Voltage 115- or 230-VAC (depending which model you ordered), 50/60 Hz Consumption Fuse...

  • Page 7: Introduction

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 2. Introduction 2.1 Overview The Fradswitch-8A, Fradswitch-16A, and Fradswitch-24A are combinations of a high-performance X.25/Frame Relay PAD (Packet Assembler/Disassembler) and a Packet Switch, for concentrating and switching data in an X.25/Frame Relay environment. A Fradswitch can connect up to eight, sixteen, or twenty-four asynchronous channels, and up to three synchronous links, and perform packet-switching functions between all links (X.25 to X.25, X.25 to Frame Relay, and Frame Relay to Frame Relay).
  • Page 8 CHAPTER 2: Introduction • Routing between several Frame Relay devices or networks (Frame Relay to Frame Relay switching). (See Figure 2-5.) • Connection of devices supporting HDLC protocol to the X.25 or Frame Relay network. (See Figure 2-6.) FRADSWITCH-8A STM LINK X.25 STAT MUX NETWORK...
  • Page 9 FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A FRADSWITCH-8A 64 Kbps X.25 STAT-24 PUBLIC (MX868A) X.25 NETWORK X.25 COMPUTER Figure 2-2. Fradswitch-8A providing X.25 switching and async channel expansion. X.25 NETWORK ACCESS 128 Kbps X.25 PUBLIC NETWORK ASYNC LINK X.25 REDUNDANT NETWORK ACCESS 19.2 Kbps FRADSWITCH-8A ASYNC CHANNELS...
  • Page 10 CHAPTER 2: Introduction ASYNC FRAME FRAME FRAME X.25 RELAY RELAY RELAY NETWORK FRADSWITCH-8A FRADSWITCH-8A Figure 2-4. (a) Fradswitch-8A operating as a switch at the user side: Conversion of Frame Relay to X.25. (b) Fradswitch-8A operating as a FRAD at the user side: Conversion of Frame Relay to async. PRIVATE DATA NETWORK...

  • Page 11: Link Features

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A ETHERNET ETHERNET X.25 OR FRAME RELAY NETWORK BRIDGE BRIDGE TRANSPARENT TRANSPARENT HDLC HDLC X.25 OR FRAME RELAY X.25 OR FRAME RELAY FRADSWITCH-8A FRADSWITCH-8A Figure 2-6. Fradswitch-8A connecting HDLC devices over X.25 or Frame Relay. 2.3 X.25 Link Features When the Fradswitch links are configured for X.25, they operate synchronously at data rates up to 2.15 Mbps.

  • Page 12: Hdlc Link Features

    CHAPTER 2: Introduction The Fradswitch employs a unique funneling method for controlling network congestion and moderating feeder throughput speed. CCLM and LMI management protocols are supported, and operation is in compliance with ANSI T1.606, T1.619, T1.617 Annex D, and ITU Q.922, Annex A. 2.5 HDLC Link Features The Fradswitch links can be programmed to operate with transparent HDLC allowing computers, bridges, and HDLC communication devices to be connected over X.25 or Frame Relay networks.

  • Page 13: Itu Facilities

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A The Fradswitch supports four call-initiation methods, independently selectable for each channel. 1) Manual (regular) call initiation, whereby the user provides all the information required to set up the call by entering an X.28 command. 2) Mnemonic call initiation, whereby the user need only enter a mnemonic (call ID). The channel PAD then retrieves the call-setup information from the Fradswitch’s memory.

  • Page 14: Configuration Features

    CHAPTER 2: Introduction The command facility supports the configuration of both the local and the remote channel PADs. It includes a help function, which provides information on the available PAD commands, and on the purpose and format of each command. The Fradswitch’s command facility can be accessed from any channel, and from any place in the X.25 network.

  • Page 15: Link-Configuration Capabilities

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A For activities that involve repetitive preparation of the same set of parameters, such as channel configuration, profiles, call IDs, etc., the Fradswitch provides a time-saving duplicate function, which allows copying an already-prepared data set as a basis for the preparation of a new set. Another valuable convenience is the display of reports that summarize the existing data for each type of configurable data item.

  • Page 16: Remote System Monitoring

    CHAPTER 2: Introduction • Compression of data stored in the Fradswitch’s nonvolatile memory, to allow maximum use of the available storage capacity. The compression is performed by rearranging the data stored in the memory, to close gaps between data blocks that appear naturally when the stored information is modified. •...
  • Page 17 FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A Total number of frames transmitted and received by layer 1 (the physical layer). Total number of information frames transmitted and received by layer 2 (the link control layer). Total number of information frames transmitted and received by layer 3 (the X.25 layer). Current X.25 synchronization status, and the total number of X.25 synchronization losses.

  • Page 18: Diagnostic Features

    CHAPTER 2: Introduction • LAPB (layer 2) statistics: Total number of I, RR, RNR, REJ, and FRMR frames transmitted and received by layer 2. Number of transmission and reception errors. LAPB state. Current frame size. •X.25 (layer 3) statistics: Total number of I, clear, reset, and restart packets transmitted and received by layer 3. Number of logical group in use.

  • Page 19: Installation

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 3. Installation This chapter provides mechanical and electrical installation procedures for the Fradswitch. The Fradswitch is delivered completely assembled. It’s designed to be installed as a desktop unit or to be mounted in a 19-inch rack. After installing the unit, refer to Chapter 2 of the Packet Switching Guide for system configuration information and procedures.

  • Page 20: Fradswitch Hardware Configuration Information

    CHAPTER 3: Installation Ambient Requirements The ambient operating temperature of the Fradswitch should be 32 to 122°F (0 to 50°C), at a relative humidity of up to 90%, noncondensing. 3.3 Fradswitch Hardware Configuration Information 3.3.1 G ENERAL NFORMATION The Fradswitch contains three different types of printed circuit boards (see Figure 3-1): •...

  • Page 21: Internal Jumpers

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A INTERFACE BOARD EXTENSION BOARD MAIN BOARD I T C Figure 3-1. Fradswitch-8A boards. 3.3.2 I NTERNAL UMPERS WARNING! In order to avoid the possibility of electrical shock, always turn the power switch off and disconnect the power cable from mains before opening the Fradswitch. The Fradswitch has two internal jumpers, designated JP1 and JP2.
  • Page 22 CHAPTER 3: Installation INIT–NOR jumper, JP2 This jumper is used to select the default set of configuration parameters stored in the Fradswitch. The jumper has two positions: NOR Normal operation. The Fradswitch uses the parameters selected by the user during the last configuration session. INIT Initialization.

  • Page 23: Interface Board

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 3.3.3 I NTERFACE OARD The Fradswitch is available with three types of removable interface boards: • V.24 (RS-232) interface for DTE and DCE. • V.35 interface for DTE and DCE. • X.21 interface for DTE. WARNING! In order to a void the possibility of electrical shock, always turn the power switch off and disconnect the power cable from the wall plug before opening the Fradswitch.

  • Page 24: Installation In 19-Inch Racks

    CHAPTER 3: Installation 3.4 Installation in 19-inch Racks The Fradswitch can be installed in 19-inch racks. Unit height is 1U (1.75"). The width of the Fradswitch is slightly less than the available mounting width. An adapter kit provides the hardware necessary for installation of the Fradswitch in 19-inch racks. WARNING! Disconnect the units from AC power while performing the following procedures.

  • Page 25: Cable Connections

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 3.5 Cable Connections The Fradswitch has three connectors located on the rear panel that serve the X.25 links, and RJ-45 connectors located on the front panel for the asynchronous data channels. 3.5.1 A SYNCHRONOUS HANNEL ONNECTIONS Fradswitch channel interfaces are configured as data communication equipment (DCE) interfaces, thereby allowing direct connection, via RS-232 port cables, to data terminal equipment (DTE).

  • Page 26: Power Connection

    CHAPTER 3: Installation 3.5.3 P OWER ONNECTION AC power should be supplied to the Fradswitch through the 5-foot (1.5-m) power cable terminated by a standard 3-prong plug. Connect the cable between the AC mains connector on the Fradswitch’s rear panel and a standard grounded AC outlet.

  • Page 27: Operation

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 4. Operation 4.1 Controls, Indicators, and Connectors Table 4-1 lists the Fradswitch’s front-panel indicators and connectors. The numbers under the heading “Item” refer to the identification numbers in Figure 4-1. 5 6 7 FRADSWITCH-8A MAIN CHANNELS SYNC TEST RESET Figure 4-1.
  • Page 28 CHAPTER 4: Operation Table 4-1. Fradswitch-8A controls, indicators, and connectors (continued) Item Control, Indicator, or Connector Function SYNC Indicator Indicators, one for each main link, indicate Fradswitch synchronization status. Condition Indication Fradswitch not powered. Fradswitch powered and synchronized with the corres- ponding X.25 DTE or DCE peer.
  • Page 29 FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A Table 4-2 lists the functions of the Fradswitch’s rear-panel controls and connectors. The numbers under the heading “Item” refer to the identification numbers in Figure 4-2. MAIN C MAIN B MAIN A POWER 230V/F - 0.2A S.B 115 VAC/F - 0.4A S.B Figure 4-2.

  • Page 30: Operating The Fradswitch

    CHAPTER 4: Operation 4.2 Operating the Fradswitch After being prepared for operation as explained in Section 4.1, the Fradswitch normally operates unattended. Operator intervention is required only when the Fradswitch is set up for the first time or must be adapted to new operational requirements. NOTE Fradswitch configuration is stored in a nonvolatile memory, and is not affected when power is turned off.

  • Page 31: Quick Start

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 5. Quick Start This section provides concise operating instructions for the Fradswitch. Remember that the information appearing in this chapter is intended to help you start using the Fradswitch; it is not a replacement for the detailed operating instructions contained in the Packet Switching Guide. The instructions assume that the Fradswitch is configured in accordance with the factory defaults, explained in Section 1.8 of the Packet Switching Guide.
  • Page 32 CHAPTER 5: Quick Start FRADSWITCH-8A COMMAND PORT REV X.Y ENTER FRADSWITCH-8A PASSWORD: Figure 5-1. Fradswitch-8A opening screen. Enter the password. The factory-default password is a carriage return. The Fradswitch sends the main menu of the command facility (Figure 5-2). MAIN MENU 1) CONFIGURE 2) SYSTEM CONTROL 3) DIAGNOSTICS...

  • Page 33: Basic X.25 Configuration Procedures

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 5.2 Basic X.25 Configuration Procedures The following text describes the configuration procedure for the basic application shown in Figure 5-3. X.25 PAD 8 This configuration includes two X.25 PADs (in this case, ) connected through a Fradswitch to a public X.25 network.

  • Page 34: Fradswitch Routing Table Configuration

    CHAPTER 5: Quick Start • Enter 1 at the “Enter link number to update:” prompt. X.25 PAD 8 • Verify that the X.25 transmission mode is DCE. This section assumes that your matching is configured as DTE. • Repeat the above procedure for link 3. •...

  • Page 35: Stm Protocol

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A • On the Fradswitch system control menu, select 9 (Reset), and enter “y” at the “Are you sure (y/n):” prompt. After doing all of the above, the routing table will be shown as in Figure 5-4. ADDRESS DESTINATION LINK 1234567890120X LOCAL...

  • Page 36: Weight-Oriented Routing Function

    CHAPTER 5: Quick Start The STM Async Channels are numbered according to the link number: For link number 1, in Stat-8, they are numbered 101—108. For link number 1, in Stat-24, they are numbered 101—124. For link number 2, in Stat-8, they are numbered 201—208. For link number 2, in Stat-24, they are numbered 201—224.
  • Page 37 FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 1) Link ..#no 6) Link prio ..#p 2) Link ..#no 7) Link prio ..#p 3) Link ..#no 8) Link prio ..#p 4) Address ..[] 5) Stop search ..[] S) Save CR) Exit The “stop search” field lets you limit the address match search, so you can define more than three routing options to a given set of addresses.
  • Page 38 CHAPTER 5: Quick Start 1) Link ..5 6) Link prio ..1 2) Link ..6 7) Link prio ..1 3) Link ..7 8) Link prio ..1 4) Address ..[1234567XX] 5) Stop search ..[1] S) Save CR) Exit 1) Link ..8 6) Link prio ..1 2) Link ..9 7) Link prio ..2 3) Link ..10...

  • Page 39: Management Procedures

    FRADSWITCH-8A, FRADSWITCH-16A, FRADSWITCH-24A 5.5 Management Procedures All of the management procedures described below are started by entering a command when the channel is in the command mode. Recalling the PAD If the channel is in the command mode, you can see the PAD prompt on the monitor of your data equipment.
  • Page 40 CHAPTER 5: Quick Start Mnemonic Call If the same destination is often used, it can be called by a mnemonic call, provided the call-initiation information has been defined by means of the Call ID function (see Chapter 2 in the Packet Switching Guide). To use the mnemonic call initiation command, type C, the mnemonic, and then press the <CR>...
  • Page 41 NOTES...
  • Page 42 © Copyright 1995. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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