Patton electronics SMARTNODE 4900 User Manual

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SmartNode 4900
IpChannel Bank

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Sales Office:
+1 (301) 975-1000
Technical Support:
+1 (301) 975-1007
E-mail: support@patton.com
WWW: www.patton.com
Part Number: 07MSN4900-GS, Rev. I
Revised: June 22, 2012

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Summary of Contents for Patton electronics SMARTNODE 4900

  • Page 1: User Manual

    For Quick Start Installation SmartNode 4900 IpChannel Bank User Manual Sales Office: +1 (301) 975-1000 Technical Support: +1 (301) 975-1007 E-mail: support@patton.com WWW: www.patton.com Part Number: 07MSN4900-GS, Rev. I Revised: June 22, 2012...
  • Page 2 Patton Electronics Company, Inc. 7622 Rickenbacker Drive Gaithersburg, MD 20879 USA Tel: +1 (301) 975-1000 Fax: +1 (301) 869-9293 Support: +1 (301) 975-1007 Web: www.patton.com E-mail: support@patton.com Trademark Statement The terms SmartNode, SmartWare, and SmartView are trademarks of Patton Electronics Company. All other trademarks presented in this document are the prop- erty of their respective owners.
  • Page 3: Summary Table Of Contents

    Summary Table of Contents General information ............................15 Applications overview............................ 21 Hardware installation............................ 24 Getting started with the SmartNode 4900 Series................... 36 LEDs status and monitoring ......................... 46 Contacting Patton for assistance ........................48 Compliance information ..........................51 Specifications ..............................55 Port pin-outs ..............................
  • Page 4: Table Of Contents

    Table of Contents Summary Table of Contents ........................... 3 Table of Contents ............................4 List of Figures ..............................8 List of Tables ..............................9 About this guide ............................10 Audience................................10 Structure................................10 Precautions ................................11 Safety when working with electricity Preventing Electrostatic Discharge Damage ....................13 General observations...
  • Page 5 SmartNode 4900 User Manual Table of Contents Connecting cables ............................29 Connecting the FXS ports .........................29 Connecting the FXO ports ........................29 Connecting the Ethernet ports ........................30 Connecting the 10/100Base-T Ethernet ports to an Ethernet switch or hub ........30 Connecting a 10/100Base-T Ethernet port to an Ethernet-capable workstation ........31...
  • Page 6 SmartNode 4900 User Manual Table of Contents Safety compliance: ............................52 PSTN Regulatory Compliance: ........................52 Radio and TV interference (FCC Part 15)......................52 CE Declaration of Conformity ..........................52 Authorized European Representative ........................52 FCC Part 68 (ACTA) Statement (FXO ports).......................54 Industry Canada Notice (FXO Ports) ........................54...
  • Page 7 SmartNode 4900 User Manual Table of Contents End User License Agreement ..........................71 1. Definitions ..............................71 2. Title ................................71 3. Term ................................71 4. Grant of License ............................71 5. Warranty ..............................71 6. Termination ..............................72 7. Other licenses .............................72 Installation checklist ............................ 73 Introduction ................................74...
  • Page 8: List Of Figures

    List of Figures Model SN4932 IpChannel Bank ............16 Model SN4932 IpChannel Bank front panel LEDs.
  • Page 9: List Of Tables

    List of Tables General conventions ..............14 Front panel LEDs .
  • Page 10: About This Guide

    About this guide This guide describes the SmartNode 4900 Series IpChannel Bank hardware, installation and basic configura- tion. For detailed software configuration information refer to the SmartWare Software Configuration Guide and the available Configuration Notes. Audience This guide is intended for the following users: •...
  • Page 11: Precautions

    SmartNode 4900 User Manual About this guide Precautions Notes, cautions, and warnings, which have the following meanings, are used throughout this guide to help you become aware of potential problems. are intended to prevent safety hazards that could result in per- sonal injury.
  • Page 12: Safety When Working With Electricity

    SmartNode 4900 User Manual About this guide Safety when working with electricity The SmartNode contains no user serviceable parts. The equipment shall be returned to Patton Electronics for repairs, or repaired by qualified service per- WARNING sonnel. Opening the SmartNode case will void the warranty.
  • Page 13: Preventing Electrostatic Discharge Damage

    SmartNode 4900 User Manual About this guide Preventing Electrostatic Discharge Damage When starting to install interface cards place the interface card on its shielded plastic bag if you lay it on your bench. Electrostatic Discharge (ESD) can damage equipment and impair electrical circuitry. It occurs when electronic printed circuit cards are improperly handled and can result in complete or intermittent failures.
  • Page 14: Typographical Conventions Used In This Document

    SmartNode 4900 User Manual About this guide Typographical conventions used in this document This section describes the typographical conventions and terms used in this guide. General conventions The procedures described in this manual use the following text conventions: Table 1. General conventions...
  • Page 15: General Information

    Chapter 1 General information Chapter contents SmartNode 4900 Series overview...........................16 SmartNode 4900 Series detailed description......................17 SmartNode 4900 Series front panel ........................18 SmartNode 4900 Series rear panels .........................19 Reset button behavior ..........................20...
  • Page 16: Smartnode 4900 Series Overview

    SmartNode 4900 User Manual 1 • General information SmartNode 4900 Series overview The IpChannel Bank 4900 Series are Analog Access Routers that support 12 to 32 VoIP calls. Filling the gap between small media gateways and T1/E1 gateway equipment, the SN4900 Series IpChannel Bank fits your needs cost effectively—so you won’t have to “stack”...
  • Page 17: Smartnode 4900 Series Detailed Description

    SmartNode 4900 User Manual 1 • General information SmartNode 4900 Series detailed description The SmartNode 4900 Series IpChannel Bank provides VoIP calling from 12 to 32 analog phone lines. Inte- grated within the IpChannel Bank are 2 Ethernet ports, one for LAN, the other for WAN connectivity. The WAN service connection may also be made via either a serial V.35 or X.21 port.
  • Page 18: Smartnode 4900 Series Front Panel

    SmartNode 4900 User Manual 1 • General information SmartNode 4900 Series front panel The front panel LEDs display the status of the power, system, VOIP channels, Ethernet ports, and call load. The front panel includes the following LEDs. Figure 2...
  • Page 19: Smartnode 4900 Series Rear Panels

    SmartNode 4900 User Manual 1 • General information SmartNode 4900 Series rear panels The SmartNode 4900 rear panel ports are shown in figure 3 and described in table 3 on page 20. Model SN4932 0 -2 0 -6 4 :1...
  • Page 20: Reset Button Behavior

    SmartNode 4900 User Manual 1 • General information Table 3. Port descriptions Port Description ETH 0/0 (WAN Ethernet 0/0 port) 10/100Base-Tx full-/half-duplex, RJ-45, auto detection and auto- MDI-X connects the unit to an Ethernet WAN device (for example, a cable modem, DSL modem, or fiber modem).
  • Page 21: Applications Overview

    Chapter 2 Applications overview Chapter contents Introduction ................................22 SmartNode 4900 Series applications........................22 Multiservice carrier access over leased lines ......................22 Enterprise FXS concentration and extension over IP and T1/E1 ..............23 Bulk analog line extensions ..........................23...
  • Page 22: Introduction

    SmartNode 4900 User Manual 2 • Applications overview Introduction Patton's SmartNode 4900 Series deliver the features you need for advanced multiservice voice and data net- working. SmartNode 4900 Series combine high-quality voice-over-IP with powerful quality of service routing features to deliver seamlessly integrated VoIP and data access over synchronous serial leased lines. This chapter describes typical applications for which the SmartNode 4900 Series series is uniquely suited.
  • Page 23: Enterprise Fxs Concentration And Extension Over Ip And

    SmartNode 4900 User Manual 2 • Applications overview Like all members of the SmartNode family of VoIP solutions, the SmartNode 4900 Series supports all indus- try-standard VoIP signaling protocols, including SIP, H.323, T.38 fax-relay, plus fax- and modem-bypass. The SmartNode 4900 is interoperable with leading softswitches and VoIP servers...
  • Page 24: Hardware Installation

    Chapter 3 Hardware installation Chapter contents Introduction ................................25 Planning the installation............................25 Installation checklist ............................26 Site log ................................26 Network information ............................27 Network diagram ............................27 IP related information ..........................27 Configuration tools ............................27 AC Power Mains .............................27 Location and mounting requirements ......................28 Installing the IpChannel Bank..........................28 Unpacking the Model SN4900 series IpChannel Bank ...................28...
  • Page 25: Introduction

    SmartNode 4900 User Manual 3 • Hardware installation Introduction This chapter contains information for planning the installation of the SmartNode 4900 IpChannel Bank with the following installation procedures: • Section “Unpacking the Model SN4900 series IpChannel Bank” on page 28 lists the contents of the ship- ping box •...
  • Page 26: Installation Checklist

    SmartNode 4900 User Manual 3 • Hardware installation Installation checklist The installation checklist (see table 5) lists the tasks for installing a SmartNode 4900 Series IpChannel Bank. Make a copy of this checklist and mark the entries as you complete each task. For each SmartNode 4900, include a copy of the completed checklist in your site log.
  • Page 27: Network Information

    SmartNode 4900 User Manual 3 • Hardware installation Network information When planning your installation there are certain critical considerations for the network connections. The fol- lowing sections describe such considerations for several types of network interfaces. Network diagram Draw a network overview diagram that displays all neighboring IP nodes, connected elements and telephony components.
  • Page 28: Location And Mounting Requirements

    SmartNode 4900 User Manual 3 • Hardware installation Note When setting up your SmartNode you must consider cable-length limitations and potential electromagnetic interference (EMI) as defined by the applicable local and international regulations. Ensure that your site is properly prepared before beginning installation.
  • Page 29: Connecting Cables

    SmartNode 4900 User Manual 3 • Hardware installation 6. Secure the IpChannel Bank in position with the mounting screws. 7. Go to section “Connecting cables” on page 29 Connecting cables This section describes installing the interface, power, and ground cables in the following order:...
  • Page 30: Connecting The Ethernet Ports

    SmartNode 4900 User Manual 3 • Hardware installation 3. Select and attach the appropriate twisted-pair from each FXS device on punch-down blocks for connection to the chosen port on the IpChannel Bank. Connecting the Ethernet ports The IpChannel Bank has dual 10/100 Ethernet interfaces. One is for the WAN connection. The other is for connecting to your Ethernet LAN.
  • Page 31: Connecting A 10/100Base-T Ethernet Port To An Ethernet-Capable Workstation

    SmartNode 4900 User Manual 3 • Hardware installation Connecting a 10/100Base-T Ethernet port to an Ethernet-capable workstation. The 10/100Base-T Ether- net ports can connect to a single Ethernet-capable workstation or PC by means of any Ethernet cable. Connecting the EIA-561 RS-232 configuration port (DCE configured)
  • Page 32: Connecting Power

    SmartNode 4900 User Manual 3 • Hardware installation Table 8. Serial port pin-outs V.35 Interface (DB-25) X.21 interface (DB-15) XTC-a (to DCE) Note Some NTUs have non-standard connections and require special cables. Consult the NTU maker’s product documentation Connecting power In connecting to the power source, it is important to establish a good grounding connection first, then the power connection.
  • Page 33: Installing The Power Cables-Ac Units

    SmartNode 4900 User Manual 3 • Hardware installation Mains Voltage: Do not open the case when either power cord is attached. The SmartNode router is equipped with dual power supplies. Disconnect both power supply cords before servicing. For systems without a power switch,...
  • Page 34: Installing The Power Cables-Dc Units

    SmartNode 4900 User Manual 3 • Hardware installation 3. Repeat steps to install the remaining power cable. 4. Verify that the AC power cord included with your IpChannel Bank is compatible with local standards. If it is not, refer to chapter 6, “Contacting Patton for assistance”...
  • Page 35 SmartNode 4900 User Manual 3 • Hardware installation 3. Insert the stripped end of the positive lead into the +DC input of the terminal block. Tighten the screw until the power lead is firmly fastened. Repeat the procedure for the negative lead, using the -DC input of the terminal block.
  • Page 36: Getting Started With The Smartnode 4900 Series

    Chapter 4 Getting started with the SmartNode 4900 Series Chapter contents Introduction ................................37 1. Configure IP address ............................38 Factory-default IP settings ..........................38 Connect to the RS-232 console port .......................39 Login ................................40 Changing the WAN IP address ........................40 2. Connecting the SmartNode to the network .......................41 3.
  • Page 37: Introduction

    SmartNode 4900 User Manual 4 • Getting started with the SmartNode 4900 Series Introduction This chapter leads you through the basic steps to set up a new SmartNode and to download a configuration. Setting up a new SmartNode consists of the following main steps:...
  • Page 38: Configure Ip Address

    SmartNode 4900 User Manual 4 • Getting started with the SmartNode 4900 Series 3. Loading the configuration (see figure 16). Refer to section “2. Connecting the SmartNode to the net- work” on page 41 for details. 0 -2 0 -6...
  • Page 39: Connect To The Rs-232 Console Port

    SmartNode 4900 User Manual 4 • Getting started with the SmartNode 4900 Series Connect to the RS-232 console port The RJ-45 Console port is wired as an EIA-561, RS-232 port. Use the included Model 16F-561 adapter and cable (see figure 17) between the SmartNode’s Console port and a PC or workstation’s RS-232 serial interface.
  • Page 40: Login

    SmartNode 4900 User Manual 4 • Getting started with the SmartNode 4900 Series Login To access the SmartNode, start the Telnet application. Type the default IP address for the router into the address field: 192.168.1.1. Accessing your SmartNode via a Telnet session displays the login screen. Type the factory default login: administrator and leave the password empty.
  • Page 41: Connecting The Smartnode To The Network

    SmartNode 4900 User Manual 4 • Getting started with the SmartNode 4900 Series 2. Connecting the SmartNode to the network In general, the SmartNode will connect to the network via the ETH 0/0 (WAN) port. This enables the SmartNode to offer routing services to the PC hosts on the ETH 0/1 (LAN) port. The SmartNode 4900 Series...
  • Page 42: Bootloader

    SmartNode 4900 User Manual 4 • Getting started with the SmartNode 4900 Series Note If your application is unique and not covered by any of Patton’s configura- tion templates, you can manually configure the SmartNode instead of load- ing a configuration file template. In that case, refer to the SmartNode Series SmartWare Software Configuration Guide for information on configuring the SmartNode device.
  • Page 43: Start-Up With Factory Configuration

    SmartNode 4900 User Manual 4 • Getting started with the SmartNode 4900 Series Start-up with factory configuration Step Command Purpose RedBoot> fis load Copies the SmartWare application image from the persistent memory (flash:) to the volatile memory (RAM) from where it will be executed.
  • Page 44 SmartNode 4900 User Manual 4 • Getting started with the SmartNode 4900 Series Step Command Purpose RedBoot> go Starts the application image that was down- loaded into the volatile memory (RAM). Note With the Bootloader, only the Ethernet interface 0/0 is available. The Boot- loader applies the IP address, subnet mask, and default gateway that were last configured by the Bootloader itself or by another application (e.g.
  • Page 45: Load A New Application Image (Smartware) Via The Serial Link

    SmartNode 4900 User Manual 4 • Getting started with the SmartNode 4900 Series Load a new application image (SmartWare) via the serial link The Bootloader supports the ‘X-Modem’ and ‘Y-Modem’ protocols to download application images via the serial link of the console. Do the following to initiate the download:...
  • Page 46: Leds Status And Monitoring

    Chapter 5 LEDs status and monitoring Chapter contents Status LEDs................................47...
  • Page 47: Status Leds

    SmartNode 4900 User Manual 5 • LEDs status and monitoring Status LEDs The front panel LEDs display the status of the power, system, VoIP channels, Ethernet ports, and call load. They are described in table 10. Rear panel serial port LEDs are described in table Table 10.
  • Page 48: Contacting Patton For Assistance

    Chapter 6 Contacting Patton for assistance Chapter contents Introduction ................................49 Contact information..............................49 Warranty Service and Returned Merchandise Authorizations (RMAs)..............49 Warranty coverage ............................49 Out-of-warranty service ..........................50 Returns for credit ............................50 Return for credit policy ..........................50 RMA numbers ..............................50 Shipping instructions ..........................50...
  • Page 49: Introduction

    SmartNode 4900 User Manual 6 • Contacting Patton for assistance Introduction This chapter contains the following information: • “Contact information”—describes how to contact Patton technical support for assistance. • “Warranty Service and Returned Merchandise Authorizations (RMAs)”—contains information about the SmartNode warranty and obtaining a return merchandise authorization (RMA).
  • Page 50: Out-Of-Warranty Service

    SmartNode 4900 User Manual 6 • Contacting Patton for assistance Out-of-warranty service Patton services what we sell, no matter how you acquired it, including malfunctioning products that are no longer under warranty. Our products have a flat fee for repairs. Units damaged by lightning or other catastro- phes may require replacement.
  • Page 51 Appendix A Compliance information Chapter contents Compliance ................................52 EMC compliance: ............................52 Safety compliance: ............................52 PSTN Regulatory Compliance: ........................52 Radio and TV interference (FCC Part 15)......................52 CE Declaration of Conformity ..........................52 Authorized European Representative ........................52 FCC Part 68 (ACTA) Statement (FXO ports).......................54 Industry Canada Notice (FXO Ports) ........................54...
  • Page 52: A Compliance Information

    SmartNode 4900 User Manual A • Compliance information Compliance EMC compliance: • FCC Part 15, Class A • EN55022, Class A • EN55024 Safety compliance: • UL60950-1/CSA C22.2 No. 60950-1 • IEC/EN 60950-1 • AS/NZS 60950-1 PSTN Regulatory Compliance: •...
  • Page 53 SmartNode 4900 User Manual A • Compliance information Watchfield, Swindon, Wilts SN6 8TD, UK Authorized European Representative...
  • Page 54: Fcc Part 68 (Acta) Statement (Fxo Ports)

    SmartNode 4900 User Manual A • Compliance information FCC Part 68 (ACTA) Statement (FXO ports) This equipment complies with Part 68 of FCC rules and the requirements adopted by ACTA. On the bottom side of this equipment is a label that contains—among other information—a product identifier in the format US: AAAEQ##TXXXX.
  • Page 55 Appendix B Specifications Chapter contents Voice connectivity - FXS ............................55 Voice connectivity - FXO............................55 Ethernet interface ..............................55 Console port................................55 Serial ports................................55 FXS ports ................................56 FXO ports ................................56 PPP and Frame-Relay support ..........................56 Voice processing (signaling dependent) .........................56 Fax and modem support............................56 Voice signaling ..............................57...
  • Page 56: B Specifications

    SmartNode 4900 User Manual B • Specifications Voice connectivity - FXS 2-wire Loopstart, RJ-11/12 Short haul loop 1.1 km @3REN EuroPOTS (ETSI EG201 188) Programmable AC impedance, feeding, and ring voltage; on-hook voltage 48 VDC Caller-ID Type-1 FSK and ITU V.23/Bell 202 generation...
  • Page 57: Fxs Ports

    SmartNode 4900 User Manual B • Specifications FXS ports The FXS ports provide for connection of up to 32 analog FXS devices on a 50- or 64-pin RJ-21X connector located on the rear panel. FXO ports The FXO ports provide for connection of up to 32 analog FXO devices on a 50- or 64-pin RJ-21X connector located on the rear panel.
  • Page 58: Voice Signaling

    SmartNode 4900 User Manual B • Specifications Fax over IP (FoIP) T.38 Fax relay (9.6 k, 14.4 k) Voice signaling H.323v4: • RAS, H.225, H.245 • Fast-connect, early H.245 • Gatekeeper autodiscovery • Alias registration • Overlap sending • Empty capability set (call transfer, hold) •...
  • Page 59: Management

    SmartNode 4900 User Manual B • Specifications 802.1p VLAN tagging IPSEC AH & ESP Modes Manual Key; IKE optional AES/DES/3DES Encryption Management Industry standard CLI with local console (RJ-45, RS-232) and remote Telnet access TFTP configuration & firmware loading SNMP v1 agent (MIB II and private MIB)
  • Page 60: Power Supply

    SmartNode 4900 User Manual B • Specifications Table 12. SmartNode weight and maximum power specifications SmartNode model Weight Maximum power dissipation IpChannel Bank 4932 9.1 lb (4.1 kg) V.35 or X.21 Serial Card (Expansion Port) 0.1 lb (45.3 g) Power supply Universal AC version Internal power supply voltage range 100–240 VAC, 50/60 Hz via IEC-320 connectors.
  • Page 61 Appendix C Port pin-outs Chapter contents Introduction ................................61 Console port................................61 Ethernet 10Base-T and 100Base-T port ........................61 Sync Serial port ..............................62 FXS and FXO ports...............................63...
  • Page 62: C Port Pin-Outs

    SmartNode 4900 User Manual C • Port pin-outs Introduction This section provides pin-out information for the ports of the SmartNode. Console port Configuration settings: Asynchronous data rate of 9600 bps, 2 bits, no parity, 1 stop bit, no flow control...
  • Page 63: Sync Serial Port

    SmartNode 4900 User Manual C • Port pin-outs Sync Serial port Two types of serial ports are available: V.35 or X.21. They are configured as DTE. The V.35 is presented on a DB-25 female connector (see table 14 for pin-outs). The X.21 is presented on a DB-15 female connector (see table 15 for pin-outs).
  • Page 64: Fxs And Fxo Ports

    SmartNode 4900 User Manual C • Port pin-outs FXS and FXO ports The FXS and FXO ports are accessed through a 64-pin RJ-21X connector (see table 16 for pin-outs) or through a 50-pin RJ-21X connector (see table 17 on page 66 for pin-outs) located on the rear panel of the IpChannel Bank.
  • Page 65 SmartNode 4900 User Manual C • Port pin-outs Table 16. Band marked color-codes for the 64-pin RJ-21X connector (Continued) Wire/Color Code 64 Pin Binder Color Tip & Ring Pair Number Positions Main color Stripe Tip 17 Yellow Orange Blue Pair 17...
  • Page 66: Band Marked Color-Codes For The 50-Pin Rj-21X Connector

    SmartNode 4900 User Manual C • Port pin-outs Table 17. Band marked color-codes for the 50-pin RJ-21X connector Wire/Color Code 50 Pin Tip & Ring Pair Number Positions Main color Stripe Tip 1 White Blue Pair 1 Blue White Ring 1...
  • Page 67 SmartNode 4900 User Manual C • Port pin-outs Table 17. Band marked color-codes for the 50-pin RJ-21X connector (Continued) Wire/Color Code 50 Pin Tip & Ring Pair Number Positions Main color Stripe Tip 19 Yellow Brown Pair 19 Brown Yellow...
  • Page 68: Factory Configuration

    Appendix D Factory Configuration Chapter contents Introduction ................................68...
  • Page 69: Introduction

    SmartNode 4900 User Manual D • Factory Configuration Introduction The factory configuration settings for SmartNode 4900 Series devices are as follows: #----------------------------------------------------------------# # 4900 Series # Factory configuration file #----------------------------------------------------------------# dns-relay sntp-client sntp-client server primary 129.132.2.21 port 123 version 4...
  • Page 70: E End User License Agreement

    Appendix E End user license agreement Chapter contents End User License Agreement ..........................70 1. Definitions ..............................70 2. Title ................................70 3. Term ................................70 4. Grant of License ............................70 5. Warranty ..............................70 6. Termination ..............................71 7. Other licenses .............................71...
  • Page 71: End User License Agreement

    SmartNode 4900 User Manual E • End user license agreement End User License Agreement By opening this package, operating the Designated Equipment or downloading the Program(s) electronically, the End User agrees to the following conditions: 1. Definitions Effective Date shall mean the earliest date of purchase or download of a product containing the Patton Electronics Company Program(s) or the Program(s) themselves.
  • Page 72: Termination

    SmartNode 4900 User Manual E • End user license agreement If the Program(s) are acquired by or on behalf of a unit or agency of the United States Government, the Gov- ernment agrees that such Program(s) are commercial computer software or computer software documentation and that, absent a written agreement to the contrary, the Government’s rights with respect to such Program(s) are...
  • Page 73: Installation Checklist

    Appendix F Installation checklist Chapter contents Introduction ................................73...
  • Page 74: Introduction

    SmartNode 4900 User Manual F • Installation checklist Introduction This appendix lists the tasks for installing a SmartNode 4900 IpChannel Bank (see table 18). Make a copy of this checklist and mark the entries as you complete each task. For each IpChannel Bank, include a copy of the completed checklist in your site log.
  • Page 75: Accessories

    Appendix G Accessories Chapter contents Introduction ................................75...
  • Page 76: Introduction

    SmartNode 4900 User Manual G • Accessories Introduction The cables listed in table 19 are available as accessories for the SmartNode 4900 Series products. Table 19. Accessory cables Description Part Number DB-25 male to M/34 male cable (Sync serial V.35 port) 1205-25M/35M DB-15 male to DB-15 male cable (Sync serial X.21 port)

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