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Multitech MultiVOIP 100 MVP110 User Manual

Voice/fax over ip networks h.323 mode
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Voice/Fax Over IP Networks
Model MVP110
H.323 Mode
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  • Page 1 Voice/Fax Over IP Networks Model MVP110 H.323 Mode User Guide...
  • Page 2 Furthermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of Multi-Tech Systems, Inc. to notify any person or organization of such revisions or changes.

  • Page 3: Table Of Contents

    Chapter 1 - Introduction and Description ... 5 Introduction ... 6 Preview of this Guide ... 7 Typical Application ... 8 Front Panel Description ... 13 Back Panel Description ... 14 Power Connector ... 14 Command Connector ... 14 Ethernet Connector ... 14 Phone Connector ...
  • Page 4 Viewing Statistics ... 55 IP Statistics ... 55 SNMP Statistics ... 56 Viewing Logs ... 56 Viewing Log Entry Details ... 57 Viewing Channel Totals ... 57 Reports ... 58 Upgrade Procedures ... 59 Upgrade Software ... 59 Chapter 5 - Remote Configuration ... 62 Introduction ...

  • Page 5: Chapter 1 - Introduction And Description

    Chapter 1 - Introduction and Description...

  • Page 6: Introduction

    Chapter 1 - Introduction and Description Introduction Welcome to Multi-Tech's new voice/fax gateway, the MultiVOIP, model MVP110. The MVP110 allows analog voice and fax communication over a traditional data communications/data networking digital Internet. Multi-Tech’s new voice/fax gateway technology allows voice and fax communication to be transmitted, with no additional expense, over your existing communications Internet, which has traditionally been data-only.

  • Page 7: Preview Of This Guide

    MVP110 at the factory, a statement of the limited warranty, information about our Internet presence, and space for recording information about your MVP110 prior to calling Multi-Tech’s Technical Support. Chapter 1 - Introduction and Description...

  • Page 8: Typical Application

    Ethernet connection is plugged into the hub on the data network. The data network is connected via a router to the Internet. In our typical application, a user at the corporate office picks up a telephone connected to their local telephone switch (PBX) and calls the remote branch office by dialing extension 4124 on the corporate MultiVOIP.
  • Page 9 For your corporate MultiVOIP, the Ethernet Frame Type is Type II, the IP Address is 169.254.26.12, the Subnet Mask Address is 255.255.255.128, and the router Gateway Address is 201.22.122.1. The remote branch office would have the same Frame Type, a LAN IP address of 206.25.124.120 and a Gateway Address of 206.25.124.110.
  • Page 10 Chapter 1 - Introduction and Description or are you going to control your call sessions using the proprietary phone book. The H.323 Gatekeeper acts as the central point for all calls within its zone and provides call control services to registered endpoints.
  • Page 11 Chapter 1 - Introduction and Description The H323 ID assigned to this phone number identifies the office that is using this extension. The IP Address of the Corporate MultiVOIP is 201.022.122.118 and the default port number 1720 is used. Once the MultiVOIP goes online, the Gatekeeper registers it with the above H.323 ID. No other H323 endpoint can use this H.323 ID.
  • Page 12 Chapter 1 - Introduction and Description The proprietary data base would then appear as in the following dialog box and when the remote branch office MultiVOIP is turned on, the current data base would be downloaded to the remote branch office MultiVOIP.

  • Page 13: Front Panel Description

    Chapter 1 - Introduction and Description Front Panel Description The MVP110 front panel has three groups of LEDs that provide the status of the Ethernet connection (Ethernet), the Voice/Fax channel, and an LED for boot status. The front panel is shown below and a description of each LED follows.

  • Page 14: Back Panel Description

    Chapter 1 - Introduction and Description Back Panel Description The cable connections for the MVP110 are made at the back panel. Connectors include Power, Command Port (RJ-45), Ethernet, and Voice/Fax Channel. The cable connectors are shown in Figure 1-5 and defined in the following groups. Figure 1-5.

  • Page 15: Specifications

    Specifications • One 4 MB DRAM (1 Meg by 32-bit, 70 nanosecond SIMM) Caution: SIMM speed and size cannot be mixed • Two Megabytes of flash memory Ethernet Port • Single Ethernet Interface - 10Base-T (twisted pair) keyed RJ-45 connector. Command Port •...

  • Page 16: Chapter 2 - Installation

    Chapter 2 - Installation...

  • Page 17: Installing Your Mvp110

    Installing Your MVP110 The basic steps of installing your MVP110 network involve unpacking the units, connecting the cables, and configuring the units using management software (MVP110 Configuration). This process results in a fully functional Voice Over IP network. A general description is provided below and detailed instructions are provided in Installing and Configuring Your MVP110 The VOIP administrator must first install the MVP110 software and then configure each MVP110 for...

  • Page 18: Unpacking Your Mvp110

    When the battery starts to weaken, the date and time may be incorrect. If the battery fails, the board must be sent back to Multi-Tech Systems for battery replacement. The FXS and Ethernet ports are not designed to be connected to a Public Telecommunication Network.

  • Page 19: Cabling Your Mvp110

    Cabling Your MVP110 Cabling your MVP110 involves making the proper Power, Command Port, and Internet connections. Figure 2-2 shows the back panel connectors and the associated cable connections. The Cabling Procedure section provides step-by-step instructions for cabling your MVP110. Cabling Procedure 1.

  • Page 20: Chapter 3 - Software Loading And Configuration

    Chapter 3 - Software Loading and Configuration...

  • Page 21: Installing Your Mvp110 Software

    2. Insert the MVP110 CD into a CD-ROM drive. The CD is auto-detectable, so it starts automatically. It may take 10 to 20 seconds for the Multi-Tech Installation CD window to appear. If the Multi-Tech Installation CD window does not appear automatically, click My Computer, then right-click the CD-ROM drive icon, click Open, then click the Autorun icon.
  • Page 22 4. The MVP110 Setup welcome dialog box displays. Press Enter or click Next to continue. 5. The Choose Destination Location dialog box displays. Follow the on-screen instructions. You can either choose the Destination Location of your MVP110 software or select the default destination by clicking Next.
  • Page 23 of the MVP110. From the Select Port list, choose the COM port of your PC. Click OK to continue. 8. The Setup Complete dialog displays. Click Finish to continue. 9. The following message displays: Click Yes to continue. 10. The following message displays. Click Yes to continue.

  • Page 24: Configuring Your Mvp110

    Configuring Your MVP110 The following steps provide instructions for configuring your MVP110. The configuration sequence includes IP Protocol default setup, Channel setup, and Phone Directory Database setup. The Phone Directory Database setup is configured differently depending on whether or not the Gatekeeper function is available and enabled on the Phone Directory Database dialog box.
  • Page 25 When the DTMF Out of Band check box is selected, the unit reproduces the DTMF tones instead of passing them through. Note: Only change the DTMF gain under the direction of Multi-Tech Technical Support. 17. To change the voice coder, select the Manual option in the Coder group. Select the appropriate coder from the Selected Coder list.
  • Page 26 silence is detected, thereby reducing the amount of network bandwidth that is being used by the voice channel. If Echo Cancellation is enabled, the MVP110 will remove echo which improves the quality of sound. The Forward Error Correction (FEC) feature allows some of the voice packets that were corrupted or lost to be recovered.
  • Page 27 of the jitter buffer directly effects the voice delay between MVP110 gateways. The Minimum Jitter Value default setting is 150 milliseconds, the Maximum Jitter Value default setting is 300 milliseconds, and the Optimization Factor default setting is 7. If your country/region is not the default USA, click the Regional tab and proceed to step 25; otherwise, proceed to step 26 to begin building your phone directory database.

  • Page 28: Registering With A Gatekeeper Phone Directory

    Registering with a Gatekeeper Phone Directory This section describes how to register H.323 endpoints with the Gatekeeper. The H.323 Gatekeeper function resides at a PC acting as the central point for all calls within its zone and providing call control services to registered endpoints. The Gatekeeper performs two important call control functions: address translation from LAN aliases to IP addresses, and bandwidth management where the network manager has specified a threshold for the number of simultaneous conferences on the LAN.
  • Page 29 33. Leave the Description box blank. 34. Enter the Voice Channel number corresponding to the phone number entered. 35. Fill in the H.323 ID box with a description to identify the phone number. For this example, you could enter “New York Office”. 36.

  • Page 30: Building A Proprietary Phonebook Directory

    Building a Proprietary Phonebook Directory 27. To build your proprietary MVP110 Phone Directory (in an H.323 environment without the Gatekeeper option enabled), you will first need to select the Proprietary Phonebook option and then configure the “Master” MVP110 and then the “Slave” MVP110s (or other H.323 endpoints). Configuring the “Slave”...
  • Page 31 30. The Description box is optional, but can be useful in associating the channel to the extension. If you wish, enter a description of your local phone number. This description serves to identify the phone number you entered in the previous step. Normally the “Master” MVP110 resides at the entity’s main office;...
  • Page 32 34. Enter the phone number for the MultiVOIP in the Station Information group Phone Number box. 35. Click inside the Description box and enter a description for the remote MVP110 phone number for the Voice/Fax Channel. 36. In the Station Identification group, select HUNT GROUP #2 from the Hunt Group list, enter the London Office’s IP Address (202.056.039.100), and accept the H.323 industry standard Port value (1720) used to communicate with other H.323 endpoints.
  • Page 33 42. Click OK and you are returned to the Phone Directory Database dialog box which now includes the stand-alone phone number and related information in the Phone Number list. 43. When you have finished, click OK to download the setup configuration to the MVP110. 44.

  • Page 34: Configuring Your Slave Mvp110S

    Configuring Your Slave MVP110s If the Proprietary Phonebook option on the Phone Directory Database dialog box was enabled, then you will need to configure all remote H.323 endpoints as “Slave” units. For example, the MVP110 at the company’s subsidiary office in London would need to be configured as a “Slave.” CAUTION: If you are installing a MVP110 behind a Firewall, the Firewall must support H.323.
  • Page 35 The IP Address is the unique IP address that you assign to the MVP110, and the Gateway Address is the IP address of the device (such as a network router) connected to the Internet/ Intranet. Click OK when you are finished. The Main menu displays.
  • Page 36 DTMF tone pair. Make your selections in the lists in the DTMF Gain group. Note: Only change the DTMF gain under the direction of Multi-Tech Technical Support. 9. To change the voice coder, select the Manual in the Coder group. Select the appropriate coder from the Selected Coder list.
  • Page 37 12. If you want to dedicate a local voice/fax channel to a remote voice/fax channel (so you will not have to dial the remote channel), click the Auto Call Enable option in the Auto Call group. Then enter the phone number of the remote MVP110 in the Phone Number box. 13.
  • Page 38 Note: In a Dial-On-Demand (DOD) network, you should leave Send Status Report to Master disabled. This allows the router to disconnect whenever there is no voice activity. Note that Slaves with Send Status Report to Master disabled will show up as “Unknown” when viewing Slave status on the Master.

  • Page 39: Deploying The Voip Network

    Deploying the VOIP Network For a Proprietary Phone Directory database, the VOIP administrator can deploy the pre-configured slave MVP110s to their remote sites. The remote site administrators need only connect power to the pre-configured MVP110, connect the MVP110 to their Ethernet LAN and predefined telephone equipment, and then wait for the phone directory database to be downloaded.

  • Page 40: Chapter 4 - Mvp110 Software

    Chapter 4 - MVP110 Software...

  • Page 41: Introduction

    Chapter 4 - MultiVOIP Software Introduction This chapter describes various features of the MVP110 software that enable you to change (update) the configuration of your MVP110. The basic configuration parameters were entered during the loading of the software (Chapter 3). The MVP110 software and configuration utilities described in this chapter enable you to change that initial configuration as necessary.

  • Page 42: Mvp110 Configuration

    Chapter 4 - MultiVOIP Software MVP110 Configuration The MVP110 Setup menu consists of 10 buttons, an Events window in the middle of the menu, and a status bar at the bottom of the menu. The 10 buttons allow you to display and change the voice channels and IP protocol parameters, display and manage the Phone Book listing, view statistics and call progress, and change features such as SNMP Agent, Telnet Server, WEB Server, and assign a MVP110 password.

  • Page 43: Changing Channel Parameters

    Chapter 4 - MultiVOIP Software Changing Channel Parameters The channel parameters include the interface type and its options, voice and fax settings, billing and security, and voice communications for the country and region in which the MVP110 is operating. The Channel Setup dialog box, accessed by clicking Voice Channels on the Setup menu, has four tabs that display the following categories of channel information -- Interface, Voice/Fax, Billing/Misc, and Regional.

  • Page 44: Voice/Fax Tab

    Max Baud Rate should be set to match the baud rate of the fax machine (refer to user documentation). The Fax Volume setting controls the output level of the fax tones, and this setting should be changed only under the direction of Multi-Tech’s Technical Support personnel (see Chapter 6 - Warranty, Service and Tech Support).

  • Page 45: Billing/Misc

    Chapter 4 - MultiVOIP Software remove echo and improve the quality of sound; and, Forward Error Correction allowing some of the voice packets that were corrupted (or lost) to be recovered. FEC adds an additional 50% overhead to the total network bandwidth consumed by the voice channel. Billing/Misc This tab controls the parameters for auto call, automatic disconnection, billing options, and dynamic jitter buffer.

  • Page 46: Regional Tab

    Chapter 4 - MultiVOIP Software minimum and maximum values. An Optimization Factor adjustment controls how quickly the length of the Jitter Buffer is increased when jitter increases on the network. The length of the jitter buffer directly effects the voice delay between MVP110 gateways. The default minimum dynamic jitter buffer of 150 milliseconds is the minimum delay that would be acceptable over a low jitter network.

  • Page 47: Changing The Phone Directory Database

    H.323 protocol gatekeeper that provides a centralized call control center. The proprietary database can only be used when all the end points in the VOIP network are Multi-Tech VOIP products. The gatekeeper centralized call control center contains the phone directory database when all VOIP gateways and endpoints support the H.323 protocol.

  • Page 48: Proprietary Phone Directory Database

    Chapter 4 - MultiVOIP Software If the Proprietary PhoneBook option is enabled, the Database Type group is active which defines the Master and Slave relationship. If the database type is master, then the Add, Delete, Edit, Hunt, and Print buttons at the top of the database dialog box are active. This allows the master database to build the phone directory.
  • Page 49 Chapter 4 - MultiVOIP Software Description window is like names in a local telephone book listing. It identifies the calling party. The voice channel window defines the voice channel associated with the telephone. The Station Identification group enables you to assign the entry to a Hunt Group, provide the IP Address of the MultiVOIP being assigned the phone number, and accept the H.323 industry standard Port number.

  • Page 50: Gatekeeper Phone Directory Database

    Chapter 4 - MultiVOIP Software Gatekeeper Phone Directory Database With the Gatekeeper Phone Directory Database, the Gatekeeper acts as the central point for all calls within its zone and provides call control services to registered endpoints. The Gatekeeper performs address translation from LAN aliases to IP addresses and provides bandwidth management where the network manager has specified a threshold for the number of simultaneous calls on the LAN.
  • Page 51 Chapter 4 - MultiVOIP Software The Phone Directory Database in a H.323 Gatekeeper network only displays the station information and station identification of the local unit. The station information and identification have to be entered in conjunction with the Gatekeeper administrator so that the identification of the endpoint is the same.

  • Page 52: Changing Ip Parameters

    Chapter 4 - MultiVOIP Software defined by the Gatekeeper. The registration method is determined by the Gatekeeper administrator and will require communication with each endpoint in order to develop the H.323 compatiable network. The Phone Directory Database for the local unit contains the local phone numbers, destination details of the IP address, port number, and channel number of the local unit.

  • Page 53: Viewing Call Progress

    Chapter 4 - MultiVOIP Software support this feature. If so, enable this function. The Frame Type list enables you to change the Ethernet Frame Type so that it matches your IP network. If the current entry does not match your IP network, select the Frame Type from the Frame Type list.

  • Page 54: Applications Setup

    Chapter 4 - MultiVOIP Software Applications Setup Clicking Others on the Setup menu displays the Applications Setup dialog box. This dialog box allows you to enable SNMP Agent (the default is disabled) and set up all the necessary parameters; enable or disable various remote configuration methods such as TFTP (Trivial File Transfer Protocol) Server, Web Server, Dumb Terminal Management, and Telnet Server;...

  • Page 55: Viewing Statistics

    Chapter 4 - MultiVOIP Software Viewing Statistics The Statistics dialog box enables you to view statistics for major events of the MVP110 operation. This dialog box is accessed by clicking Statistics on the MVP110 Main menu. The Voice Channel statistics shows the attempted and completed calls, call duration, average call length, bytes/packets sent and received.

  • Page 56: Snmp Statistics

    (2) agents, and (3) the network management systems. The managed device is the network device, like a router. The agent is the software module residing in the managed device pertaining to network management. The network management system runs the SNMP application that controls the managed devices and monitors their status.

  • Page 57: Viewing Log Entry Details

    Chapter 4 - MultiVOIP Software The Log Entries dialog box displays each call as a sequentially numbered Event with the date, time, duration of the call, the status of the call (Successful or Unsuccessful), Mode (Voice or Fax), and the from and to numbers.

  • Page 58: Reports

    Chapter 4 - MultiVOIP Software Reports A report of the contents of the Log Entries dialog box can be generated using the Windows Notepad accessory and then printed from your local PC. The report is generated by entering the To and From dates in the Report Generation dialog box and then clicking Generate.

  • Page 59: Upgrade Procedures

    IP address, and voice channel configurations; these settings must be put back in place after the software has been upgraded. Multi-Tech also recommends that you use the Print button on the Phone Directory Database dialog box to have a copy of the phone directory contents.
  • Page 60 Chapter 4 - MultiVOIP Software Enter your current configuration in the Channel Setup dialog box. Click OK when finished. Click OK. The MultiVOIP firmware, coders, and H.323 stack are downloaded, then the MVP110 reboots. Except for downloading the Boot Code, upgraded versions of the other files (firmware, coders, and H.323 stack) can be downloaded individually using the following manual procedures.
  • Page 61 Manual Upgrade Procedure Follow this procedure only if you want to manually upgrade your MultiVOIP. Note: Steps 4-8 must be performed locally via the command port. 1. Run MultiVOIP configuration from your old version of MultiVOIP software and take note of the current settings.

  • Page 62: Chapter 5 - Remote Configuration

    Chapter 5 - Remote Configuration...

  • Page 63: Introduction

    Introduction This chapter provides procedures for viewing or changing the configuration of a remote unit. Two methods are provided to access a remote unit; the first method is modem based and the second method uses IP. Within the IP method, three applications can be used: 1) LAN-Based using TFTP (Trivial File Transfer Protocol), 2) Telnet as a client application, or 3) a standard web browser on the Internet.
  • Page 64 Verify that the Communication Type is set for COM Port and the COM port of your local PC is selected in the Select Port list. In the Dial String box, enter the AT command for dialing (ATDT) plus the phone number of the remote MVP110.

  • Page 65: Lan-Based

    LAN-Based The LAN-based remote configuration requires a Windows Sockets compliant TCP/IP stack. TCP/IP protocol software must be installed and functional before the configuration program can be used. 1. You must assign an Internet (IP) address for the PC and for each node that will be managed by the configuration program.

  • Page 66: Telnet

    7. After you have changed the configuration of the remote MultiVOIP , click Download Setup to update the configuration. The remote MultiVOIP will be brought down, the new configuration written to the unit, and the unit will reboot. 8. Click Exit when downloading is complete. 9.

  • Page 67: Web Management

    Chapter 5 - Remote Configuration and Management Directory Database, and Phone Directory Configuration. A further option enables you to close the Telnet session. Voice over IP Configuration Selecting Option 1 displays the Main menu, which allows further configuration options. These options include Protocol Stacks (option 1), Applications (option 2), System Information (option 3), and Voice Channels (option 4).
  • Page 68 Chapter 5 - Remote Configuration and Management If a Password was entered in the Applications Setup dialog box, then enter the password and the Enter. From this page you can access all the configuration options. Refer to Chapter 4 - MVP110 Software, for a description of the configuration options.

  • Page 69: Chapter 6 - Warranty, Service And Tech Support

    Chapter 6 - Warranty, Service and Tech Support...

  • Page 70: Introduction

    Internet. Limited Warranty Multi-Tech Systems, Inc., (hereafter “MTS”) warrants that its products will be free from defects in material or workmanship for a period of two years from date of purchase, or if proof of purchase is not provided, two years from date of shipment.

  • Page 71: Addendum For International Products

    Repair Accounting department at +(763) 785-3500 in the U.S.A., or a nearby Multi-Tech office which is listed on the “Multi-Tech Corporate Offices” sheet in this International Distributor Resource Kit.

  • Page 72: Ordering Accessories

    Tech Support Multi-Tech has an excellent staff of technical support personnel available to help you get the most out of your Multi-Tech product. If you have any questions about the operation of this unit, call 1-800-972- 2439. Please fill out the MVP110 information (below), and have it available when you call. If your MVP110 requires service, the tech support specialist will guide you on how to send it in (refer to the next section).

  • Page 73: Appendixes

    Appendixes...

  • Page 74: Appendix A - Tcp/Ip Description

    First, choose a domain name for your company. A domain name is the unique Internet name, usually the name of your business, that identifies your company. For example, Multi-Tech’s domain name is multitech.com ( .com indicates this is a commercial organization; .edu denotes educational organizations, .gov denotes government organizations).
  • Page 75 circuit establishment and termination. UDP’s primary function is to add a port number to the IP address to provide a socket for the application. The Application Layer protocols are examples of common TCP/IP applications and utilities, which include: • Telnet (Telecommunication Network): a virtual terminal protocol allowing a user logged on to one TCP/IP host to access other hosts on the network, described in RFC 854 ( ftp:// ds.internic.net/rfc/rfc854.txt).
  • Page 76 You first choose a domain name for your company. A domain name is the unique Internet name, usually the name of your business, that identifies your company. For example, Multi-Tech’s domain name is multitech.com (where .com indicates this is a commercial organization; .edu denotes educational organizations, .gov denotes government organizations).

  • Page 77: Appendix B - Cabling Diagrams

    Appendix B - Cabling Diagrams Command Port Cable LAN Cable Circuit Signal Name TD+ Data Transmit Positive TD- Data Transmit Negative RD+ Data Receive Positive RD- Data Receive Negative Phone Connector Pin Connections Description Ring RJ-45 DB9F PIN NO. PIN NO. CLEAR TO SEND To Command Port Connector...
  • Page 78 Appendix B - Cabling Diagrams Remote Configuration Cable...

  • Page 79: Appendix C - Regulatory Information

    Appendix C - Regulatory Information Class A Statement FCC Part 15 NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
  • Page 80 7. No repairs are to be made by you. Repairs are to be made only by Multi-Tech Systems or its licensees. Unauthorized repairs void registration and warranty.

  • Page 81: Canadian Limitations Notice

    Appendix C - Regulatory Information Canadian Limitations Notice Ringer Equivalence Number Notice: The ringer equivalence number (REN) assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a phone interface. The termination on an interface may consist of any combination of devices subject only to the requirement that the sum of the ringer equivalence numbers of all the devices does not exceed 5.

  • Page 82: Glossary

    Glossary...
  • Page 83 Glossary Access: The T1 line element made up of two pairs of wire that the phone company brings to the customer premises. The Access portion ends with a connection at the local telco (LEC or RBOC). Accunet Spectrum of Digital Services (ASDS): The AT&T 56K bps leased (private) line service. Similar to services of MCI and Sprint. ASDS is available in nx56/64K bps, where n=1, 2, 4, 6, 8, 12.
  • Page 84 Glossary Bell Operating Companies (BOC): The family of corporations created during the divestiture of AT&T. BOCs are independent companies which service a specific region of the US. Also called Regional Bell Operating Companies (RBOCs). Bell Pub 41450: The Bell publication defining requirements for data format conversion, line conditioning, and termination for direct DDS connection.
  • Page 85 Glossary Circuit-switched Network: A technology used by the PSTN that allocates a pair of conductors for the exclusive use of one communication path. Circuit switching allows multiple conversations on one talk path only if the end-users multiplex the signals prior to transmission. Circuit switching: The temporary connection of two or more communications channels using a fixed, non-shareable path through the network.
  • Page 86 Glossary Device driver: Software that controls how a computer communicates with a device, such as a printer or mouse. Digital Cross-connect System (DCS): The CO device which splits and redistributes the T1 bandwidth. the DCS takes time slots from various T1 lines and alters them to provide the needed connectivity. DCS connections are made with software at an administrator's workstation.
  • Page 87 Glossary Exchange: A unit (public or private) that can consist of one or more central offices established to serve a specified area. An exchange typically has a single rate of charges (tariffs) that has previously been approved by a regulatory group. Exchange Area: A geographical area with a single uniform set of charges (tariffs), approved by a regulatory group, for phone services.
  • Page 88 Glossary Gatekeeper: An H.323 entity that provides address translation, control access, and sometimes bandwidth management to the LAN for H.323 endpoints. Gateway: 1. A functional unit that interconnects two computer networks with different network architectures. A gateway connects networks or systems of different architectures.
  • Page 89 Glossary ISDN (Integrated Services Digital Network): An International telecommunications standard for transmitting voice, video and data over a digital communications line. ISDN is a world-wide telecommunications service that uses digital transmission and switching technology to support voice and digital data communications. Frame relay was partially based on ISDN's data link layer protocol (LAPD). Frame relay can be used to transmit across ISDN services offering circuit-switched connection at 64K bps and higher speeds.
  • Page 90 Glossary Management Information Base (MIB): A database of network management information used by the Common Management Information Protocol (CMIP) and the Simple Network Management Protocol (SNMP). Megacom: An AT&T service with a normal WATS line (typically T1) between the customer premise and the AT&T serving class 4 CO are the customer's responsibility.
  • Page 91 Glossary Outage: The measure of the time during which a circuit is not available for use due to service interrupt. Outage is the complement of circuit "availability" (100% minus % available = % outage). Out-of-band: Signaling that is separated from the channel carrying the information (i.e., the voice/data/video signal is separate from the carrier signal).
  • Page 92 24 8-bit time slots is "robbed" every sixth frame to convey voice-related signaling information such as on-hook, off-hook, etc., for each channel. Router: A device that connects two networks using the same networking protocol. It operates at the Network Layer (Layer 3) of the OSI model for forwarding decisions.
  • Page 93 Glossary Simultaneous Voice Data (SVD): A technology for letting a user send data via a modem, and use a handset to talk to another user at the same time over the same connection. The alternative, making a second call, can be expensive or even impossible. The uses for SVD are telecommuting, videoconferencing, distant learning, tech support, etc.
  • Page 94 Glossary Time-Division Multiplexing (TDM): Division of a transmission facility into two or more channels by allotting the common channel to several different information channels, one at a time. Time Slot: One of 24 channels within a T1 line. Each channel has a 64K bps maximum bandwidth. "Time slot" implies the time division multiplexing organization of the T1 signal.

  • Page 95: Index

    Industry Canada statement ... 79 Installing MultiVOIP software ... 21 Inter digit time ... 43 Internet Multi-Tech's Web site ... 72 Internet protocol (IP) ... 76 IP default setup, Master ... 24 IP default setup, Slave ... 34 IP parameters, changing ... 52 IP statistics ...
  • Page 96 Max Baud rate, voice/fax ... 44 Modem-based remote configuration ... 63 MTASR3-200 Accessories, ordering ... 72 MultiVOIP Main menu, introduction ... 41 MultiVOIP Main menu, screen ... 42 MultiVOIP, Telnet server menu ... 66 MVP200 Back panel ... 14 Cabling ... 19 Cabling diagrams ...
  • Page 97 Index Voice/Fax default setup, Master ... 25, 35 Voice/Fax parameters, changing ... 44 Warranty ... 70 WEB Server ... 67...

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